Having problems with your 2005 Pontiac Grand Prix ?

Throttle being limited on my 05 grand prix..V6 supercharged

\015 The other day the car konked out...pulled over...started up ok. Now when revving up it hits about 4500 rpm and stops..won't go higher no matter if the peddle is to the floor. Seems to me the computer is limiting but no fault lights are on. Any ideas what's up?I recently put in what I think is 10W40 in it. I just went through the manual and it specifically states to only use 5W30...could this be an issue (I just put 5W30 back in)?Thanks,Tom\015 Posted / edited by AnonymousUser on : 26-02-2018

Answers :

I would check for a plugged catalytic converter.
Repair Help & Product Troubleshooting for 2005 Pontiac Grand Prix

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