All,
I have a 90 Gt that I have completed a top end rebuild on. All new gaskets and hardware. When I got the car done it had a hell of a surging idle. Cleaning of the 10 pin connectors finally tamed that down to an acceptable level. The car has always had a code 66 for MAF voltage low since I have had it.
Here is the issue. The wiring for the MAF is good and shows no resistance to the computer. The signals all check out based on the surging idle checklist numbers. The power and ground are good. This is a new MAF stock replacement. The one on the car when I got It was also a stock unit. I replaced it to make sure that was not the issue and it was not. The MAF operates and raises voltage based on throttle as it should. I am banging my head against the wall trying to figure it out and need to see if someone else has had this issue.
When I unplug the MAF connector the car runs the same. The car is in FMEM and will not complete a KOER test. Every time I clear the KOEO codes and start the car the code 66 comes back. Could the computer be fried on the MAF circuit? Someone please give me some advice. Also, I am not beyond the thinking that there may not be enough fuel pressure and it is making the MAF run haywire. But I am not sure that would cause this or not.
As a side note on the condition of the car when I got it, everything was basically wrong. Firing order was backwards, intakes leaked, timing cover leaked, unplugged vacuum lines, the works.
I have a 90 Gt that I have completed a top end rebuild on. All new gaskets and hardware. When I got the car done it had a hell of a surging idle. Cleaning of the 10 pin connectors finally tamed that down to an acceptable level. The car has always had a code 66 for MAF voltage low since I have had it.
Here is the issue. The wiring for the MAF is good and shows no resistance to the computer. The signals all check out based on the surging idle checklist numbers. The power and ground are good. This is a new MAF stock replacement. The one on the car when I got It was also a stock unit. I replaced it to make sure that was not the issue and it was not. The MAF operates and raises voltage based on throttle as it should. I am banging my head against the wall trying to figure it out and need to see if someone else has had this issue.
When I unplug the MAF connector the car runs the same. The car is in FMEM and will not complete a KOER test. Every time I clear the KOEO codes and start the car the code 66 comes back. Could the computer be fried on the MAF circuit? Someone please give me some advice. Also, I am not beyond the thinking that there may not be enough fuel pressure and it is making the MAF run haywire. But I am not sure that would cause this or not.
As a side note on the condition of the car when I got it, everything was basically wrong. Firing order was backwards, intakes leaked, timing cover leaked, unplugged vacuum lines, the works.