sure thing i was getting these codes on my dd13 van hool 2011 air restriction. i got the def metering valve out and on the injector filter was clogged with def crystalized. i cleaned it with hot water putted back and did a force regen. not only cleared the codes, but force regen finished 100% clear. on the bottom of the air filter their is another piece that i had to removed for me that was the part that was clogged. i would suggest to your viewer to see another video as well as this one, to have a complete cleaning of unit. Thanks for this video friend really helped me.....
Thank you so much. I'm a woman truck driver and the same as other, I'm so glad you do these 2 videos. Thaaank you so much . Parked very worried about the codes but washing you woow helps me a lot.
Thank you. Both your videos help me do it and encourage me to do it myself and not to take it to Machanic. I’m glad I did it myself I learned a lot on the way and I fixed it myself with your help thank you.
Thank you so much mechanic said they don't make them anymore & said I am fuc**** ... Tried to say He can get 1 for $2000 I found this video & will be cleaning & fixing my own!
Remember when he took the flathead screws out, which are the filters? Always put them in hot water to get the white crystal def off unless you have def cleaning solutions. Everything else is A- ok 👍
I saw another video that cleaned only the part of it that you didn't clean. Now, I watched yours and I have the full information about disassembling and putting it back together. Thank you. *the only part that you didn't clean was that piece that takes the air input. In between that piece and the output, there is some sort of reduction that gets clogged with DEF.
Could that be why my truck tells me to stop before it turns off ? I already burned the filters and it was working good for a week. I get a dpf pressure code
I had that same code and Freightliner Davenport Iowa changed out my doser valve and replace the def pump and I got the same code for days later they ripped me off it could have done what you did but wanted to Jack me around
@@TRUCKINGTIPSDIY NO! SAME PROBLEM I DON'T MIND PAYING THE MONEY IF THEY FIX IT THEY DON'T FIX IT IT'S A SCAM I BELIEVE THEY COULD HAVE FIXED IT BUT THEY DECIDED NOT TO FIX IT IT'S ALL A SCAM
I did that worked for a few months and now check light came up again. 4335. Low pressure again. Just gonna buy it. I replace thet other pressure valve that sits on the frame. And that injector it's not easy to pull out I didn't want to break it so I didn't remove it hard ..
One thing he forget to mention is the cleaning out the stainless steel braided line that screws onto the bottom right of valve and screws into scr box that can be clogged too wonderful def system
Great video, I have 2020 freightliner and I'm having an issue with it over spraying, have DEF running out of my exhaust stacks. Any suggestions would be greatly appreciated
What parts would I need to buy in order to fix my truck? It's a 2017 Freightliner Cascadia. The active code is SPN 3226 FMI 20. I have been getting the red triangle 🔺️ with the exclamation point. It then goes into manual and won't go past 5 mph.
Keep getting low pressure and won't do a full regen. I don't think it's the out sensor as it does pick up some pressure. This might be the problem. I noticed air kicking back out from the airline. I changed the quick connect, but I'm not convinced that is it. I will try this next if it doesn't work.
I clean injectors on fuel injection can't i connect negative and positive and clean it with carb cleaner this video is helpful but i wonder why you didn't clean injector
What year did they change the configuration? I dont have that valve mine is a 2015 or am i looking in the wrong place? I was trying to help a guy find his on a 2016 and we couldn't find it either
This is a GREAT video. This video is definitely a great preventive maintenance video. Question for you >>> What/where or if you know, where we self-mechanics can get the code/scanner - readers-resets for truck(s): Autozone/NAPA/ebay?? Semi-trucks, do they use OBD2/OBD3???
What codes was yours showing? Mine isn’t having the proper air pressure. Do you think that screen is clogged? Could you have just replaced the entire metering unit? Thanks for your reply
Sir..i have 2013 freightliner casacadia..that truck allways secondary air go down. After shut down even i go 2 shop 2 time they check the whole truck no find where air is leaking..and i hear sounds from that spot is that sounds normal wats the problem you think nead to change this valve..cuz air leak but didnt kno where leak
Check all fuel injectors with a diagnostic laptop , they can see each injector the should all be near to zero, if one is too high it needs to be replaced, , i had that issue once and it fixed it, also clean the doser injector. Let me know if u fix it
Is this the metering valve the same thing as a metering unit?? I have a faulty code 3561 and it says I have low current or a break in the circuit. Could it be a bad wire or something??
