Starts and idles fine. Won't accelerate. I can play with throttle to get it moving. Acts like a fuel delivery issue but have 47 psi even when I hit the gas.

Asked by Jul 05, 2016 at 07:09 PM about the 2003 Pontiac Bonneville SLE

Question type: Maintenance & Repair

When I remove vacuum hose from regulator I get 60 psi fuel pressure.  I have P0102, P0131, P0171. I had a bad MAF but replaced it and I ran perfect for 400 miles last week.  I will replace fuel filter today just because it's time anyway but if it was bad I would expect PSI to be low. If it is parked and open throttle it balks like no fuel but PSI doesn't go below 47.

1 Answer

I put the old MAF back in because it would run perfect for 10 miles before acting up. It ran fine the same as before so I knew the second MAF also failed. Bought a new one AGAIN and replaced it the second time. It has been running fine for 2 weeks now. All fixed.

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