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no spark 1990 chevy 454 tbi?
no ignition spark on a 1990 Itasca motor home with a chevy 454 . I've all ready replaced the ignition coil and control module. I've got 12 volts to the coil and tach lead, and 12volts to distributor. the engine will roll over fine but no fire even out of the post on the coil. I don't know what else to do or look for! I even checked the codes in the computer and just come up with 1-2 (12) which I understand to mean no codes and the ecm is functioning correctly. Any body have any suggestions? I'll buy you a coke if it works!
come people the cap and rotor is the first thing I changed!!I said i'm not getting fire from the coil (remotely mounted coil) that has nothing to do with the cap and rotor. The distrubutor has'nt been removed since the new engine was put in 30k miles ago. theres something simple I'm misssing on this. I'm no spring chicken when it comes to working on this stuff. Ichecked the abvious first.
4 Answers
- ?Lv 51 decade agoFavorite Answer
If there is no spark from the coil, check the triggering mechanism. You already replaced the control module. I'm not familiar with this engine, check its other sensors that triggers the coil. Connect a test light to the negative side of coil and it should flash when cranking indicating triggering.
- fire_inur_eyesLv 71 decade ago
Rotor and cap need to be replaced---and the wires in the proper order. Short of towing it in to a good repair shop--I have no idea what to tll you. Could be bad gas--or NO GAS being delivered from the tank. There are fuses that are involved--maybe a fuse (RELAY) is bad--even the computer may be bad!! A shop is REALLY the best option.
- wayneLv 51 decade ago
Did you lift the distributor,and remount it if you did it will have to be retimed the
V8 will never start unless you do that.Also recheck you did not forget a nother wire
attachment to the distributor.
- Anonymous1 decade ago
Replace the cap and rotor. Duh.
