Thanks for the video & your comments !!!! Very helpful for diagnosing my Chevy Tahoe with not shifting into OD …. and erratic RPM's on the dash tachometer.
I have a 1999 Chevrolet P30 6.5Diesel this guy knows what hes talking about my transmission was not shifting into 2nd gear even at 4000 TPMs and only doing 40KM ...i did the test and replaced the TPS ...walla like night and day it not only shifts better it has more power and has 4 gears i have a GM 4l60E in it .. just wanna sat thank you SIR...have a great day to all from Vancouver Canada BC
Congrats on your success. I have a 94 S10 I bought new and now my youngest son has it. It's sentimental to him, we're doing our best to refurbish it. We replaced the Throttle position sensor but we're still getting a code on it. I've seen some videos that talk about resetting, restoring the idle position. After replacing yours did you have a procedure to follow to do a reset and if so. Where did you find the information. Thanks in advance for any help you may have.
i have a 1998 oldsmobile intrigue 3800 and I had to mount my tps with the throttle body attached. I wasn't able to calibrate it properly. The one time I had a mechanic take the throttle body off and mount it correctly I drove it to louisville and it ran AWESOME but then the engine compartment fire that I had a recall for and was waiting for the replacement part from the dealer who told me, well if it hadn't happened yet it probably wont but it did. I had to take it to dealer in louisvilleon dixy highway to have it fixed.... TPS hasn't been the same since
A code tester like the Actron CP9690 can adjust the TPS. It has live, record, graphing, oil light reset, smog test readiness test, oxygen sensor tests, RPM'S, oil pressure, vacuum, VSS mph, and MORE! It has cables for OBDI for Ford, G. M., Chrysler, and 2 Toyota. It has a OBDII cable. It has a cigarette lighter cable, It comes in a black carrying pouch. Get a 12volt cigarette lighter battery adapter. Instructions are included. It works on cars from 1983-2013. It is updatable.
Marty : I have that scanner . I can see the TPS Voltage on live data stream when the car is RUNNING . However , the TPS on my Chevy has to be adjusted to .55 volts when NOT RUNNING , like in the video . I cannot read voltage on the scanner with the key on , engine off . I borrowed an old Snap On MT 2500 and you could adjust it . But not on the Actron . I even called them twice and they weren't sure . Unless I am missing something ? Let me know if you have done any pre 1996 GM's . Thanks , Bill .
@@billsmith2212 , there is a physical / manual adjustment relearn procedure for setting the base idle on pre 1996 Chevys. th-cam.com/video/nJkPgkMpTFs/w-d-xo.html
Can you tell me the part number of that tps. I keep getting the wrong one (i think) from auto parts store. On your truck as well as mine the throttle rotates counter clockwise but the tps i keep getting cant and wont rotate that direction. It goes clockwise. Not sure why i cant get the right one. But maybe its and odd year on my truck. But your throttle rotates the same as mine so i need the same tps aw your. Comment on this thread. Ill find it.
hey do you know if these are adjustable or do you just bolt them up? my friend installed a intake manifold and is having drivability issues.i did hear you can recalibrate the throttble body do you know how?
2001 Grand Prix with a 3.1-liter motor, started idling high after good and warmed up. No codes at the time. When motor would idle too high, 4T65E trans would shift super late under light throttle. About 25 MPH and 2,500 RPM before it would hit 2nd. gear. Was OK the next day. 3rd. day, high idle and late shift again! This time the check engine light did come on. Code P0121. Scanner TPS angle percentage at idle shows 0 sometimes, and sometimes 0.39% and ~ 100% at WOT. One time while sitting there idling fine, ~ 700 RPM, all at once the idle kicked up to ~1,300 RPM all by itself. I looked at the scanner, now TPS angle percentage went up to 2.75%. From my readings it looks to me like the sensor IS receiving the 5V reference, and my ground in good, and my reference voltage is changing and being sent back to the ECM. My voltmeter is at my buddy's garage right now, so I could not do the voltage testing at the TPS connector, as you have outlined. I'm ready to take a chance based on my findings, and just install a new TPS. What do you think? Reply
It’s pretty simple if you haven’t done it yet you disconnect the negative wire to your battery then you have two Allen bolts that you unscrew from the tps sensor and carefully take it out and replace with the new one
I have a 94 Sonoma 4.3 Vortec. Changed tps, IAC , full tune up. I still have erratic idle and will rev really high at start up like over 2000 rpm but put it in drive it goes down. Tried resetting comp but still same issues. Any suggestions? Maybe bad computer?
