YepperCan a faulty ignitiion control module allow the truck to run sometimes, and not run sometimes (like when the engine gets fully warm)?
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YepperCan a faulty ignitiion control module allow the truck to run sometimes, and not run sometimes (like when the engine gets fully warm)?
Yes.Can a faulty ignitiion control module allow the truck to run sometimes, and not run sometimes (like when the engine gets fully warm)?
That's a possibility. They can fail intermittently, or permanently.Or do they usually just die and the truck won't start ever again?
Yes, the ICM is involved in both spark and injectors' firing. When the ECM sees DRPs (Distributor Reference Pulses) it fires the injectors. The ICM converts the sine wave signal from the pickup coil to digital signal and fires the ignition coil. So, when it fails, it can lose one or both functions.I then checked for spark and he didn't have any. I want to say he also didn't have injector spraying...i can't recall. After a few other basic diagnosing I found online I was down to pick up coil or distributor (I'm not familiar with TBIs, as I've never owned any.)
Can you hear the fuel pump run when you turn the key on?I was on the highway at about 80 MPH and my engine just quit. It wouldn't start again. I noticed no oil pressure when cranking so added oil. (Yep, only an idiot lets the oil get that low.) After I got oil in and started seeing pressure when it cranked, it still wouldn't start. I pulled the air cleaner cover and the injectors are not firing, or they aren't getting gas.
We got froze in so I haven't looked at the fuel pump relay or fuze yet. I'm wondering if the oil pressure switch going off sets something in the ECM that needs to be cleared. Anyone know?
94 Burb, 5,7 TBI 2WD
Seems that the fuel pump relay system has failed. You're running the fuel pump from the oil pressure switch. No oil pressure = no fuel, engine dies.I was on the highway at about 80 MPH and my engine just quit. It wouldn't start again. I noticed no oil pressure when cranking so added oil. (Yep, only an idiot lets the oil get that low.)
Test fuel pressure.After I got oil in and started seeing pressure when it cranked, it still wouldn't start. I pulled the air cleaner cover and the injectors are not firing, or they aren't getting gas.
Nope.I'm wondering if the oil pressure switch going off sets something in the ECM that needs to be cleared.
Wrong thread?I'd try the free thing first: idle it until it dies again then put the original coil back in. If the coil was swapped just because, then it's likely you traded a good OEM coil for a garbage Chinese coil.
Wrong thread?