1990 Lumina 3.1 wont start. It was hesitating or stumbling for a few days, and finally stalled out one day while driving. Started right up the next day and stalled out when fully warmed up. Now it won't start at all. I have fuel pressure, I have spark, I don't seem to have fuel at the injectors. I removed a spark plug while someone cranked the engine, no fuel odor, plugs were dry. I replaced the Ignition module and coil packs, no difference. I replaced the ECM, no difference. The crankshaft sensor was changed 4 years ago.
Assuming the crankshaft sensor is operating correctly, what would cause the injectors to not fire? Unfortunately, the injectors on this engine are under the plenum. So it would take some time to get at them. I am stumped. Many other sensors have been recently changed. MAP, ECT, TPS, IAT, plugs and wires. It ran great before this.
have the same problem?
Thursday, May 5th, 2011 AT 2:45 AM