you can try cleaning that valve, you can also try resetting the AFT (after treatment) module, check out this video, i had that problem when i put bad def, that light also comes on when you leave the DEF level too low. th-cam.com/video/zr5em086Tv4/w-d-xo.html
I have 2015 I am getting the same code you have it I took the mechanic they told me I have replace the whole def box which is cost a teen thousand dollars but they told me use blue def that code will go away
It’s def whole box have to get change they already see injectors are working well the poor def we fill up from truck stop that one start stuck in sensor it’s better to do by pass the truck
Hi sir I have Freightliner Cascadia to 2016 I cannot find that case saving I cannot find that Qaes on the top of the DPF filter or decide or on the bag I cannot find it do you know where it’s located please thank you
TRUCKING TIPS DIY thank you for youR time to replay Yeah that what was look like I actually a little bit ago I was under my truck I was looking everywhere all way around I couldn’t find it and I think all I need to check is the the air pump or DPF pump When I do diagnostic it’s come. EEC
@@tigerofiraqwhoisallahquien8044 try using the Gallon DEF insted of pump def, the peak blue def, it my fix your problem, let me know how it went! thank you
I have low def pressure. I replaced the def pump about 3 months prior to getting this code. I've had the code for 3 weeks now and I replace to pnemautic switch valve from the def pump and the other screen before that. Now the pressure limiting unit. I have the def doser but haven't switched it out. Bolts feel like they might break. I haven't done this to the metering unit. Will this clear low def pressure code? Or what code was casing this?
I've seen 4364 usually I change the outlet nox sensor, but I always do scr conversion test to trouble shoot this. Because indeed nox conversion always goes down during diesel dosing on a regen. Still the same problem ?
Have you ever had that code, and while doing the scr efficiency test the the scr efficiency stays between 91-96 percent but when you do a Regen to clear the code the scr efficiency drops to about 25 percent?
@@alanjuarez318 yes, once the diesel dosing starts it might be because filters are cracked, but it also could be a bad scr, or even built up def fluid. When the scr is bad it usually starts to fail when dpf outlet temp reaches 900°, but scr inlet temp sensor should be 80 degrees less than dpf outlet temp.
@Jason Lurie, thanks a lot for the reply looking back at my data I knowrest that my scr inlet temp is only about 40-50 degrees lower them the dpf outlet
Jason I contacted you on TikTok today wanted to see if I could ask you a question concerning a 2013 Freightliner. Can you email me at ryan@kebotrans.com
I have changed two metering units in less than a year.My truck still keeps throwing SPN 3361 Fail 07 from time to time.I have changed Air dryer too but still getting too much water out in wet tank.Has anybody faced something similar.
have you tried changing the def filter, also on the dpf box, there's a braided def hose, that goes from metering unit to the dpf box(one box) make sure the hose is not clogged from dry def, and where the hose connects to the dpf box also make sure is not clogged
TRUCKING TIPS I have changed the def filter and pressure limiting valve on the air line too. I haven’t checked the line for dried up def .Thanks Will do that and update
Carlos Rivas I didn't I want to just change the whole unit with a new one. There is video that a mechanic just bypass it all together you think that is good
Carlos Waldo I've been getting this code too. What he did I do at least twice a year. Screen's are cheap. It helps but that code can also be dirty def. Have your mechanic do a quantity check test and see how clean your def is coming out of tank. Mine comes out sort of brown. Even with new filters.
Do you know if the Dealer sales the injector?? Mine keeps on injecting DEF after turning the truck off and leaks a lot under the BOX. Anyone knows what it might be.?
sure thing i was getting these codes on my dd13 van hool 2011 air restriction. i got the def metering valve out and on the injector filter was clogged with def crystalized. i cleaned it with hot water putted back and did a force regen. not only cleared the codes, but force regen finished 100% clear. on the bottom of the air filter their is another piece that i had to removed for me that was the part that was clogged. i would suggest to your viewer to see another video as well as this one, to have a complete cleaning of unit. Thanks for this video friend really helped me.....
Maaan you r the best. Easy like a surgeon, step by step went all way to the root. Thanks for ur time and good piece of info.
i appreciate it thanks for watching!!
