pwmin Posted February 7, 2021 Report Share Posted February 7, 2021 I finally got my L67 top swap done on my 99 Grand Prix GT, but I'm having an issue that I can't figure out with the MAP sensor. I followed the vacuum diagrams that I found for the swap and fixed a leak that I found. I got it running with the L36 MAP temporarily and it would start and run fine for at least a half dozen times, but then it decided it didn't want to start sometimes. So, I hooked up an L32 MAP and it was producing the same issue. Unplugging it would allow the engine to start every time. I thought maybe it was the MAP, but after installing another one it starts every time. Problem is it's defective and constantly reads the same kPa and voltage. I also tested the other L32 MAP and it reads 5V input and reference voltage decreases when applying vacuum. Why would it start every time with a bad MAP but not with one that's testing okay? Also, I am trying to make an adapter harness to run an L67 MAP so I don't have to cut the factory L36 wiring but I'm having trouble finding the female connector everyone uses for their adapters the sell, like ZZP, Casper's and others. Casper's hasn't been able to help me so far. Anyone have a part number for it or knows where to get it? Quote Link to comment Share on other sites More sharing options...
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