AbadK5Blaz

Ok first off I am thinking tps. When I am driving at normal speed it runs fine. As soon as I come to a stop sign or light the rpm drops to 100 to 300 and stalls. Anyone else have the same that happened or know what it is?

mike37

IAC motor

AbadK5Blaz

IAC?

mike37

the idle air control
its on the side of the throttle body to the side of the TPS

AbadK5Blaz

Ya it took a second, brain fart...anyways Ill try that too

fantic238

Mike, if the IAC is stuck totally closed, it should still idle at normal idle RPM, the stepper motor engages only at cold starts.
It sounds more of a F press problem to me.

mike37

I think your wrong on that the IAC works all the time
it just opens more on cold starts

AbadK5Blaz

elaborate

fantic238

Are you sure? Then why does it have the conical rubber on the end of the pintle with the sign of the dead end on it? I am pretty confident.
I have used a rubber hose to plug the hole once when my IAC was stuck open, it idled just fine.

mike37

it worked because it was stuck in a standard idle position
once the throttle is open over idle the IAC will close then as the throttle comes back to idle it takes over again


throttle bodies don't allow air to pass at the idle position like a carb
the IAC controls it all

fantic238

It was stuck open and idled at 2000rpm, i took the IAC off and put a piece of rubber instead of the pintle (removed the pintle from the motor).
There is another by-pass hole near the IAC by-pass that provides idle speed, where the map sensor vacuum line is plugged to.

AbadK5Blaz

So I guess the question is TPS or IAC?

fantic238

Check your fuel pressure when it stalls and clean your TB inside.

AbadK5Blaz

Thats all good. Aready replaced fuel filter, and cleaned the TB about a week ago. The problem just started today with no warning

fantic238

Did you bleed the air from the fuel line after replacing the fuel filter?
Pressure readings?
TPS voltage measurements?