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


sounds like a fuel related issue

Your Answer:

Pontiac Grand Am Experts

  • #1
  • #2
    John Saffrahn
  • #3
View All

Related Models For Sale

Used Pontiac Grand Prix
55 listings starting at $8,600
Used Pontiac Firebird
17 listings
Used Chevrolet Impala
29 Great Deals out of 908 listings starting at $2,400
Used Pontiac GTO
4 listings
Used Chevrolet Camaro
14 Great Deals out of 1,001 listings starting at $10,500
Used Ford Mustang
53 Great Deals out of 1,523 listings starting at $2,900
Used Honda Accord
38 Great Deals out of 1,816 listings starting at $2,616
Used Chevrolet Monte Carlo
14 listings starting at $3,600
Used Nissan Altima
39 Great Deals out of 1,310 listings starting at $1,995
Used Chevrolet Malibu
32 Great Deals out of 1,739 listings starting at $2,995
Used Toyota Camry
34 Great Deals out of 1,937 listings starting at $1,750

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. Content will be removed if CarGurus becomes aware that it violates our policies.