No kidding I have been through that same ordeal before it was mentioned before in a comment but I would look at your exhaust muffler maybe put a can on it and at least try it. That’s what cured mine with the same issue.
Have a very similar issue. Replaced the primary, serviced the secondary, cleaned APVs, replaced the power valve cables, the belt and safety throttle switch. Also ohm’d the stator. Same problem still exists. Subscribed to find out more with your journey. Will help out with yours if I find anything else! Love the work 🤘🏼
Did u have engine light blinking any codes? i had my f7 run great up to 6700 when the pow valves supposed to open it set the engine light and run like crap ended being the wire harness chaffing to the servo motor.from what you are describing sounds like same what I had also dump fuel,those spark plugs are very rich too
Belt deflection can cause it too. They are super sensitive. I had the same symptoms and chased it for a while, changed deflection to be a little tighter and cleaned it right up
I have an 03 f7 doing the same thing. Almost the same amount of miles. Mine started to flash the servo motor code so I replaced it and my power valve cables and cleaned the power valve. Same issue still was thinking it was wiring. Or maybe the voltage regulator I hear it only works your head lights and servo. Have no head light issues. Also plan on checking for wore spots in wires and grounds. Good luck let me know what it is and I’ll do the same.
Hey I just got mine running put roughly 80 miles on her today with no issues. Ended up being my voltage regulator. I picked one up on Amazon for $80. Wish I tried it first would have saved a lot of time and money.
Did you clean your power valves do a compression check make sure you’re exhausted isn’t plugged up mice like to make this in silencers make sure your throttle bodies are opening all the way that your cable didn’t stretch could I have a broken reed
Power valves are 100% cleaned and adjusted properly. Compression is 130 PSI on both cylinders. Throttle bodies are opening all the way. I will check the silencer and reeds next. Thanks 👍🏻
99% sure it's your powervalves, they open at 7200! Your servo should cycle at start up and also it's possible to put the servo on wrong and also possible that the power valves are in backwards, if even one is backwards it won't work so both must me in the correct direction! If you take the cables off the servo you should beable to pull them and hear the power valves clicking up and down if not then one of the springs could be bad! Also check your secondary spring! I had the exact same problem on my 03!
Thanks- The powervalves are operating as should, and are oriented correctly and cleaned. Secondary spring and other wear components have all been replaced with the same symptoms present after as before.
What is that switch do what is it wired to what is it changing? Also get a fuel pressure gauge your not going to be able to troubleshoot properly by just assuming cause it runs its fine also pull the fuel injectors off and clean them your going to need to open the solenoid with a 12 volt DC power supply or battery then spray a good parts cleaner
That switch tells the ECU to send more or less fuel depending on what ethanol blend you are running. I did purchase a fuel pressure tester last year and it spec’d out good. Also removed and cleaned the injectors just like you described above. So, now I’m on to the electrical arena. I’m hoping to have it back in the wrenching bay this January and will post another video with updates.
Not 100% yet, but I believe I have narrowed it down to the stator. Fuel pressure was great throughout the entire rev cycle, on the test stand. So, the fuel system seems to be performing just fine. I think electrical is my only other option. I’m hoping to have the machine back in the work bay this January and will upload more videos of my findings 👍🏻
Yes, you do need it for 10% blend, it sends more fuel to account for the Ethanol, which is leaner by nature. E-85 is not recommended at all for these machines.
Yeah, the modern engines can compensate for it with EFI, but the older models such as this required two different fuel maps to run properly. (Accomplished by this switch)👍🏻
@@Nelson_Service I gotcha one more question belt alignment bolt big washer long spacer two small washers than shims on the back you got a tool to set alignment? Do you know what the gap should be using the tool can't find it anywhere
Get an aftermarket pipe and can you'll save at least 10 pounds can't hurt the rpm I don't know what the problem is though I wouldn't run it in meth mode. 10 percent does not merit that. 😊
you should check it for timing . my F7 2005 twisted the timing key .
Thanks! I’ll take a look at that as well.
No kidding I have been through that same ordeal before it was mentioned before in a comment but I would look at your exhaust muffler maybe put a can on it and at least try it. That’s what cured mine with the same issue.
Will do, thanks!
Have a very similar issue. Replaced the primary, serviced the secondary, cleaned APVs, replaced the power valve cables, the belt and safety throttle switch. Also ohm’d the stator. Same problem still exists. Subscribed to find out more with your journey. Will help out with yours if I find anything else! Love the work 🤘🏼
Replaced the spark plug boots, carbon built up and was making the spark arch at high rpm’s. Sled runs much much better now!
Thank you, will do. I did test the fuel system, and that all is operating within spec. Onto electrical I go.
