Engine bogs down around 3000 RPM

Asked by Jul 07, 2017 at 09:45 AM about the 2003 Pontiac Grand Am SE

Question type: Maintenance & Repair

A few weeks ago my car started bogging down around 3000 RPM. It would act perfectly
normally until it hit 3000 RPM, then it would hang at 3000 for a second, then start fluttering and
jerking down to a much lower rpm.

I confirmed that the catalytic converter wasn't the issue, then I sent it to the shop. They replaced
the cam shaft sensor, crank shaft sensor, and all the spark plugs and spark plug wires.

I got it back and it drove fine for a while, then started acting up again. I've been driving it like this
for a week or two, and as long as I accelerate slowly I don't have issues. I have noticed that it
will run at a higher rpm before having issues if the engine is hot; that is, when the engine is cold
it starts having trouble at 2500 rpm, when hot it may run up to 3500 before running into trouble.

Any idea what the issue may be? I can't afford to just replace everything blindly, I'd like to do
some troubleshooting and figure out what the problem actually is before I start buying expensive
parts. Thanks!

tl;dr engine loses power and rpm becomes erratic above 2500-3500 rpm, depending on engine
temp. Already checked cat, cam and crank shaft sensors, and spark plugs.

1 Answer

1,720

sounds like a fuel related issue

Your Answer

Pontiac Grand Am Experts

  • #1
    tenspeed
    Reputation
    7,830
  • #2
    John Saffrahn
    Reputation
    1,610
  • #3
    Tom Demyan
    Reputation
    1,540
View All

Related Models For Sale

Used Pontiac Grand Prix
16 Great Deals out of 2,620 listings starting at $1,450
Used Pontiac Firebird
4 Great Deals out of 779 listings starting at $2,500
Used Pontiac GTO
9 Great Deals out of 486 listings starting at $5,995
Used Chevrolet Impala
545 Great Deals out of 35,190 listings starting at $900
Used Ford Mustang
585 Great Deals out of 36,203 listings starting at $1,200
Used Chevrolet Malibu
977 Great Deals out of 65,933 listings starting at $1,000
Used Chevrolet Camaro
430 Great Deals out of 30,711 listings starting at $2,495
Used Nissan Altima
981 Great Deals out of 77,436 listings starting at $1,000
Used Pontiac Bonneville
503 listings starting at $2,995
Used Honda Civic
754 Great Deals out of 69,403 listings starting at $1,000
Used Pontiac Sunfire
298 listings starting at $2,100

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.