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Is that the way these things go - only find out at startup - or can they die while the motor is running, too?

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the ones I've had go bad started misfiring on multiple cyls as soon as I started it up & had to gun it to limp it home & people thinking their hearing gunfire or firecrackers

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I had an Orange box that would cut out with no rhyme or reason while driving. This one time it cut out, it fired back up before I had time to react while cruising along at almost 70MPH......

My ears rang for a few days.

As an aside, this was an old(er) Orange box from the late '80's (if I had to guess). By the time it started cutting out, it had logged well over 100K miles and had been on at least 4 different cars.

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Just wanted to add, make sure the ECU has a good GROUND. A poor ground will shorten the life of an ECU too. On my drivers, I run one of those braided ground straps from a mounting bolt on the ECU to the engine block.

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Is the voltage regulator suppose to be grounded also and not loose to the firewall or does it make any difference ?

logan426

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Yes, the voltage regulator must be grounded. Also be sure to sand off the paint on its back side so it is metal-to-metal when titened down...

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Do you mean to sand the firewall where the ECU/VR are mounted? I think I remember that the back of the ECU is just plain steel??

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Do you mean to sand the firewall where the ECU/VR are mounted?

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