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Old 01-11-2009, 05:42 PM   #60
MT-2500
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Re: 99 4.3 Rough Idle, Low Temp, Bad Gas Mileage

Quote:
Originally Posted by dr_lee29
I forgot, the fuel pressure doesn't bleed down quickly but the fuel pressure isn't high in the first place.

Fuel pressure is still way low.
Run some more test on fuel pump.
Check voltage and ground to fuel pump
Run fuel pump for 20-30 minutes and see what the pressure does.

Is the miss on no 4 cyl a dead miss?
Can you feel the miss on engine?
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