@@DIXIEMAFIA251 I reset the computer again by completely unhooking it. Hooked back up the next day and it ran great for a couple of days. Then went back to the same. I’m going to be getting a new comp soon as I don’t drive it much because it’s a low rider that’s all bagged. I’ll definitely keep you updated after I buy it and install it
Been having an intermittent low issue causing hard shifts, randomly hesitating on acceleration the whole shebang I’ve tested 3 different sensors and a new one all with same results dunno if I should find someone with a dvom or try another new sensor
the procedure was flawed, you cant do ohms testing on a live circuit as the way your meter works is your meter injects voltage into the wire to determine the ohms.you only do this ohms test on ground wires on non live circuits to determine if it has a path to ground which isnt a good test either we always want to do loaded circuit testing to stress the ground,.instead you switch to mv scale and it shouldnt exceed 100mv on a low amperage sensor circuit.you will typically see under 0.020mv on a good ground,if you see hundreds of mv or volts or OL on meter you have a voltage drop issue on the ground wire,if you see 5v you have no ground. if you want to learn more about this stuff follow scannerdanner.
If TPS is going bad or messing up or bad does a code come up??? which code? thax i have a 4.3 blazer running like horse shit...i tried everything...no codes...Idles great but hesitates and bucks if i give it gas while driving..
@@bam6972 it's seems good around 60...I did have a bad connection to maf and fixed.seems better...but I am thinking running some good fuel injection cleaner through it may fix it even more...but I also ordered a tps ...I believe it's a combination of issues that is causing problems...I bought it from a jackass,so I have no idea of the trucks history...thanks
your ohms test was wonky because you did it on live circuit which give false readings since your meter injects voltage into the system to determine the ohms,testing live grounds just put on mv scale instead you shouldnt exceed 100mv on a low amperage sensor circuit.ive done this mistake before as well and i use ohms to determine if i have path to ground but not loaded circuit testing
Thanks for the video & your comments !!!! Very helpful for diagnosing my Chevy Tahoe with not shifting into OD …. and erratic RPM's on the dash tachometer.
I have a 1999 Chevrolet P30 6.5Diesel this guy knows what hes talking about my transmission was not shifting into 2nd gear even at 4000 TPMs and only doing 40KM ...i did the test and replaced the TPS ...walla like night and day it not only shifts better it has more power and has 4 gears i have a GM 4l60E in it .. just wanna sat thank you SIR...have a great day to all from Vancouver Canada BC
Congrats on your success. I have a 94 S10 I bought new and now my youngest son has it. It's sentimental to him, we're doing our best to refurbish it. We replaced the Throttle position sensor but we're still getting a code on it. I've seen some videos that talk about resetting, restoring the idle position. After replacing yours did you have a procedure to follow to do a reset and if so. Where did you find the information. Thanks in advance for any help you may have.
i feel really bad for that 4l60. ive got a 3500 6.5 from 96 and it has a 4l80. that 4l60 wont last too long if you tow
My man is a wizard with the leads 😆
Worked like a champ, thank you!
glad it helped.
i have a 1998 oldsmobile intrigue 3800 and I had to mount my tps with the throttle body attached. I wasn't able to calibrate it properly. The one time I had a mechanic take the throttle body off and mount it correctly I drove it to louisville and it ran AWESOME but then the engine compartment fire that I had a recall for and was waiting for the replacement part from the dealer who told me, well if it hadn't happened yet it probably wont but it did. I had to take it to dealer in louisvilleon dixy highway to have it fixed.... TPS hasn't been the same since
Ty
Loved the video, what's the Vortec engine?
A code tester like the Actron CP9690 can adjust the TPS. It has live, record, graphing, oil light reset, smog test readiness test, oxygen sensor tests, RPM'S, oil pressure, vacuum, VSS mph, and MORE! It has cables for OBDI for Ford, G. M., Chrysler, and 2 Toyota. It has a OBDII cable. It has a cigarette lighter cable, It comes in a black carrying pouch. Get a 12volt cigarette lighter battery adapter. Instructions are included. It works on cars from 1983-2013. It is updatable.
Marty : I have that scanner . I can see the TPS Voltage on live data stream when the car is RUNNING . However , the TPS on my Chevy has to be adjusted to .55 volts when NOT RUNNING , like in the video . I cannot read voltage on the scanner with the key on , engine off . I borrowed an old Snap On MT 2500 and you could adjust it . But not on the Actron . I even called them twice and they weren't sure . Unless I am missing something ? Let me know if you have done any pre 1996 GM's . Thanks , Bill .
@@billsmith2212 , there is a physical / manual adjustment relearn procedure for setting the base idle on pre 1996 Chevys.
th-cam.com/video/nJkPgkMpTFs/w-d-xo.html
Can you tell me the part number of that tps. I keep getting the wrong one (i think) from auto parts store. On your truck as well as mine the throttle rotates counter clockwise but the tps i keep getting cant and wont rotate that direction. It goes clockwise. Not sure why i cant get the right one. But maybe its and odd year on my truck. But your throttle rotates the same as mine so i need the same tps aw your. Comment on this thread. Ill find it.
hey do you know if these are adjustable or do you just bolt them up? my friend installed a intake manifold and is having drivability issues.i did hear you can recalibrate the throttble body do you know how?
I have the same motor, and want to test the idle control sensor harness. Do you have a video for that one? I want to learn how to do that.
