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[quote]"5 pulses per wheel revolution is right for stock Subaru-sized tires, so I guess your Vanagon's tires are similar in diameter to ours? " [/quote]

I think me overall diameter is about 25". But I thought the Subaru VSS was a 4 pulse per revolution, But I guess I was wrong. So we must have ...

Just to follow up and close this thread, I finally fixed it. It is a unique problem to my vanagon conversion, but you might appreciate this info.
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I kept getting error code 24 (IAC). MT/AT grounding pin didn't matter. What fixed it was the Speed sensor (VSS). I hooked up a 5 bladed sheet metal ...

Well, the code 24 showed back up after extended driving. I haven't had a chance to really trouble shoot it or make the VSS. So it's still an open issue. It only gives my 24, desipe the fact that it stored 33,51,52 before....?
I keep you posted after I make some progress.

Thanks

I have thought of doing the same for mine to get thru smog.
I was going to use the accesory voltage to turn it on, then use the "start" wire to the ECU turn it off, plus the optional second delay, just for kicks. I was thinking of using a simple 555 timer circuit. Accesories would tigger the LED ...

Vikash and Josh...I'd really like to thank you 2 for helping me! I grounded the transmission ID pin and the computer stopped flashing the IAC error code at me. It baffled me for weeks.

Everthing else fell into place because now I have errors #33, 51, 52...why would I be happy about those, you ask ...

I like where you are going with this....
Man, I may have to leave work early now!

Yes, it a 91 NA Auto...but I have B48(pin D20) unconnected to change it to Manual..like my van.

Thanks..I'll check tonight, but I think I have everything wired correctly. And I seams to 'work'....just the CEL giving #24.

My wiring harness was from the same car as the computer (91 EJ22), I never met the car, kind of a long story. I'm not sure you want to know, but to give you an idea, I have a JDM Short block, U.S. ECU and all sensors, intake, and my wiring harness from the orginal car is pretty much just the plugs ...

I guess the more direct questions is what is the Part number of the IAC I should use with a (22611 AA 383 F) '91 Auto ECU.

I have a 22650 AA 032
and a 22650 AA 033

The computer complains about either one. Is my problem a matter of finding a matched set? My setup is a frankenstein, so I'm not sure ...

I have a brand new Temp Sensor installed. And my laptop shows a good temp. I know those little temp sensors can really swing the performance, that's why I got a new one.

I'm currently designing a simple circuit with a 4 pronged metal plate that I will attach to the VW speedo cable behind tha dash ...

Hi, this is my first post. I have a 91 Legacy EJ22 in a VW Vangon. It's a great engine, and I would be driving it everyday, but the emissions referee here in Cali won't pass me with my one error code....code 24 (actual smog numbers are great). I have read many post about the IAC here, and have ...