I have a 2007 Pontiac Grand Prix GT Supercharged it's running sluggish has no power and looses speed on an incline

Asked by Jan 18, 2013 at 03:04 PM about the 2007 Pontiac Grand Prix GT

Question type: Maintenance & Repair

It was throwing 2 codes, P0404 EGR Valve and P0300 multiple random cylinder miss fire. I have replaced
the plugs and wires, cleaned throttle body, blew an injector out and ran sea foam injector cleaner in it,
cleaned mass air flow sensor, replaced the EGR valve, and the car is still running like crap no power and
loose speed on an incline and still throwing P0300 multiple random cylinder miss fire what do I do next.
HELP :-{ 68k miles on it

1 Answer

2,815

Are you making sure to use premium fuel? Try using some octane booster

Your Answer

Add photo

Related Questions

  • 02 Grand Prix GTP Diagnosis 8 answers

    Hello. I'm asking this question here because it's been impossible to find an answer for my specific situation. I have a 2002 Pontiac Grand Prix GTP. It has a 3800 Series 2 engine with the Supercharger...

    2002 Pontiac Grand Prix GTP

    -

    Maintenance & Repair

  • noise also when turning right 35 answers

    We have a 2004 grand prix and it makes a noise everytime we turn right the sound is the same as if the sway bar is broke (we know this because that happended 4 mnths before this). This has been going ...

    2004 Pontiac Grand Prix GT1

    -

    Maintenance & Repair

  • Where is fuse for fuel gauge located and what is it's name for 2003 Pontiac grand prix 12 answers

    2003 Pontiac Grand Prix

    -

    Maintenance & Repair

  • 2001 grand Prix abs/TCS/power steering/cruise 6 answers

    Greetings! So, it's like this... A couple of months ago my abs light started coming on intermittently immediately accompanied by the TCS OFF indicator. I checked the wiring on the front speed senso...

    2001 Pontiac Grand Prix GTP

    -

    Maintenance & Repair

  • How much can I get for my 01 Grand Prix GT 5 answers

    I am finally getting rid of my 2001 Pontiac Grand Prix GT 3800 V6. I need to know what I can get for it and whether it would be better to trade it, sell it to a private party, or just scrap it? It h...

    2001 Pontiac Grand Prix GT

    -

    Shopping & Pricing

Search Pontiac Grand Prix Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 3,870
#2 Tom Demyan
Tom Demyan
Reputation 2,570
#3 munron
munron
Reputation 2,060
View All

Related Models For Sale

Used Chevrolet Impala
935 Great Deals out of 35,463 listings starting at $1,995
Used Pontiac G8
21 Great Deals out of 463 listings starting at $5,000
Used Dodge Charger
469 Great Deals out of 29,730 listings starting at $2,275
Used Pontiac G6
98 Great Deals out of 5,154 listings starting at $999
Used Pontiac Grand Am
1,699 listings starting at $1,000
Used Chevrolet Monte Carlo
13 Great Deals out of 1,701 listings starting at $2,000
Used Chevrolet Malibu
1,123 Great Deals out of 82,795 listings starting at $1,800
Used Ford Mustang
582 Great Deals out of 41,214 listings starting at $1,699
Used Pontiac GTO
9 Great Deals out of 512 listings starting at $5,500
Used Jeep Grand Cherokee
1,001 Great Deals out of 65,971 listings starting at $1,500
Used Chrysler 300
498 Great Deals out of 22,256 listings starting at $1,000
Used Honda Accord
1,082 Great Deals out of 76,813 listings starting at $1,395

Used Cars For Sale

2007 Pontiac Grand Prix GT For Sale
114 listings starting at $1,997
2006 Pontiac Grand Prix GT For Sale
113 listings starting at $1,550