engine still missing while running. I am lost. Any ideas?

2001 CHEVROLET SUBURBAN
164,072 MILES
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LIMBWALKER42083
  • MEMBER
  • 1 POST
I recentley bought a 2001 Chevy Surburban.I have replaced the plugs, wires, and coil pack. Also oil change. I test ed the compression, it was the first time I have ever ran this test, however Im sure I did this properly. It is still missing while running. I am lost .Any ideas??
Oct 14, 2013 at 5:55 AM
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KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
Misfires are either ignition, fuel, compression, or air related.

So, if we start with finding out what cylinder is misfiring, we will have a better idea where to start.

Here is a video that helps with this:

https://youtu.be/QTE8k06MzwQ

We can also check for codes.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Next, we do need to check the compression so let's run through this guide and make sure this is how you did the test.

https://www.2carpros.com/articles/how-to-test-engine-compression

Depending on how many cylinders are misfiring can be fuel related so let's check the pressure as well.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Let us know what the readings are from all this, and we can go from there.

Thanks
Jan 24, 2022 at 6:06 AM
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