theastronaut Posted September 13, 2014 Author Report Share Posted September 13, 2014 (edited) Both were stock, the one I took off hasn't been crushed at all. I swapped to another (untested) secondary injector and it completely cuts off over about half throttle, same as if it is unplugged. Edited September 13, 2014 by theastronaut Link to comment Share on other sites More sharing options...
StarquestRescue Posted September 13, 2014 Report Share Posted September 13, 2014 (edited) Maybe the 50 psi base is gauge error? Did you try disconnecting the ecu coolant sensor plug? That is the quick fix for a sensor that is sending a fause cold signal to the ecu and making it run rich. Edited September 13, 2014 by StarquestRescue Link to comment Share on other sites More sharing options...
theastronaut Posted September 13, 2014 Author Report Share Posted September 13, 2014 Could be, I haven't checked the accuracy of the gauge. Will do that. Haven't checked the ECU temp sensor. Link to comment Share on other sites More sharing options...
JAinsworth Posted September 13, 2014 Report Share Posted September 13, 2014 Your fuel pressure should be around 38 psi at idle and increase one pound for each pound of boost.Jimmy Link to comment Share on other sites More sharing options...
theastronaut Posted September 13, 2014 Author Report Share Posted September 13, 2014 Checked the fuel pressure gauge against the gauge on our air compressor... it's accurate. I have another used FPR and secondary injector that I will try tomorrow. Link to comment Share on other sites More sharing options...
theastronaut Posted September 14, 2014 Author Report Share Posted September 14, 2014 Swapped the secondary injector out again for another and it's running great again. No stumbling or cutting out. The original secondary must have been clogged or on its way out. The idle is slightly pulsing now, not all the time though. It did it at maybe half of the redlights I stopped at on my way home, idled normally at the other half. Was idling fine once I got home. Link to comment Share on other sites More sharing options...
StarquestRescue Posted September 15, 2014 Report Share Posted September 15, 2014 Good. The regulator that you saw the pressure drop with is still suspect though. Look in wether your isc is working and or "reset" to improve the idle. Link to comment Share on other sites More sharing options...
theastronaut Posted September 18, 2014 Author Report Share Posted September 18, 2014 FPR has been swapped for a good working used regulator. Have driven it all week with no issues, idle settled down after the first drive and has been perfect ever since even with the AC on. Fix was: FPRSecondary injector. Vacuum advance can. Link to comment Share on other sites More sharing options...
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