On my 5.3L, it has been getting a really bad intermittent rough idle and for the most part idles with aduible misfires. When I rev the engine, you can also hear the misfires. I've check/replaced everything. The only thing left is crank and/or cam shaft sensor. I did a scan and logged "current cylinder firing" and noticed that all most of the cylinders are not showing.
Attached is the config and log. Let me know what you guys think.
The correct firing order for my engine should be 1-8-7-2-6-5-4-3
the first length of numbers from this scan show
6-7-2-4-6-0-2-5-7-1-3-5-7-1-4-6-0-3-5 and on. It seems to be just random
the PCM does not transmit data fast enough to show each cylinder firing in order.
damn, I thought I had found my problem.Quote:
Originally Posted by Chris@HPTuners
Is there any way to check the camshaft or crank shaft sensor with the software?
if your are not seeing a cam or crank sensor code then it's unlikey there is a problem. If its only misfiring at idle then you probably need to check all the basics like compression, spark, coils, ground wires etc.