2001 Grand Prix with a 3.1-liter motor, started idling high after good and warmed up. No codes at the time.
When motor would idle too high, 4T65E trans would shift super late under light throttle. About 25 MPH and 2,500 RPM before it would hit 2nd. gear. Was OK the next day. 3rd. day, high idle and late shift again! This time the check engine light did come on. Code P0121. Scanner TPS angle percentage at idle shows 0 sometimes, and sometimes 0.39% and ~ 100% at WOT. One time while sitting there idling fine, ~ 700 RPM, all at once the idle kicked up to ~1,300 RPM all by itself. I looked at the scanner, now TPS angle percentage went up to 2.75%.
From my readings it looks to me like the sensor IS receiving the 5V reference, and my ground in good, and my reference voltage is changing and being sent back to the ECM. My voltmeter is at my buddy's garage right now, so I could not do the voltage testing at the TPS connector, as you have outlined.
I'm ready to take a chance based on my findings, and just install a new TPS.
What do you think?
Reply
Thanks
Does it also apply to 4.9 Cadillac?
how do you replace this on a 2002 chevy trailblazer i have a brand new throttle body in it but still getting the throttle position sensor
It’s pretty simple if you haven’t done it yet you disconnect the negative wire to your battery then you have two Allen bolts that you unscrew from the tps sensor and carefully take it out and replace with the new one
I have a 94 Sonoma 4.3 Vortec. Changed tps, IAC , full tune up. I still have erratic idle and will rev really high at start up like over 2000 rpm but put it in drive it goes down. Tried resetting comp but still same issues. Any suggestions? Maybe bad computer?
Any luck?
@@DIXIEMAFIA251 I reset the computer again by completely unhooking it. Hooked back up the next day and it ran great for a couple of days. Then went back to the same. I’m going to be getting a new comp soon as I don’t drive it much because it’s a low rider that’s all bagged. I’ll definitely keep you updated after I buy it and install it
Been having an intermittent low issue causing hard shifts, randomly hesitating on acceleration the whole shebang I’ve tested 3 different sensors and a new one all with same results dunno if I should find someone with a dvom or try another new sensor
Did u find the problem? Bad pcm?
I replaced the TPS on my 12 GMC Sierra 1500 and now it’s saying low voltage. Any ideas please
if you didnt have that code before then take it back and get a different one. chances are you got a bad one.
You need an alligator clip
What year truck was this
94
What is the reading for the ground test? Mine was 1.43
the procedure was flawed, you cant do ohms testing on a live circuit as the way your meter works is your meter injects voltage into the wire to determine the ohms.you only do this ohms test on ground wires on non live circuits to determine if it has a path to ground which isnt a good test either we always want to do loaded circuit testing to stress the ground,.instead you switch to mv scale and it shouldnt exceed 100mv on a low amperage sensor circuit.you will typically see under 0.020mv on a good ground,if you see hundreds of mv or volts or OL on meter you have a voltage drop issue on the ground wire,if you see 5v you have no ground. if you want to learn more about this stuff follow scannerdanner.
can a faulty TPS cause a VERY intermittent limp mode issue?
Check the 5v reference line for short
Shouldn't voltage be other way around on the reference from computer .01 then go up to .5 as you open throttle plate with
No about .5 to about 4.6 volts.
what year and truck was that
94 s10 blazer 4.3l vortec
If TPS is going bad or messing up or bad does a code come up??? which code? thax i have a 4.3 blazer running like horse shit...i tried everything...no codes...Idles great but hesitates and bucks if i give it gas while driving..
check fuel pressure.
@@bam6972 it's seems good around 60...I did have a bad connection to maf and fixed.seems better...but I am thinking running some good fuel injection cleaner through it may fix it even more...but I also ordered a tps ...I believe it's a combination of issues that is causing problems...I bought it from a jackass,so I have no idea of the trucks history...thanks
@@roadstar499 new spark plugs might be just the trick. Good investment, if it doesn't work...
@@TheFinney12345 or wires
Can a bad TPS be a cause for crank but won't start?
I would check if you have spark and fuel, bud.
A bad 5v reference, no fuel,
no spark Or bad timing.
Bam Bam, what do you do for a living? Also, don't they make a tool for that?
your ohms test was wonky because you did it on live circuit which give false readings since your meter injects voltage into the system to determine the ohms,testing live grounds just put on mv scale instead you shouldnt exceed 100mv on a low amperage sensor circuit.ive done this mistake before as well and i use ohms to determine if i have path to ground but not loaded circuit testing
of theirs a ground issu hoebdo you fix it , ? buy a new thro..body...?
find the bad ground and fix it.?
On my 3rd tps on a 93 Buick. Wtf? 😏
your black test cable is getting bad
I dont have a meter
you can get a cheap multi meter at Walmart. under 20 bucks
bam6972 cool thanks
+Alfred Oropeza - at Harbor Freight only $2.99 LOL
A
Too much camera movement. Never holds steady. making me seasick.
Try Gravol.
Agreed lol drank a little too much too