Fast 92 and other upgrades. What could I have done wrong?
10-27-2013, 11:06 AM
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Fast 92 and other upgrades. What could I have done wrong? I have a 2002 Camaro Z28 with LQ9, 5.3 milled heads, MS4 cam, TPS tune, Kooks LT headers, yank 4000 stall with A4 tranny. It ran fine other than an RPM surge at deceleration or stops sometimes. I installed a Fast 92 intake, 42# injectors, Nick Williams 92mm TB, GM 85mm MAF, 160 degree thermostat, and SLP cold air. I know it will needs custom tune to run right but should it be running like this even without a tune? You have to pump the gas like its carbureted to get it to even start, then it tries to die immediately if you don't feather gas and it sounds like it's missing but might just be it loading up. It is running so rich it's smokes pretty good. I don't want to run it anymore than I have to cause I am scared I am going to float the rings. I have checked all coil packs, temp sensor, plug wires and vacuum hoses.Is there something I could have missed or just didn't hook up right for it to be this bad? Thanks for any help in advance.
10-27-2013, 11:50 AM
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You have to tune it BEFORE even starting it with bigger injectors! You are running very rich without a tune... and, it is called washing the rings, not floating them - you run it rich and wash the oil film off of the cylinder walls... you float valves, but that is a totally different issue.
10-27-2013, 11:57 AM
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You have to tune it BEFORE even starting it with bigger injectors! You are running very rich without a tune... and, it is called washing the rings, not floating them - you run it rich and wash the oil film off of the cylinder walls... you float valves, but that is a totally different issue.
10-27-2013, 05:45 PM
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Wow that's some seriously bad advice. Just put your stock injectors back in to make sure the car is sorted out and has no issues. Bring your 42's with you and swap them at the tuners. Not a big deal
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10-28-2013, 08:10 AM
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I hope I haven't already screwed it up. I put stock injectors back in now it won't crank. Just keeps turning over like timing is off or something. Do you think plugs could just be fouled or maybe I am just out of gas? It's on E but should still have enough for it to crank. Fuel rail still has pressure and gas spews out when I release it at valve stem.
10-28-2013, 08:36 AM
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I hope I haven't already screwed it up. I put stock injectors back in now it won't crank. Just keeps turning over like timing is off or something. Do you think plugs could just be fouled or maybe I am just out of gas? It's on E but should still have enough for it to crank. Fuel rail still has pressure and gas spews out when I release it at valve stem.