1991 c4 injectors won't pulse
09-02-2011, 11:12 PM
#1
Heel & Toe
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1991 c4 injectors won't pulse
the injectors on my 1991 L98 TPI won't pulse. here's what I've done so far. 1. replaced pick up coil. 2. had ignition control module tested(it was good) 3. Replaced TPS 4.checked resistance of injectors(all read 16.7 ohms except one it read 15.8) 5. checked for 12 volts at each injector harness. 6. checked for 12 volts to the ecm 7. disconnected the 4 pin connector at the distributor and probed the purple and white reference wire to make the fuel pump come on for 2 seconds. 8. jumped the A and B terminals at ALDL to check for code 12(code 12 did flash and no codes followed) Does anyone have any ideas what the problem could be? All the tests I've run seem to rule out injectors and ecm. What am I missing? HEEEEEEEEEEELLLLLLLLLLLPPPPP!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!
09-04-2011, 11:02 AM
#2
Drifting
the injectors on my 1991 L98 TPI won't pulse. here's what I've done so far. 1. replaced pick up coil. 2. had ignition control module tested(it was good) 3. Replaced TPS 4.checked resistance of injectors(all read 16.7 ohms except one it read 15.8) 5. checked for 12 volts at each injector harness. 6. checked for 12 volts to the ecm 7. disconnected the 4 pin connector at the distributor and probed the purple and white reference wire to make the fuel pump come on for 2 seconds. 8. jumped the A and B terminals at ALDL to check for code 12(code 12 did flash and no codes followed) Does anyone have any ideas what the problem could be? All the tests I've run seem to rule out injectors and ecm. What am I missing? HEEEEEEEEEEELLLLLLLLLLLPPPPP!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!