WOOOW the way u explain is easy and clear thank you body appreciate u . Thank you
Thank you so much. I'm a woman truck driver and the same as other, I'm so glad you do these 2 videos. Thaaank you so much . Parked very worried about the codes but washing you woow helps me a lot.
Im not a troll. I would like to suggest that this is on a dd15 EPA10 engine in the heading. Thank you for your contribution to help us all out. Peace.
Thank you. Both your videos help me do it and encourage me to do it myself and not to take it to Machanic. I’m glad I did it myself I learned a lot on the way and I fixed it myself with your help thank you.
glat it worked for you, yes some times its easy to do it our selfs insted of paying for it!!
Thank you so much mechanic said they don't make them anymore & said I am fuc**** ... Tried to say He can get 1 for $2000 I found this video & will be cleaning & fixing my own!
Hopefully it works after cleaning it, was it 2000 for a new valve?
They do still make them at Freightliner just need to bring in the core
I just spend$1700 to fix it! Waste my money! Thanks for your videos!!
I feel you mines is going in the shop tonight
What's the part number for 2019 freightliner cascadia
thank you brother you Save me a lot of money and instead go to the dealer I changed by myself
Nice!!!
Remember when he took the flathead screws out, which are the filters? Always put them in hot water to get the white crystal def off unless you have def cleaning solutions. Everything else is A- ok 👍
Gracias buddy we appreciate your videos.
Thank you for watching, gracias 🙏
Thank you so much Brother. For the video, the instructions and most of all the detailed view of how to do everything. This was a great job. Thanks
I saw another video that cleaned only the part of it that you didn't clean. Now, I watched yours and I have the full information about disassembling and putting it back together. Thank you.
*the only part that you didn't clean was that piece that takes the air input. In between that piece and the output, there is some sort of reduction that gets clogged with DEF.
So this would clear spn 3361 fmi 4 ? I have a 2016 intl ProStar
Great DIY video. Thank you!
Could that be why my truck tells me to stop before it turns off ? I already burned the filters and it was working good for a week. I get a dpf pressure code
You're a Saint bro " Santo niño De Def " lol thank you for this video bro God bless you
Gracias amigo
You can remove two of these sensors with a 1 1/16 socket and the other with a 7/8 socket
Thanks u bos for this video 🎉🎉🎉🎉
I heard just water will clean them out due to whatever the def is made out of. Great video 👍🏽
Hot water yes
I had that same code and Freightliner Davenport Iowa changed out my doser valve and replace the def pump and I got the same code for days later they ripped me off it could have done what you did but wanted to Jack me around
did they fix your problem? yes the dealer will charge alot, i paid them 4k one time
@@TRUCKINGTIPSDIY NO! SAME PROBLEM I DON'T MIND PAYING THE MONEY IF THEY FIX IT THEY DON'T FIX IT IT'S A SCAM I BELIEVE THEY COULD HAVE FIXED IT BUT THEY DECIDED NOT TO FIX IT IT'S ALL A SCAM
@@ThatOneGuy-hp2pb that sucks are you still having that problem, what code are you getting
I did that worked for a few months and now check light came up again. 4335. Low pressure again. Just gonna buy it. I replace thet other pressure valve that sits on the frame. And that injector it's not easy to pull out I didn't want to break it so I didn't remove it hard ..
Good video brotha gonna remove mine and do it
Great video brother learning a lot just subcribed to your channel thanks a lot God bless you
Thank you. very helpful video
One thing he forget to mention is the cleaning out the stainless steel braided line that screws onto the bottom right of valve and screws into scr box that can be clogged too wonderful def system
appreciate your video
Thank you for your video. I follow all your instructions and I was able to change it to a new one and the code has disappeared!
Thanks for the video.
Is there a video on where the o rings go in the metering valve.
any idea which codes they are? And an easier way to narrow it down to this being bad instead of something else?
yes codes , snp 4364 / SPN 3361
I replaced installed new metering valve..but code & solid yellow light still there....do I need to clear the code with computer..??
Very informative
THANKS BRO
thank you sir!!!
Whats up bro what are those 2 connections to the right of the valve ? The connections on top of the stacked blocks on the righ
Just subscribe brother 👍🏼
Very helpful information. Straight to the point!! God bless 🙏🏼
Thx for the video sir. How often do you recommend doing this service?
