Hello i've been cruising these forums for a while, and did not find an answer to this question i've been having.

I have a turbo ITR motor, and have had a bad TPS sensor for awhile.
I replaced the sensor but did not adjust it untill the next day. Without the correct TPS voltage, could this cause the computer to send incorrect fuel to the cylinders and cause a lean condition?

Since I corrected the voltage the car runs ok when warm, but cold or even a bit warm it runs horrible, even throwing smoke sometimes....

Thx for any help.

 

Yes it can, but it's not likely if you replaced it and set the voltage properly. You might need a tuning session, especially if the car was tuned before when it had a bad TPS,

 

Possible. Have you tried resetting ECU after you installed new TPS?

 

Would a bad TPS sensor make the car shut off when i give it gas? Because i had a bad one for a while too. I recently unplugged it cause i was cleaning around that area. And now my car shuts off when i give it gas.

 

i'm not exactly sure which fuse to pull to reset the ecu
and yeah it was tuned before the bad tps

 

just make sure your car is off and pull the ecu plugs off. i'm a pro at that . i just set my tps yesterday and before that, it took a half tank of gas to get me from elk grove to roseville and back (45ish miles each way.)

 

actually, now that i think about it, i never brought it back out yet but the throttle response is much better.

 

If the A/F ratio is off, opening the throttle will usually make a difference in performance. Whether the effect is noticeable depends on how far it is off, how accurately/quickly your computer can read and adjust the A/F ratio, and how free-flowing your intake/exhaust is.

When you are circulating gasses better than the computer is programmed to think: If you are running rich, then opening the throttle will improve performance. If you are running lean, opening the throttle will make it worse.

When your intake and/or exhaust is more restrictive than the computer thinks, the effects can become reversed.

These situations happen because the effects of both flow improvement and flow restriction increase with RPM. Since no engine is perfect, the A/F ratio steadily moves further out of wack in one direction or the other as the motor speeds up, even if the amount of change is too small to detect.

 

i am still working on making it run better and correcting the TPS voltage. time to go drive and see if I did anything.

 

Make sure to check the output voltage when the car is running. The reference voltage can change a little from when the motor is running and when it's not and the output changes with it.

 

yeah I got the idle voltage correct i think afraid to check the WOT with the car running

 

i also reset the ECU today, by two methods I know, removing the fuse to the ecu, and unplugging the ecu
no luck either way