40flier

I'm under the impression that these failures are unusual particularly on a low mile car? in the hours diagnosing no start/no codes I checked opti/ICM values. My multi-meter doesn't measure resistance on these coils, and most no start posts here state coil/ICM changed with no result so I was shocked when the new coil started it up.

Just another day with a 22 yr old car?

antfarmer2

Good job.

jgalfo

where is the coil on an LT1?

40flier

Bolted passenger side head below the ICS.

dizwiz24

coil failures are rare.

usually its an optispark problem.

optisparks malfunction when hot,

40flier

Yeah, the optispark boogeyman, the digital temp readout was only 204 when it died in traffic, though it did get hot a couple months ago before I put an aluminum radiator, etc in. I had just turned away from going over a 2 lane bridge after crawling for 15 min, how much fun would that have been stalled there?

I'm running some older HEI cars and have never replaced a coil on those, my local parts guy who runs a couple LT1's in various states of tune was surprised also. Wires look perfect, runs flawlessly up to red line. My Harbor Freight digital multimeter won't give me a resistance reading on either the old/new coil and gives me low values on the wires. Recommendations on a better meter?

Seems like low resistance spark plug wires wouldn't stress the coil? I do so love changing LT1 wires. I'm going to the Venice Florida Corvettes Show in March which is beyond the 100 mile AAA tow distance....