Guest 2slo4u Posted August 14, 2004 Share Posted August 14, 2004 Hi guys and gals. I've done the 280zx to 300zx ecu swap and the car works pretty darn good. Only thing is I have a miss at idle and up to a little over 1500rpm when accelerating or even just revving the engiine. After asking a few questions on hybridz and looking over the engine a few times, it makes sense it could be a lean condition. Only thing is: -It's got new turbo injectors and the lines and tank are flushed out with new filter. -No injector resistors so they should be getting full power to open fully -Fuel pressure works as specified from idle to boost 38psi to 46 I dont want to tamper with the Mass airflow sensor, it seems it would provide enough signal to the ecu since it is set up for a 3 liter motor and mine's 2.8. I can't find any more vacumm leaks, but there might still be one hiding under there. Thanks for any help. Gotta get to work now. 81zxturbo 95slobaru Quote Link to comment Share on other sites More sharing options...
cygnusx1 Posted August 15, 2004 Share Posted August 15, 2004 Look again for vacuum leaks. Use a peice of hose as a stethoscope, probe around, and listen for hiss. Quote Link to comment Share on other sites More sharing options...
Bernardd Posted August 15, 2004 Share Posted August 15, 2004 Your tps should go open about 150rpm above idle. If it's not set right you'll be in idle mode too long. Quote Link to comment Share on other sites More sharing options...
Guest 2slo4u Posted August 16, 2004 Share Posted August 16, 2004 Thanks Bernardd. I'll adjust the idle switch just like you suggested. I was confused with the way the manual suggested adjusting with feeler gauges and I just had it adjusted to open as soon as the throttle barely moves. I don't know if I had it right, but I'll try adjusting and see what happens. 81zxturbo 95slobaru Quote Link to comment Share on other sites More sharing options...
Guest 2slo4u Posted August 16, 2004 Share Posted August 16, 2004 Well I tried adjusting the tps and it still does the same thing... What the heck? I even tried with the tps totally disconnected and it still has the hesitation/stumble. One thing at a time I guess. By the way, Bernardd, does yours hesitate at all? Is there anything different about my setup from yours that could be causing this? -no injector resistors -all soldered no crimps -I hope the mas is cleaning itself, I wouldn't know how to check -Intake and exhaust manifold bolts all tight, none have loosened ????????????? 81zxturbo 95slobaru Quote Link to comment Share on other sites More sharing options...
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