TPS test and change, T25 Torex, K3500 Chevy 350 5.7 TBI, IAC, Throttle Position Sensor repair, 1995

[@saltyraptor5681]

I was having the same problem,as you said and very important step,never replace especially in those parts aftermarket parts like e Bay or Amazon,I known it's way more cheaper but they going to take you to wrong dignostic and its going to make you crazy,, good video and thanks for sharing,tbi it's a really tricky system

[@terrydoberstein6742]

1st truck video where it has both of the extension seals 25511809(top/bottom) on the air filter plate to the throttle body.

[@brandonrayner5253]

I actually just rebuilt my throttle body and I was trying to figure out why it didn’t have two so I ended up making one from a felpro karropak roll I had

[@robmcdonald9681]

3/4 into the video, you said "crank the bell housing all the way forward". Explanation please???

[@thisishowweroll3610]

I had a problem with ac delco. Had to inlarge holes to adjust it.

[@benjaminpomeroy551]

did you have surging or rough idle with the bad tps??

[@timmytomtimithjr8522]

I have a 94 K2500 454 BBC. It was running great then all of a sudden one day it started having problems accelerating with some lag and it would take forever to shift and when it did it would jerk pretty hard. Took it to a mechanic and they brought up a code for the TPS and wanted to charge me $190 to do it. My mind was blown because of how easy of a job it is, so I bought one from O’Reillys and replaced it myself. Read the owners manual for my truck and it pretty much just says it’s a plug and play, no calibrating or anything. But I’m still having issues ! Same issues… idk what I did wrong or didn’t do. It was a simple electrical connector and two torque screws.. Anybody have a clue??

[@randy1ization]

I hope this is my problem, im sick of these erratic idle problems.. surges, the levels out, then high idle, then levels out , then surging . ive replaced the IAC, rebuilt throttle body replaced TPS , replace coolant temp sensor, checked for vacuum leaks, set base timing, im running out of things to check. .. how can u tell if the tps is adjustable.. mine has the oval shaped plug, not the round one

[@pedrorojascervantes3928]

There's a base idle relearn procedure. Basically short out the two pins on the OBD port with a wire / paperclip & then adjust. kzbin.info/www/bejne/pHvOgZqhgtWHfNU

[@brandonrayner5253]

I was having almost the same problem, I replaced the IAC, cap and rotor, plugs and wires, rebuilt the throttle body and nothing else was working. I ended up replacing the oxygen sensor and my problem went away

[@randy1ization]

@@brandonrayner5253 yes the 02 sensor regulates fuel trims once the engine goes into closed loop, it will usually fail rich,,

[@justinoakes7421]

its i a c and e g r not aic and.erg lol

[@randy1ization]

these truck will drive you apeshit crazy!

[@damonsteele6279]

thanks for the tips

[@andrewhare8513]

Were there any other symptoms like a rough idle or loss of power

[@tammylilly8048]

Andrew Hare

[@tonyd3266]

many other issues - one was a shot distributor shaft. wasnt too bad to replace the whole distributor. that and new plugs cleared up the rough idle.

[@tonyhernandez6694]

does that sensor have a gasket??

[@soburnedout]

Truly, a great video. Including the tip on how to modify a shitty TPS was rad. Rearranging the acronyms, (of which there are way too many!!) and calling the throttle cable the ‘bell housing’ added some much welcomed comedy to an otherwise ultra frustrating mf pos old-meets-new tech, ShitShow of GM mashup engineering ass-hattery. And after hours of reading others issues, with so many different, but sorta similar fixes…dammit. I know I’m not alone, and it gives me zero comfort…

[@bvandme]

As far as genuine A/C Delco parts, that's a laugh, last MAP I bought was made in Taiwan so there's that

[@randy1ization]

senior esss no true.. many made in meckico.

[@tonyd3266]

its more about quality control of ACDELCO. yep hecho en mexico sometimes, but the volt signal will serve you better. its not just volts but also amps and expected linear response.

[@fabianguerra9731]

I have a 92 GMC Yukon and when I'm in park and go to reverse the rpm drops then goes back up, does anyone know what the problem could be

[@richardbarclay7998]

Same problem does it stall at a quick stop. Not all the time but erattically

[@wyattdavis2466]

How did you replace the IAC

[@michealsanders7817]

Unscrews from throttle body

[@tonyd3266]

yes

[@oldbiker9739]

Did you do an IAC reset when you reinstalled the TBI? Disconnect battery to clear codes, reconnect battery, jump A&B on ALDL connector, turn key on for 30 seconds or so, turn key off, remove jumper from ALDL connector. What happens when you do this is the IAC pintle will extend full-closed and stay there until you turn the key off. At that point the ECM assumes it's closed and has a reference point for any commands it sends to it from there on out. Good video thanks ,I just fixed my truck runs great now . kzbin.info/www/bejne/Y3Onhqh-mKmkjZY

[@tonyd3266]

Thanks for adding that. I was doing that reset on at least a weekly basis.

[@christoperun4380]

Yuuup.. those eBay cheap parts are a complete waste of time! 2 for 2 bad parts, on a van motor cost me about 4 hours of extra time and frustration. So not worth it