engine and sputtering problem

Asked by Feb 20, 2014 at 05:26 PM about the 1999 Pontiac Grand Prix 2 Dr GT Coupe

Question type: Maintenance & Repair

car idles at 2000 rpm
jerks when put in reverse
car dies after driven 5 to 10 feet
just preplaced egr valve,idle sensor, spark plugs
any ideas

2 Answers

2,935

Jerking when you put it in reverse could be due to bad motor mounts, especially the top front 2 motor mounts, but they are easy to change out. The high idle and engine dying could be an issue with the throttle, IAC (Idle Air Control) valve, or a vacuum leak from a hose or intake gasket. You might have a bad fuel pump resistor if there is low fuel pressure at low rpm.

9,705

It's jerking because the engine is idling way too high to switch into gear. Try not to shift it untill you get the RPM back down to 1200 or less, don't push the tranny. What was the car doing before the new parts were installed? Does it smell like it is flooding? Try starting it briefly and check the exhaust. I need to know if your running rich or lean to get closer to the problem.

Your Answer

Add photo

Related Questions

  • Engine power loss and sputtering 45 answers

    It seems like I have a loss of power when accelerating and driving around 50-60 mph at ~2k rpm. The car also sputters and rpm begins to fluctuate while driving. Is the fuel injector bad or clogged and...

    1995 Pontiac Grand Prix 2 Dr SE Coupe

    -

    Maintenance & Repair

  • i have a 99 grand prix and it just started sputtering 9 answers

    It just started this. When i crank it up its sputtering like it wants to cut off. Also when i stop. What could this be?

    1999 Pontiac Grand Prix

    -

    Maintenance & Repair

  • 2006 Grand Prix Supercharged Engine sputtering and etc. 1 answer

    I recently purchased a 2006 Grand Prix GT 3.8L with a Supercharger. The vehicle ran great on my test drive, but after taking it home i noticed that there is a slight chug / sputter at low speeds ...

    2006 Pontiac Grand Prix GT

    -

    Maintenance & Repair

  • engine problems 2 answers

    when you first start the car up, its fine. But after it has been running for a few and for the rest of the day when you're out running around every time you shut the car off, if you wait 5 minutes...

    2002 Pontiac Grand Prix

    -

    Maintenance & Repair

  • 1998 Pontiac Sunfire sputtering and motor shaking when in gear 11 answers

    I have a 98 Sunfire with a 2.2 liter engine and automatic transmission. For a while it has been running rough and the engine shakes when I shift it in to gear. It is most noticeable when idling (in ...

    1998 Pontiac Sunfire

    -

    Maintenance & Repair

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 4,070
#2 Tom Demyan
Tom Demyan
Reputation 2,710
#3 munron
munron
Reputation 2,110
View All

Related Models For Sale

Used Chevrolet Impala
592 Great Deals out of 29,280 listings starting at $1,300
Used Pontiac Bonneville
523 listings starting at $1,695
Used Chevrolet Monte Carlo
11 Great Deals out of 1,417 listings starting at $2,500
Used Chevrolet Malibu
798 Great Deals out of 88,825 listings starting at $1,900
Used Pontiac Grand Am
1,321 listings starting at $799
Used Chevrolet Camaro
142 Great Deals out of 35,634 listings starting at $1,995
Used Ford Mustang
307 Great Deals out of 45,707 listings starting at $2,200
Used Nissan Maxima
275 Great Deals out of 26,159 listings starting at $2,545
Used Pontiac Firebird
9 Great Deals out of 790 listings starting at $1,800
Used Nissan Altima
779 Great Deals out of 78,173 listings starting at $470

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
9 Great Deals out of 437 listings starting at $2,495
2007 Pontiac Grand Prix For Sale
5 Great Deals out of 430 listings starting at $1,200
2006 Pontiac Grand Prix For Sale
4 Great Deals out of 442 listings starting at $1,999
2005 Pontiac Grand Prix For Sale
356 listings starting at $2,999