Thread: TPS problem???

Hey Andreas, sorry to bother you but i was having the same problem did you get to figure out what it can be? thanks in advance.

I think the solution may have already been presented earlier in the thread by se-riousclassic. The IACV is designed with a bi-metalic strip that is heated at startup when the engine is cold. The bimetalic strip deforms, closing a circular plate that slowly cuts off bypass air, introduced to smooth engine run during warm-up. If the IACV is not connected to the harness, the bi-metalic strip is fatigued, or the circular valve is not able to close due to fouling, it will not function correctly, and will present as poor idle, bogging or stalling, out-of-whack AFRs, etc. The is a thread that dates back to the old se-r mailing list on how to check/service the IACV.

Darrin

Nope! I already changed that. NO luck

The car gets stuck at 15 degrees timing,

Once the car gets over 150 degrees it get off of whatever map it is on and starts to work properly.

its a 100-150 degree problem. The colder it is the longer the car stays between this area. I have not looked more into it because I dont care at this moment ant time but will do so when I get the chance.

Wait a minute!

I changed the IACV air regulator, which is the one located under the intake manifold, but I have a brand new IACV air valve(the one you can control the idle) but I been lazy and I have not changed that yet. Is that the one I need to change?????

YEP! that's the problem

bump! ^^

IACV valve or IACV air regulator?

IACV Air Regulator is under the Intake Mani and is only accessable from under the car on the passsenger side. Its the one that adds air during cold startup with the bi-metal strip. Maybe this thread can help you too..

The Air Regulator will cause the car to behave like you describe. But usually it will also cause high rpms when cold too..
What is your idle rpms at cold startup?
What is your idle rpms at normal operating temp?

1200 more or less, depends of the outside temp.

Also, I changed the IACV Regulator some years ago and the problem did not go away.

this is kinda the same thing that is going on with mine, but i havnt been able to drive mine yet, did you ever check your tps voltage. i found that i was running 10:1 afr during warm up with 20 degrees timing. it turns out my tps voltage at closed tb was .70 which is way to high for closed tb, the fsm calls for .45-.55v. did you check /adjust this?