Yoak Posted June 24, 2007 Share Posted June 24, 2007 Hey Gang, I have been having a very strange starting issue with my 79ZXR for awhile now, and I simply can't figure out what is causing it. The car for the most part will start right up, but on occasions the car will need to be cranked for a good while and it will rumble around 500 rpms and die....if you give it some gas while it is at this point it will usually start right up. If you don't get the car to start within a few times of it rumbling...you will have to turn the key to the off position and try a few times...it simply will not start.... I have done allot of replacement work on the car, and I will list them below. One other note that could be related. When driving the car runs very cool for the most part, there are no issues with overheating. However, when I turn the car off and let it set, the temperature will jump considerably.... My 240z, does not have this issue... In an effort to replace all dieing parts here is what I have done. New Radiator New AFM New TPS New Cold Start Injector New Thermotime Switch New Temprature Sensor New Blaster Coil New Plug/Wires New Distributor New Air Bypass valve New EGR New Fuel Pressure Regulator New Radiator Cap New Injectors Added Rising Rate Fuel Pressure Regulator New Water Pump New Fan Clutch New Injector Clips New PCV Valve + Host Replaced Vacume Hoses Pretty much everything you can think of I Have replaced, and there is a noticeable difference in mpgs, and car performance... One final note is that as the afm is adjusted richer, the car has more trouble starting....the car is already running pretty lean Quote Link to comment Share on other sites More sharing options...
sweetleaf Posted June 24, 2007 Share Posted June 24, 2007 What is your fuel pressure at? Quote Link to comment Share on other sites More sharing options...
COZY Z COLE Posted June 24, 2007 Share Posted June 24, 2007 If this problem only happens on a warm/hot engine restart did you take the Aux. cooling fan off the engine??? LARRY Quote Link to comment Share on other sites More sharing options...
Yoak Posted June 24, 2007 Author Share Posted June 24, 2007 I will have to install a fuel pressure gauge, buy on the return line it shows around 40 psi, but I honestly don't entirely trust that gauge. My car did not come equiped with the auxillary cooling fan. Quote Link to comment Share on other sites More sharing options...
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