Question about Pontiac Grand Am

1 Answer

Random RPM spikes during highway and city driving. While driving approx. 55 mph the RPM's are around 1600. The RPM's randomly jump 300-400 which only last a second or two sometimes it will hang around 2000 for 5 seconds and then drops back to normal. It might happen 3 or 4 times in a minute then go away for 10 minutes and then start acting up again. It is almost like it is kicking in and out of overdrive which is not the case because when I manually put it in 3rd the RPM's are a lot higher. When ever the RPM's spike it also turns off the cruise control, the problem does still occur even if cruise is off.

Posted by on

  • bratboy90 May 11, 2010

    I have the same issue, I am starting to think it may be caused from my bad CV Joints, because one issues with bad cv joints is abrupt deacceleration, which could be starting and may be my engine just kicks out of overdrive or something. Will post when I figure out after fixing cv joint. Do you have a loud click sound when you turn sometimes???


1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

2001 montana rpm go up when driving then go down

Posted on Aug 13, 2010

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Driving on highway at 55 mph, rpm is over 4500, then Blu a seal, engine oil all under the van.

Why was rpm so high? Trans stuck in 2nd? Crazy rear end gear? Does it always do this, or was this abnormal? As to blown seal, replace it.

Aug 03, 2015 | Cars & Trucks

1 Answer

Why is my rpm runs high at 55 mphr at 3500

Your transmission is not shifting make sure it is in D, if automatic

Sep 01, 2014 | 2003 Kia Spectra

1 Answer

High rpm at highway speed

No idea why you would drive that fast,
but 2800 is about right at that speed

Did you just get the car & never own one that
went to 2800 at that speed

Tap the brake around 55 & see if the rpm goes up,
indicating that torque converter lock-up is working

Don't do that at 70 mph

Jan 29, 2013 | 2000 Mercury Sable

2 Answers

Highway driving problem. City driving ok.

If you have been to three shops,I'll assume that all the basics have been covered. Did anyone check computer stored codes? What did they see? If you are going to try to fix it yourself, you will need to get a manual and check each and every component, one by one. Also, outside of the realm of computer stuff, check converter to make sure its not partially plugged. At low rpm city driving it may be flowing just enough to get by on. Also check that fuel is clean and has no water in it.

Feb 26, 2009 | 2004 Jeep Grand Cherokee

1 Answer

RPM jumps

Does the RPM seem to bog down around 3000 - 3500? If so you have fuel delivery problem> Start with the filter.

Feb 22, 2009 | 2001 Chevrolet Blazer

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

1,320 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pontiac Experts


Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8201 Answers

Are you a Pontiac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides