Question on how to replace TPS on a 94 Q

[richardchen0530]

Hey guys, i tried to change the TPS today, but some how after i disconneted the wires and the 2 bolts, i can't take the TPS off, anybody know which angle i shall twist to get the TPS off? Seems like it has to be a certain piont that i can take offThanks a lot guys

[elwesso]

If you giggle it while you try and slide it off, it will come.....

[Yimu]

Thanks for the reply:)i will try that tonightso after i replace it, i shall measure the center connector make sure it's with the range right?

[Q45tech]

Why are you changing TPS? or is this secondary auxillary TPS with TCS system?

[Yimu]

I am changing the TPS coz seems my car is not idling really well during start. TPS had a history b4 and i replaced with a used one, when TPS was bad, the car had black smoke and very rough idle. Then when i replaced with a used one, these problem got away but the idle started to be fluctuating just when i start the car. It will fluctuate and then everything is fine after 5 sec, also feel the vibration under my seat when i shift to D, however this vibe will go away when i shift to N or Pany ideas tech?

Really need your advice

thanx a lot

[maxnix]

Probably need the rear motor (transmission) mount replaced.

If you read all the posts by Q45tech, 98% of your questions will be answered.

[Q45tech]

Primary TPS doesn't usually fail [connectors can be corroded or the unit misadjusted] and never causes black smoke [that's a MAF or MAF connector].

[goody90q45]

Have you checked for corrosion on the connector pins? I just purchased a 90Q that was searching for the correct idle from 100 rpm to about 1200 rpm for about a minute before settling in at 650 rpm. If I put it in gear before the idle settled down the engine would stall.

I cleaned the MAF connection and the MAF interior (sensor wire) with brake parts cleaner, the CAS connection, and the 3 injector connectors that you can get to without removing the plenum, and the searching idle went away. It was probably the dirty MAF connection that was the issue.

All of this took less than 30 minutes. Give it a try. Good luck.

[richardchen0530]

I always try to wiggle the MAF connector but seems it's pretty good shape, just cleaned the MAF and nothing changed, however, the car tends to get this kinda problem during warm, when it's cold, it seems fineKinda weird

any suggstion

Thanks