Guest 2slo4u Posted August 26, 2004 Share Posted August 26, 2004 My car is running lean at idle and missing. Can't find ANY vaccum leaks. I removed and cleaned the boot from the Mass airflow sensor to the turbo and it is in awesome shape, no cracks. I can't find any leaks anywhere else either. When I open the throttle, it hesitates up to about 15-1800 rpm but revs quickly after that. I can totally disconnect the tps and it makes no difference. It idles at 37psi and jumps up to 44-45psi under boost. I noticed that when pinching the return line, the fuel pressure shot up really high and the car idled smoothly, no misses. It also revs quickly with no hesitation when I pinch the return line. I guess this still sounds like a vaccum leak, but I can't find any more. This is what I have: -81zx turbo with: -85300zx turbo ecu -85turbo mass airflow sensor -brand new turbo injectors (stock) -new chts -new plug wires, cap and rotor -stock air filter housing is still being used, so no hot air into mas -300zxturbo coolant temp sensor is being used Could the problem be a bad valve job allowing the valves to seat sometimes and not seal other times? This is getting aggravating, because I'm sure it is something I could repair in an hour or less if only I knew what the problem actually was. Any help appreciated as always. Brian 81zxturbo 95slobaru Quote Link to comment Share on other sites More sharing options...
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