ChiefPyro

Hello all,

I have a 2006 Silverado 1500 4.3L V6 that has been giving me some problems with ignition coils lately. The trouble started on 5/12/12, when it appeared that my truck was having some transmission problems. It would "hiccough" while running at highway speeds for a second and then keep running fine. As the week wore on the engine began to stall sometimes idling and sometimes at highway speeds, but it would usually crank right back up. Finally, after much stalling on the highway it refused to start back up. The starter would turn the engine over all day, but it wouldn't start.

After getting the thing home and finding the time to work on it, I began tracing the problem out using the factory service manuals to discover that I had a bad ignition coil. After I replaced the coil it started up immediately and ran fine for a week...until the new coil started failing. I threw another one on there this Memorial day, but the truck started sputtering and stalling on the way to work this morning. The only code I'm getting is P0442 (Evaporative Emission Control System Leak Detected (small leak)) which is likely the gas cap.

Any ideas as to what other issues could be causing this problem?

oldchevy

Look for shorts or wiring problems. Any spots on wires where insulation is worn off or areas where wires have been cut and taped or joined?

ChiefPyro

I traced just about every wire when I was looking for it the first time and I didn't notice anything. All of the wires I was working with were still in the plastic covering of the harness. Are there any common areas you recommend checking?