08 Pontiac grand prix 3.8L V6 running rough out of the blue

10

Asked by Jun 26, 2015 at 11:49 AM about the 2008 Pontiac Grand Prix

Question type: Maintenance & Repair

I was driving my car this morning and it
was running perfectly fine. Stopped
somewhere. Then when I got back in my
car and tried to start it. It did not start right
away and is all of a sudden running rough.
Like it's missing. When I'm driving it seems
to be fine. But when I slow down and idle
it's running very rough. Car has a light
shake and sounds sputtery. Any answers?
Answers as fast as I could get them would
be nice as I need my car to get kids and get
to work.....

5 Answers

104,225

Sounds like MAP sensor or MAF sensor. if these don't work test the ECM

1 of 1 people found this helpful.
10

I just went and had it put on a free diagnostic. They said it had random cylinder misfire. They said it could be spark plugs, plug wires, or coil packs. So I get to check or change those.

1 of 1 people found this helpful.

How'd it go? My mechanics have been going back and forth on my car. I have one mechanic that has hooked my car up to everything to no avail or probable cause. But when I think it's gonna work; it doesn't. I have another mechanic that will replace my starter module and plugs that may or may not fix the car. I have the car start up most of the time but have to floor it to get it to start sometimes. It also sounds like it's misfiring when I go uphill.

2005 pontiac grand prix gtp supercharge was running perfectly fine. Got done working my car was running really rough where i would the car in neautral sitting still to prevent car from dying. Had my car in neautral at a stop light and i heard a short whinning noise and car shut down and I am unable to get my car started again.

How do I go about changing the plenum

Your Answer

Add photo

Related Questions

  • 08 Pontiac grand prix 3.8L V6 running rough out of the blue 5 answers

    I was driving my car this morning and it was running perfectly fine. Stopped somewhere. Then when I got back in my car and tried to start it. It did not start right away and is all of a sudden run...

    2008 Pontiac Grand Prix

    -

    Maintenance & Repair

  • is a Pontiac Grand prix 97 3.8l v6 w/o SC the same engine as the Grand prix GTP 3.8l With SC? 3 answers

    I have a 97 Pontiac Grand Prix GTP 3.8L SC and it Turned a Rod bearing and i was wondering if the 3.8l W/O SC out of a 97 Grand Prix GT will work in my GTP with my Supercharger? Is the block the same...

    1997 Pontiac Grand Prix 2 Dr GTP Supercharged Coupe

    -

    Maintenance & Repair

  • Where is the thermostat in a 1999 Pontiac Grand Prix 3.8L V6 1 answer

    I need to Locate the Thermostat on my 1999 Grand Prix, It is over heating suddenly & I was wondering if I could start with a possibly a cheaper fix than taking it in for diagnostics & a new water pum...

    1999 Pontiac Grand Prix 2 Dr GTP Supercharged Coupe

    -

    Maintenance & Repair

  • 08 pontiac grand prix 3.8 3 answers

    had car for 2 days then while driving the car just shut off everything worked bot wouldn't turn over the next day we messed with it a few min and it just started and ran fine I got car home and shut i...

    2008 Pontiac Grand Prix Base

    -

    Maintenance & Repair

  • '08 Grand Prix 1 answer

    I have a base model, V6 Grand Prix, which needs a tranny. I've found an '05 base model Grand Prix, which is also a V6. Will the transmission from the 2005 Grand Prix, fit in my '08?? And, they are ...

    2008 Pontiac Grand Prix Base

    -

    Maintenance & Repair

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,918 nationwide Grand Prix listings starting at $1,995.

ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 4,270
#2 Tom Demyan
Tom Demyan
Reputation 2,870
#3 munron
munron
Reputation 2,220
View All

Related Models For Sale

Used Chevrolet Impala
613 Great Deals out of 35,409 listings starting at $899
Used Dodge Charger
526 Great Deals out of 29,818 listings starting at $2,000
Used Pontiac G8
14 Great Deals out of 361 listings starting at $5,800
Used Pontiac G6
99 Great Deals out of 4,191 listings starting at $1,600
Used Chevrolet Monte Carlo
27 Great Deals out of 1,460 listings starting at $1,650
Used Ford Mustang
622 Great Deals out of 46,676 listings starting at $750
Used Chevrolet Malibu
1,048 Great Deals out of 78,599 listings starting at $1,500
Used Honda Accord
1,012 Great Deals out of 76,982 listings starting at $999
Used Nissan Maxima
324 Great Deals out of 24,978 listings starting at $999
Used Nissan Altima
1,234 Great Deals out of 79,839 listings starting at $1,500

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
14 Great Deals out of 441 listings starting at $2,495
2007 Pontiac Grand Prix For Sale
16 Great Deals out of 402 listings starting at $1,995
2006 Pontiac Grand Prix For Sale
5 Great Deals out of 489 listings starting at $2,675
2005 Pontiac Grand Prix For Sale
342 listings starting at $2,350

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.