poor acceleration

Asked by cpitts8989 Jul 08, 2009 at 01:46 PM about the 1989 Pontiac Grand Prix

Question type: Maintenance & Repair

i just brought a 1989 grand prix and the acceleration is poor from the go do u think its the convert

1 Answer
20,115

Mike answered 15 years ago

Either Exhaust restriction or low fuel pressure. DO a back pressure test befoe the cat and it should only be around 1-2 inches Easies test is the release the engine pipe from the mainfold and go scooting around town - If its the cat it will have all the power back but of course the local smoky will not like it ... :)

Mark helpful

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