Compression Ignition Addict
Join Date: Jul 2010
Location: Falls Chruch
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That could be old oil, bad gas, time for a filter change. Lots of little things could cause that. Is it a big deal or just something that only you notices because you know the vehicle so well?
You could have a bad #8 cyl, but i dont think you do and until the problem gets so bad it causes other codes, i wouldnt worry about it.
One thing i would do though is add a fuel pressure gauge. Fuel pressure is not monitored and its very important
Nonconformist. Functionality over bling.
My three rules for 7.3l troubleshooting: 1) Replace CPS and keep a spare. 2) Replace FPR and know your fuel pressure. 3) Hook it to a scanner and check for codes.