So the car is a LS3 Camaro with a btr stage 3 cam and we just installed an ECS supercharber kit. Car runs great but won't hot start. So if it's been running a while it won't start. Once it cools down it fires right up. Any ideas where I should start?
So I tried to start it with the wide band on and nothing. It didn't even budget when the car was turning over. Fuel rail had pressure in it and the car started and ran perfect right before that.
Try startup airflow
Daily Driver= 2003 BMW 330xi
Weekend Cruiser= 2009 Pontiac G8 GT (Vararam, TSP LS3 N/A Stage 1, OBX, CTS-V converter, MagnaFlows w/ J-Pipes, 160 t-stat)
Project Car= 1991 Chevrolet Camaro RS (LQ4 w/ Gen 4 Rods, LS3 heads, turbo...)
Truck= 2007 Chevy Silverado 1500 LT LY5 4x4
Start up airflow should fix it.
Some aftermarket fuel systems have check valves in them that cause vapor lock heat soaked engine off. You can check for this by logging fuel pressure at start up. Up to about 75psi is ok. 90+ and the injectors won't open and car will not start.
Tuner at PCMofnc.com
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Start up air flow? I'll give it a try but the car doesn't seem to be getting any fuel when this happens. AFR on my wide band didn't even move. The fuel system is pretty much stock. Stock lines, stock rails with a DSX aux pump and some FIC 127lb injectors.
Culprit was the map sensor. Didn't know we tossed a 3bar ls9 map sensor in with this kit. Just had to update the tune and it fires right up
Good find
Daily Driver= 2003 BMW 330xi
Weekend Cruiser= 2009 Pontiac G8 GT (Vararam, TSP LS3 N/A Stage 1, OBX, CTS-V converter, MagnaFlows w/ J-Pipes, 160 t-stat)
Project Car= 1991 Chevrolet Camaro RS (LQ4 w/ Gen 4 Rods, LS3 heads, turbo...)
Truck= 2007 Chevy Silverado 1500 LT LY5 4x4
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