Kinked_Chrome Posted October 14, 2002 Share Posted October 14, 2002 My LT1 project is complete, except the thing won't start. When i first tried to start it, the thing fired right up and everytime after that. Then I fixed my brakes, built my exhaust system switched from ramhorns to block huggers, installed my O2 sensors, and did some other stuff. Now it won't start at all. It sounds like it wants to, but then gives up. Sometimes it will start but not nearly consistently enough to drive. I had the VATS, Smog, etc, programmed out. I hooked it up to a scan tool and had one error code. ECT sensor sensed low temperature, -40F. Fixed that (metal sleeve pulled out a little bit on the connector to the computer). Still doesn't want to start. I have run out of ideas, and have absolutely no idea what is wrong. I tested for spark and I got spark, I can smell the fuel (I think maybe to much, but I can't adjust it), and i'm getting air; so what gives? Can I trick it into starting? Any advice would be greatly appreciated. Quote Link to comment Share on other sites More sharing options...
Guest the_dj Posted October 14, 2002 Share Posted October 14, 2002 Put the gas to the floor and crank it for 10-15 seconds. That is a clear flood position and NO gas will go into the engine. Try to start it again after that. Quote Link to comment Share on other sites More sharing options...
drexel_j Posted October 14, 2002 Share Posted October 14, 2002 When my 95 Impala burned the coil wire in half at 50K the shop said it was the Optispark, I put on a new set of MSD wires and still it wouldn't run. I changed the Coil Driver module (it is the little module that is mounted right above the coil) and it's worked great ever since. I have a 1994 Camaro LT1 that seemed like the fuel pump went out and we changed that and it ran for a while, but a little latter it stopped running again. Took it to a shop where they said it was a bad Optispark and computer. When we changed the Optispark and it would start but ran worse than before, as in starting but immediately dying. We changed the oxygen sensors, plugs, and still nothing. I changed the coil driver module and it has run great ever since. I think they are quite sensitive and if something happens in the electrical the just give out. No shop I have ever been to has ever recommended changing this out. I think I will keep a spare one. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 15, 2002 Share Posted October 15, 2002 Another thing to check for is to make sure you have spark when cranking and not just when the ignition switch is in the on position. Ignition relay must be connected to a wire that is hot when in the on position as well as in the cranking position. Did you do any rewiring or disconnect and reconnect anything? This has ahppened to me also. You will figure it out. I would also try the ignition module if all else fails. Good luck, MArk Quote Link to comment Share on other sites More sharing options...
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