Toyota MR2 Message Board - View Single Post - Does anyone know how to adjust the IAC valve???

Krimzen · 03-27-2007, 09:30 PM

I got an 88 Mr2 with a swapped GZE engine. I have put on some upgrades like cams and pulleys, FPR (35 PSI), high flow fuel pump and injectors (10% higher than stock). The car is idling way to high at 3000 RPM and increased to 3500 RPMS. I also have the AFM from a Mazda RX7 installed to increase the size of the throat.

I tried putting the original GZE AFM back on and it stilled idled and ran the same way. (No Engine light)

It is when I tried the N/A AFM that the car started idling at a wobbly 800 RPM, however, the exhaust was smoking a clear whitish color and smelling alot like gasoline. Also, it finally tripped the engine light which coded out to a bad AFM.

It ran at the correct ilde with the NA AFM installed, but it ran rich and idled rough. Both AFM's From the GZE and the RX7 did not make the engine light go on.

I think I have something else besides the RX7 AFM that is messing up the idle.

Does anyone know a way to adust the Idle conrol valve on the GZE? Maybe I just need to turn it down somehow.

Is 35 PSI for fuel pressure a little to high? Could the PSI be affecting my idle.

03-27-2007, 09:30 PM	#1 (permalink)
Krimzen No Skills Join Date: May 2005 Location: Marietta, GA Posts: 65 Thanks: 8 Thanked 3 Times in 3 Posts iTrader Rating: (0/0% )	Does anyone know how to adjust the IAC valve??? I got an 88 Mr2 with a swapped GZE engine. I have put on some upgrades like cams and pulleys, FPR (35 PSI), high flow fuel pump and injectors (10% higher than stock). The car is idling way to high at 3000 RPM and increased to 3500 RPMS. I also have the AFM from a Mazda RX7 installed to increase the size of the throat. I tried putting the original GZE AFM back on and it stilled idled and ran the same way. (No Engine light) It is when I tried the N/A AFM that the car started idling at a wobbly 800 RPM, however, the exhaust was smoking a clear whitish color and smelling alot like gasoline. Also, it finally tripped the engine light which coded out to a bad AFM. It ran at the correct ilde with the NA AFM installed, but it ran rich and idled rough. Both AFM's From the GZE and the RX7 did not make the engine light go on. I think I have something else besides the RX7 AFM that is messing up the idle. Does anyone know a way to adust the Idle conrol valve on the GZE? Maybe I just need to turn it down somehow. Is 35 PSI for fuel pressure a little to high? Could the PSI be affecting my idle.