What would cause rpms to be affected while slowing down from 55mph to 15mph & then back to 55mph? If I switch it into N & then back to D it doesn't do anything.

275

Asked by Nov 06, 2012 at 10:23 AM about the 2002 Pontiac Grand Prix GT Coupe

Question type: Maintenance & Repair

What would cause rpms to be affected while slowing down from 55mph to 15mph & then back to 55mph?  If I switch it into N & then back to D it doesn't do anything.

4 Answers

165

What are you asking? Rpms are how fast the engine is spinning, so as you slow down they will change, it will change as the trans downshifts/upshifts.

37,295

On top of that, what do you mean it does nothing? It stops acting strange or it acts like its still in neutral?

1,215

Why shift to neutral???? I'm soooooo confused!!!!!!!!!

275

While driving if I switch gears into neutral or Drive 3 the problem goes away. What I'm asking is why is the engine/trannsmission surging, jerking, lunging like it wants to stay running or driving yet while driving at 0-40mph or at highway/freeway speeds under cruise control it doesn't act this way, only acts this way if the accelerator is in a certain spot or while accelerating onto highway/freeway ramps or after roundabouts or while going uphill, nothing confusing about it really, just don't want to have to put duct tape over the rpm gauge like one mechanic told me to do & just deal with it.

Your Answer:

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 1,702 nationwide Grand Prix listings starting at $1,500.

ZIP:

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,740
  • #2
    Tom Demyan
    Reputation
    3,320
  • #3
    munron
    Reputation
    2,890
View All

Related Models For Sale

Used Chevrolet Impala
513 Great Deals out of 25,945 listings starting at $995
Used Pontiac Bonneville
3 Great Deals out of 330 listings starting at $2,900
Used Chevrolet Monte Carlo
962 listings starting at $1,125
Used Pontiac Grand Am
736 listings starting at $2,500
Used Chevrolet Malibu
604 Great Deals out of 50,816 listings starting at $600
Used Ford Mustang
310 Great Deals out of 39,695 listings starting at $1,312
Used Chevrolet Camaro
242 Great Deals out of 26,852 listings starting at $4,000
Used Pontiac Firebird
8 Great Deals out of 689 listings starting at $3,995
Used Nissan Altima
861 Great Deals out of 61,735 listings starting at $1,000
Used Honda Accord
682 Great Deals out of 101,645 listings starting at $999

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
8 Great Deals out of 269 listings starting at $1,690
2007 Pontiac Grand Prix For Sale
244 listings starting at $2,295
2006 Pontiac Grand Prix For Sale
3 Great Deals out of 284 listings starting at $1,500
2005 Pontiac Grand Prix For Sale
216 listings starting at $1,995

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.