2005 Pontiac Grand Prix GT engine size 3.8

Asked by Dennis May 13, 2021 at 08:01 AM about the 2005 Pontiac Grand Prix GT

Question type: Maintenance & Repair

2 Answers

Dennis answered 2 years ago

I cleaned the throttle body on the engine I changed the spark plugs and wires I am still having a lot of putting in a loss of power it's a brand new battery I need to know how to fix the problem and my transmission seems to be slipping

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munron answered 2 years ago

Scan for trouble codes and test fuel pressure if you haven’t already. Check the catalytic converter to be sure it’s not plugged. Spend some time going through the electrical system making sure grounds and connections are all clean and tight.

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