Put my scantool on my firebird today and I have these codes: 2.8v6 mpfi.

23, 32, 34.

23. My MAT is definitely bad. It reads -40C all the time. Where is this sensor located? It's in the airbox, correct?

32. EGR. I don't know anything about EGR. I don't have it on my 84 because I built the motor for it. So what do I do / look for?

34. MAP. Seems to be an intermittent problem. My scan tool can't tell me anything but that it fails a "HIGH" check. Where is THIS sensor?

Thanks! BTW, my symptoms are: VERY VERY rich at times.

Status of other sensors:

O2 -- checks out perfectly
TPS -- checks out perfectly
MAF -- checks out perfectly
CTS -- checks out perfectly

IAC -- a little high. Should be about 25 at idle and I'm getting 40-45? No load of course.

I need a little guidance, please



[This message has been edited by c55 (edited November 02, 2000).]

 

C55,

Waht year/engine do you have? The information you are listing is conflicting. You can't have both a MAF and MAP sensor on a 2.8L V-6.

On MAF cars, your MAT sensor should be located in the intake ducting, right in front of the throttle body.

A MAF car also uses code '34' to indicate low MAF flow, not high MAP pressure. If you have a crbureted or TBI engine, the '32' will be for a high pressure at the MAP (low vacuum).

If the ECM doesn't sense an electrical load from an EGR solenoid, and the MAP sensor doesn't change when the EGR is commanded open, the ECM will set a DTC 32. If you don't have an EGR valve, you'll have to connect a dummy load to the ECM and try to devise a way to alter the MAP sensor when the EGR is supposed to be open (good luck).

------------------
Later,
Vader
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"Make Me Bad"
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