Did u have engine light blinking any codes? i had my f7 run great up to 6700 when the pow valves supposed to open it set the engine light and run like crap ended being the wire harness chaffing to the servo motor.from what you are describing sounds like same what I had also dump fuel,those spark plugs are very rich too
Belt deflection can cause it too. They are super sensitive. I had the same symptoms and chased it for a while, changed deflection to be a little tighter and cleaned it right up
Good call-I also checked this and it's right on.
change belt and adjust defection
@@Nelson_Service
Also check the boots for where the throttle body sit and check your reeds maybe your missing a pedal or 2
Will do, thank you!
I have an 03 f7 doing the same thing. Almost the same amount of miles. Mine started to flash the servo motor code so I replaced it and my power valve cables and cleaned the power valve. Same issue still was thinking it was wiring. Or maybe the voltage regulator I hear it only works your head lights and servo. Have no head light issues. Also plan on checking for wore spots in wires and grounds. Good luck let me know what it is and I’ll do the same.
Sounds really good. I did end up testing the fuel pressure, and everything checked out OK there. So, on to electrical I think.
Hey I just got mine running put roughly 80 miles on her today with no issues. Ended up being my voltage regulator. I picked one up on Amazon for $80. Wish I tried it first would have saved a lot of time and money.
Did you clean your power valves do a compression check make sure you’re exhausted isn’t plugged up mice like to make this in silencers make sure your throttle bodies are opening all the way that your cable didn’t stretch could I have a broken reed
Power valves are 100% cleaned and adjusted properly. Compression is 130 PSI on both cylinders. Throttle bodies are opening all the way.
I will check the silencer and reeds next. Thanks 👍🏻
99% sure it's your powervalves, they open at 7200!
Your servo should cycle at start up and also it's possible to put the servo on wrong and also possible that the power valves are in backwards, if even one is backwards it won't work so both must me in the correct direction! If you take the cables off the servo you should beable to pull them and hear the power valves clicking up and down if not then one of the springs could be bad! Also check your secondary spring! I had the exact same problem on my 03!
Thanks- The powervalves are operating as should, and are oriented correctly and cleaned. Secondary spring and other wear components have all been replaced with the same symptoms present after as before.
What is that switch do what is it wired to what is it changing? Also get a fuel pressure gauge your not going to be able to troubleshoot properly by just assuming cause it runs its fine also pull the fuel injectors off and clean them your going to need to open the solenoid with a 12 volt DC power supply or battery then spray a good parts cleaner
That switch tells the ECU to send more or less fuel depending on what ethanol blend you are running.
I did purchase a fuel pressure tester last year and it spec’d out good. Also removed and cleaned the injectors just like you described above.
So, now I’m on to the electrical arena. I’m hoping to have it back in the wrenching bay this January and will post another video with updates.
Did you ever come to a solution?
Not 100% yet, but I believe I have narrowed it down to the stator. Fuel pressure was great throughout the entire rev cycle, on the test stand. So, the fuel system seems to be performing just fine. I think electrical is my only other option.
I’m hoping to have the machine back in the work bay this January and will upload more videos of my findings 👍🏻
Any findings yet on the problem
You sure you need the ethanol switch for 10% i figured it was for e85. Not a big deal for me my 500gal barrel is ethonal free
Yes, you do need it for 10% blend, it sends more fuel to account for the Ethanol, which is leaner by nature.
E-85 is not recommended at all for these machines.
@@Nelson_Service knew that it'd be leaner just figured the efi would account for it good to know I'll try to stick to my non ethanol then
Yeah, the modern engines can compensate for it with EFI, but the older models such as this required two different fuel maps to run properly. (Accomplished by this switch)👍🏻
@@Nelson_Service I gotcha one more question belt alignment bolt big washer long spacer two small washers than shims on the back you got a tool to set alignment? Do you know what the gap should be using the tool can't find it anywhere
Muffler can cause to much back pressure if it's collapse inside.
I'll check this out. The one that's on there has seen some miles for sure.
Speaking of needing firecat help…. I cannot get my tie rods off the front A-arms! Trying to take the a-arms off to repaint. Anyone have any ideas?
Get an aftermarket pipe and can you'll save at least 10 pounds can't hurt the rpm I don't know what the problem is though I wouldn't run it in meth mode. 10 percent does not merit that. 😊
Don't overlook your coils.
I did test these, and both ohmed within specs, including the plug caps and leads.
Unplug the safety throttle switch? Also reach out to Red Neck Dirty Hands
Throttle safety switch was my problem on mine.Yes,Pete could help him out.He has the f7.
I did check the TSS and that turned out fine. My next step is to test my stator.
I’ll reach out to the individual above as well-thank you!