Can’t find the DEF Meter Valve in my 2016 Freightliner cascadia. Not anywhere around DPF filter. Any Idea?
Newer trucks dont have them
Where is the 8 pin dosing connecter located
Great video, I have 2020 freightliner and I'm having an issue with it over spraying, have DEF running out of my exhaust stacks. Any suggestions would be greatly appreciated
Did you get help with excessive DEF usage?
2016 freightliner tried this but mine was on top of the tank and it looked different I took it in to Freightliner $1667 to replace the doser.
This mo foker in dealership know only replace the shit no fixing at all and charge u arm and leg
2:02 you actually push it in then pull the connector off but whatevers easier.. wouldn't want to lose it
What parts would I need to buy in order to fix my truck? It's a 2017 Freightliner Cascadia. The active code is SPN 3226 FMI 20. I have been getting the red triangle 🔺️ with the exclamation point. It then goes into manual and won't go past 5 mph.
It could be different parts to fix the issue, once you fix it, try not to idle the truck for long periods of time,
Hey trucker family
Whats the part number fro 2019 freightliner cascadia??? I can find that value dealership think im stupid. I need help
Do newer trucks have this unit 2015 and up? Or which years do these have. Can't find on my 2017. But my 2013 is have.
i think 2015 and up dont have this valve anymore they have different type
Damn bro thanks for that info I will do that once I’m back home very informative and straight to the point to bs 👍🏻👍🏻👊🏻😎👊🏻
Chago saludos una pregunta y cuánto cuesta esa parte aver si me puedes decir por favor
Saludos Rafael, cuando yo la compre page como $500.
Leave all the filters in a container with vinegar with water for a few hrs will clean them like new.
i will try that next time👍👍
Wow the filter is only 50 bucks. If your that broke maybe you shouldn’t own a truck
@@loofookilla2816 why spend the money if you don't have to? That's how the dealers stay rich
@loofookilla2816 what's the part number for 2019 freightliner cascadia???? I can't find it
Keep getting low pressure and won't do a full regen. I don't think it's the out sensor as it does pick up some pressure.
This might be the problem. I noticed air kicking back out from the airline. I changed the quick connect, but I'm not convinced that is it. I will try this next if it doesn't work.
Do you know if any of those codes are spn 4334 fmi 3
Where can i find the internal parts
Did you find one??? I need part number for 2019 freightliner cascadia
@BabyBaby-ph4uo 19 doesnt use this. This is an epa10 issue
Wow great video ! Did u have to drop take for this ??
I clean injectors on fuel injection can't i connect negative and positive and clean it with carb cleaner this video is helpful but i wonder why you didn't clean injector
My 2013 cascadia spend to much def...what can be any idea?
Why do These go bad? Or what might be some symptoms if this is bad
DEF drys inside the valve filters, it gets clogged, it can give you codes also when you're going up hill it can give you a codes, thanks!!!👍👍
TRUCKING TIPS DIY any idea which codes they are? Ann an easier way to narrow it down to this being bad instead of something else?
Thank you very much. Very helpful.
Thanks for watching sir 🙏
What year did they change the configuration? I dont have that valve mine is a 2015 or am i looking in the wrong place? I was trying to help a guy find his on a 2016 and we couldn't find it either
Super amazing 🙏🏻thank you
This is a GREAT video. This video is definitely a great preventive maintenance video. Question for you >>> What/where or if you know, where we self-mechanics can get the code/scanner - readers-resets for truck(s): Autozone/NAPA/ebay?? Semi-trucks, do they use OBD2/OBD3???
Is it help code eec61 .? My truck engine light is on with code eec61
What codes was yours showing? Mine isn’t having the proper air pressure. Do you think that screen is clogged? Could you have just replaced the entire metering unit? Thanks for your reply
I has getting those codes in the title, i ended replacing the valve with a new one, what code you getting?
Can you use break cleaner to cleanthe filters?
I did used break cleaner, and compressed air
thanks for this video
A little visit from the ether bunny
Sir..i have 2013 freightliner casacadia..that truck allways secondary air go down. After shut down even i go 2 shop 2 time they check the whole truck no find where air is leaking..and i hear sounds from that spot is that sounds normal wats the problem you think nead to change this valve..cuz air leak but didnt kno where leak
this valve only has 1 air line , check the fitting it may be leaking air, its a 1/4 hose
great video I was wonder why I get this code only when going up hill with a heavy load then after couple days code disappears
Same. 2nd time.
