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Re: 99 4.3 Rough Idle, Low Temp, Bad Gas Mileage
Picked up the truck, $170 for diagnostics. I have a list of the tests that they ran.
The fuel pressure test says 54 psi no drop after 10 min. This sounds low to me, I expected 60?
The IAT failed the smoke test. (I put a new IAT in just a few weeks ago).
10" vac at PCV return hose
Bank 2 fuel trim always neg even at 2400 rpm
#4 compression 130 Dry
#4 running compression 0-50 fluctuates
Miss goes away after 2300 rpm
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