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.

415

Asked by Robert 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

235

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.

69,945

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

415

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 nationwide Grand Prix listings and the tools to find you a great deal.

Postal Code:

CarGurus Experts

  • #1
    munron
    Reputation
    8,230
  • #2
    James Sparrow
    Reputation
    7,530
  • #3
    Dorian Hendricks
    Reputation
    6,190
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Impala
6 Great Deals out of 94 listings starting at $3,495
Used Chevrolet Camaro
20 Great Deals out of 281 listings starting at $7,995
Used Ford Mustang
58 Great Deals out of 1,366 listings starting at $4,995
Used Pontiac Firebird
14 listings
Used Chevrolet Corvette
27 Great Deals out of 1,082 listings starting at $15,000
Used Buick Regal
3 Great Deals out of 39 listings starting at $4,991
Used Chevrolet Monte Carlo
5 listings starting at $9,449
Used Jeep Grand Cherokee
109 Great Deals out of 3,136 listings starting at $3,995
Used Chevrolet Silverado 1500
195 Great Deals out of 5,877 listings starting at $2,975

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.