Cash_NYC same problem. What was the cause?? How did you fix it pleas reply
@@transport21 cleaning this unit will help you fix that problem, (it fixed mine)
TRUCKING TIPS how come you used starting fluid instead f wd -40. Just wondering what issues could happen if you use it
@@transport21 i used starting fluid because it wipes out everything, grease, oil,dirt.
I replaced the metering unit and both nox sensors I'm still getting code spn4364 18. what else can I check
Check one box, it might be damaged
@@TRUCKINGTIPSDIY one box was replaced about a year ago
Check all fuel injectors with a diagnostic laptop , they can see each injector the should all be near to zero, if one is too high it needs to be replaced, , i had that issue once and it fixed it, also clean the doser injector. Let me know if u fix it
@@TRUCKINGTIPSDIY ok thanks
On my 13' freight, I can drive for like 3 days n the def doesn't get low. I hope this is the reason why.
Having same problem...what was the issue?
thanks excellent information
thanks for watching
Are the 2014 dd15 similar to this ???…..
Im not sure wat year they changed the system, i think 2014 is still the same, its easy to see the valve
@@TRUCKINGTIPSDIY thank you sir, great video brother…….keep up the good work
Is this the metering valve the same thing as a metering unit?? I have a faulty code 3561 and it says I have low current or a break in the circuit. Could it be a bad wire or something??
Yes, votage on pin 1 should be above 11.75 and on pin 2 should be 2.5
I have a code 4374 showing me my def blinking like its low or something will this help?Thank you in advance.
you can try cleaning that valve, you can also try resetting the AFT (after treatment) module, check out this video, i had that problem when i put bad def, that light also comes on when you leave the DEF level too low.
th-cam.com/video/zr5em086Tv4/w-d-xo.html
Wow great video
How do you if its bad/clogged or not tho?
Nice vid bro. I have spn 4364 with the orange engine light on. Do you think It will be fixed if i do the cleaning ?
Thanks
I have code spn 3251 fmi 2 and my dash board I have amber light on any advice sir ,Thanks
So what we use that for
Hi there. Emissions system problem detected service engine soon SPN 4364 FMI 18 do you think this may be the problem ? Its 2015 cascadia dd15 thanks
I have 2015 I am getting the same code you have it I took the mechanic they told me I have replace the whole def box which is cost a teen thousand dollars but they told me use blue def that code will go away
have your mechanic test the injectors , i had that issue, it wss 2 injectors that were bad causing too much smog,
It’s def whole box have to get change they already see injectors are working well the poor def we fill up from truck stop that one start stuck in sensor it’s better to do by pass the truck
Do you have an idea how I can fix this let me know please thank you
Good video do you have to empty def tank or will it not leak as the pump is not running.
you dont have to empty def tank, it will not leak, thanks you!
Thanks for the vid- I like saved and subscribed. This damn DEF shit hahahahahHahHahah
Nice but u didn't explain the sensors and how it works in the doser module
Thanks for the video I think you forgot to put a clip back on the bottom fitting
ill go back and check the video, what minute?
12:55 I think that is supposed yo have a metal clip
Minute 1:55 you actually mention and show the metal clip
@@maximusmurua4437 i see it now , make sure you guys put that clip in too, im pretty sure i did it off video, thanks for noticing!!
@@TRUCKINGTIPSDIY In the future you don't have to remove that metal clip just depress the long exposed end and the plug will pull right off
Hi sir I have Freightliner Cascadia to 2016 I cannot find that case saving I cannot find that Qaes on the top of the DPF filter or decide or on the bag I cannot find it do you know where it’s located please thank you
hello, i think 2015 and up, dont have this valve
TRUCKING TIPS DIY thank you for youR time to replay Yeah that what was look like I actually a little bit ago I was under my truck I was looking everywhere all way around I couldn’t find it and I think all I need to check is the the air pump or DPF pump When I do diagnostic it’s come. EEC
@@tigerofiraqwhoisallahquien8044 try using the Gallon DEF insted of pump def, the peak blue def, it my fix your problem, let me know how it went! thank you
I have low def pressure. I replaced the def pump about 3 months prior to getting this code. I've had the code for 3 weeks now and I replace to pnemautic switch valve from the def pump and the other screen before that. Now the pressure limiting unit. I have the def doser but haven't switched it out. Bolts feel like they might break. I haven't done this to the metering unit. Will this clear low def pressure code? Or what code was casing this?
it might clear it, this valve clogs alot
If it keeps clogging theres a contamination in the air system.
