Chevrolet S10 Problems

Oil-soaked spark plug wire rubber boots can cause misfire or rough idle on Chevrolet S10

Problem Description and Possible Solution

The spark plug wire rubber boots may get soaked with oil, causing a misfire or rough idle.

(7 people reported this problem)

Chevrolet S10 Vehicles With This Problem

RepairPal Verified
Average mileage: 136,861 (110,000–160,583)
Engines affected: 2.5L 4 Cylinder, 4.3L V6
4 model years affected: 1990, 1991, 1992, 1993
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Viewing 1-3 of 3 comments
We had a compression check done and the compression is fine but the number 1 spark plug has oil all over the boot, I guess its called blow-by. Just found that issue last night, so far we have replaced the computer twice, the distributor, sensors, fuel tank, fuel pump, and still the check engine light comes on and it runs rough. We are thinking about replacing the wiring harness and if we dont have to I'd rather not have to.Anyone with any thoughts?
I had a heater pluged into cigg lighter, and I smelled and seen smoke comeing from dash.I ripped out cigg lighter socket with wires and then my truck died.when I stsrted it back up it ran so bad it would not stay running and it back fires what could I do to fix please help im getting no where and its cold
after soaking engine compartment with brake fluid (I forgot to put the cover back on when bleeding the brake line, and it sprayed all over) the truck ran rough and even stopped.