Originally Posted by LigHtEmUp01
its in my sig and i know i dont have any exhaust leaks and both temp sending units are brand new.
Brand new sensors means nothing. Scan the PCM and see what temperatures its seeing. You could have a broken wire or bad connection. The sensor in the water pump is all you need to check, the one in the head is only for the dash gauge. And check the fuel pressure. If you don't have a scanner many parts stores will rent you one. Same for the fuel pressure tester. You actually buy it and they let you return it after using it. You can also check the injector pulse timing while your at it. The fuel pressure test port looks like a AC fitting on the fuel rail. Should have around 43 PSI with the engine off and it should go down a bit when you start it. If the pressure leaks down quick it's a sign of a leaky injector, bad regulator or bad fuel pump. I wouldn't worry about that unless it's fouling one or two cylinders. If they are all black it's not an injector problem.
Post what you find.
Worked on tuned port 350 yesterday that had 110 PSI on the rail. The regulator's pin was bent over. Don't ask me how, but that's what I found. It was running rich and somehow showed no codes??
Al 95 Z28