why do i need a TPS?

[zaderian]

just as the title says do i really need a tps? the car hesitates on acceleration, but but it seems to get rid of the little random misfire problem i picked up when doing the 6 bolt swap into my 2g. The main point im wondering is, am i going to hurt anything by leaving it unplugged?

 

[hubz91talontsi]

Throttle postion sensor.... Sounds important to me.

 

[zimfro]

as I understand it, your TPS is your throttle position sensor. You really do need this sensor. Without it, your car should act quite strange. Are you sure you have your TPS unplugged? Maybe you are calling your unplugged sensor the wrong name.

 

[zaderian]

im pretty sure its the tps, its on the front of the throttle body and has 2 bolts you can loosen to adjust it. it also has a 4 wire harness. sits opposite of the throttle wheel that the throttle wire attaches too. is that right? and the car doesnt run terribly just hesitates at firsts. i still have the unanswered question of will it hurt my motor?

 

[jrohner]

If you have an auto tranny, the TPS is necessary so it knows when to shift, but on a manual you can run without it if you have to for some reason. There is acceleration enrichment, which means squirting in extra fuel with large changes in throttle; this improves throttle response and makes driving smoother and easier.

 

[steve]

The main point im wondering is, am i going to hurt anything by leaving it unplugged?

Nothing much, just acceleration enrichment, deceleration fuel cut, idle speed control, and your ECU will be in limp mode all the time.

 

[zaderian]

alright thank you guys, it seems to be fixing my random misfire for the moment so ill leave it unplugged for now.

 

[steve]

It "fixes" the random misfire by creating a higher priority problem that causes the tests for random misfire to not be checked.

 

[paultheninja]

Defiently plug it back in.

 

[DSM_PWR]

WOW

At 1st i was hoping this was one of those "Joke" threads ...

Leaving the TPS unplugged would only be a band aid to the real problem

 

[97gstnick]

You need to first find out why your misfiring. Unplugging a TPS to get your car running "better" is not a good idea. Thats what you call a "band-aid" fix. Do you have a datalogger to post up some logs?

 

[zaderian]

i really wish i did. and as stupid as it is i know its not a good way to fix the problem but i dont have any other options right now except maybe retarding my timing way back. I didnt have the misfire when my timing was at like -2.

and as far as the timing goes i have been trying to find someone to lend me a hand with that but no one i know around here can help me

 

[steve]

You need to first find out why your misfiring.

It's a 6 bolt swap into a 2G. Very common problem but often hard to get rid of.
Sometimes a black top CAS will help stabilize the timing signals. I would guess a new timing belt would also help eliminate a potential source of some of the timing jitter as well.

DSMLink or the random misfire removal from a chip will kill the problem.

 

[zaderian]

It's a 6 bolt swap into a 2G. Very common problem but often hard to get rid of.
Sometimes a black top CAS will help stabilize the timing signals. I would guess a new timing belt would also help eliminate a potential source of some of the timing jitter as well.

DSMLink or the random misfire removal from a chip will kill the problem.

ok now i know there s thread on here somewhere i cant seem to find again, but it said there was another way. something about barometric pressure?

 

[snowborder714]

It's a potentiometer. You wire in a pot and turn it until it stops happening. It's in this document at the end.

This method seems to be an ok way. The previous owner had installed one in my car and it worked sometimes. I just wasn't a fan of it at all.

 

[steve]

They drive the IAT or Baro signal out of range to again force a higher priority error than checking for misfires. The potentiometer changes the resistance/voltage from the sensor to fool the ECU.