We’re are you located
I've seen 4364 usually I change the outlet nox sensor, but I always do scr conversion test to trouble shoot this. Because indeed nox conversion always goes down during diesel dosing on a regen. Still the same problem ?
Jason Lurie your one box is bad ,
Have you ever had that code, and while doing the scr efficiency test the the scr efficiency stays between 91-96 percent but when you do a Regen to clear the code the scr efficiency drops to about 25 percent?
@@alanjuarez318 yes, once the diesel dosing starts it might be because filters are cracked, but it also could be a bad scr, or even built up def fluid. When the scr is bad it usually starts to fail when dpf outlet temp reaches 900°, but scr inlet temp sensor should be 80 degrees less than dpf outlet temp.
@Jason Lurie, thanks a lot for the reply looking back at my data I knowrest that my scr inlet temp is only about 40-50 degrees lower them the dpf outlet
Jason I contacted you on TikTok today wanted to see if I could ask you a question concerning a 2013 Freightliner. Can you email me at ryan@kebotrans.com
Where is this part exactly?
On the side of the dpf box,, but its only on older models i think 2014 and down
Dude Thank you..
Thank you sir 🙏
What truck is this from..? Trying to find out if it's the same as my DD15..
this truck is a dd15 2013 cascadia
So the part that you cleaned is not the one that you put back on the truck… 🧐
Why was that?
I used parts from 2 different valves i had , to use the better parts
That is very expensive with and without the core
Thanks
I have changed two metering units in less than a year.My truck still keeps throwing SPN 3361 Fail 07 from time to time.I have changed Air dryer too but still getting too much water out in wet tank.Has anybody faced something similar.
have you tried changing the def filter, also on the dpf box, there's a braided def hose, that goes from metering unit to the dpf box(one box) make sure the hose is not clogged from dry def, and where the hose connects to the dpf box also make sure is not clogged
TRUCKING TIPS
I have changed the def filter and pressure limiting valve on the air line too. I haven’t checked the line for dried up def .Thanks
Will do that and update
Can you PLEASE DO A TOOL BOX TOUR😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍
How tf did u get those clips off 😫
Were you able to remove them?
Did you use old screen s
Carlos Rivas I didn't I want to just change the whole unit with a new one. There is video that a mechanic just bypass it all together you think that is good
i used the same screens, my dealer didn't have them
If your truck ever gets Derated to 5MPH Check Out This video
th-cam.com/video/q1gGn716wQE/w-d-xo.html
Does this fix the 3364 Fmi 2 codr
Carlos Waldo I've been getting this code too. What he did I do at least twice a year. Screen's are cheap. It helps but that code can also be dirty def. Have your mechanic do a quantity check test and see how clean your def is coming out of tank. Mine comes out sort of brown. Even with new filters.
If you live out of CA yes delete the system. Is better.
yes it should help , also try cleaning the def pump screen
@@TRUCKINGTIPSDIY Please can you show how to clean def pump screen thanks. Great video
@@Mixteco1 next time i do that job i will make a video on it, thanks for watching!!
👍
Where’s the shut off valve on the cascadia
hello, shut off valve for what?
@@TRUCKINGTIPSDIY
Hey I’m having the same problem with my def meter. Do the sensors on top of the meter go bad? Can you buy them separately?
What 3 numbnuts disliked the video?
Ml Moore exactly
Dealer mechs! Lol
Freightliner mechanics lol
@@kofibabone725 most of them are slow,lazy, and charge too much money. Soon very few people will be going to them for minor issues.
Do you know if the Dealer sales the injector?? Mine keeps on injecting DEF after turning the truck off and leaks a lot under the BOX. Anyone knows what it might be.?
dealer might sale the injector its self, if not you can get the part number and go to mercedes dealer (the injector is a Mercedes Benz)
TRUCKINGTIPS thank you for your info. We all appreciate your work. 👍🏼
Isn't that normal that sound of air is because the injecror is getting cleaned by rhe sistem .Right?