Thread: Electrical Problems(Help needed)!!!!

I noticed my car I very funny while it's hot. I got evap code boost solenoid, up stream O2 sensor, and MAF Low Circuit I replaced the MAF and I'm getting no voltage going to the MAF period. When it's put on the computer it shows no change in any of the readings. What do you guys think it is? Has anybody every had this problem?


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I notice when I very funny people laugh......and on that note lets get to the problem it is only when its hot? Ur Maf has no volts or all the time also have u tried unpluging sensors and see if u get maf voltage back or wiggling wires and when u say no volts are u checking with a scan tool or meter also what year would is it might be a bad sensor causing you to loose 5 volt ref from Pcm or could be Pcm all togeather

The car is a 99 grand Prix gtp and yes I'm using and scan tool to check the readings and there is no power going to the maf at all. And I have unplugged the maf and still no voltage. I have checked all fuses and grounds. I have tapped on the maf and changed it twice fresh out the box. Any advice will be greatly appreciated.


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Start digging,

As in find out why you have no power, start looking at the wire harness and pigtail for the maf.

ya also use a meter and ohm out the wires to the ecm and maf and see what one is broken