Chevy Avalanche Intake Manifold Gasket

Now, for something completely different. Heck, I don’t even have a category for this one. I don’t typically post about auto repairs, but my post about my Coleman backpacking stove repair draws some unexpected interest, so I thought others may find this helpful.

2003 Chevy 5.3L V8

2003 Chevy 5.3L V8

My 11 year old Chevy Avalanche, with the 5.3L engine and 158,000 miles was having trouble running smoothly after a start in cold weather. I did some research online and there were several opinions. Maybe it was the throttle position sensor or mass airflow sensor and I think a few other suggestions. Then, I read a post by someone who described some symptoms which matched, in more detail, my symptoms. The truck started fine and idled high, as expected for about 15 seconds, then it sputtered and knocked . . . sounded like it was either going to throw a rod or just die out altogether. After about a minute or so of this torture (I never timed it) it just smoothed out and ran perfectly.

The problem, according to someone   Continue reading