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View Full Version : 1988 Chevy Caprice, Rough Idle


for the boys
10-14-2003, 11:15 AM
i recently installed an accel cap, msd blaster coil, msd 8.5 super conductor's and accel u-groove plugs gapped at .035. should i have gapped them larger as the car seems to have a rough idle at times and sometimes slightly backfires at wot. the timing is dead on and the cables are not mixed.

thanks for any help.

msdtech4
10-14-2003, 03:32 PM
for the boys,

I would recommend clearing the computer if this is still fuel injected. It could be a lean pop that is causing the back fire. This can also cause a problem with not only idle but over all driveability. Under the circumstances, I would also recommend checking the plug wires for resistance. The MSD 8.5 mm wires should be 40-50 ohm's per foot. If there is a wire breaking down that can create a lot of noise which will also create this situation.

Thanks,

MSD tech4