what would cause the engine to sure while accelerating up a hill between 2000-2500rpms yet not anytime else?

Robert Wolfe
135

Asked by Robert Oct 18, 2012 at 04:59 PM about the 2002 Pontiac Grand Prix GT Coupe

Question type: Maintenance & Repair

what would cause the engine to sure while accelerating up a hill between 2000-2500rpms yet not anytime else?  i've been told its my egr valve, catalytic converter from one mechanic, another mechanic told me to just put duct tape over the rpm gauge so you don't watch it, another told me it might be my ignition module.  the car has a 3.8L with 225000mi on it.  i don't really want to have to buy another car & have full coverage insurance & a car payment.  would rather just fix the problem.

3 Answers

Robert Wolfe
135

I'm looking into the EGR Valve/Catalytic Converter or Ignition Module, duct tape doesn't fix everything. It only fixes what you don't want to fix.

Jason Zane
3,435

surge? up a hill, it tends to down shift the X-mission for climbing..... shake? a bad ignition module will shake on idle and run rough with power loss(miss) at 45 mph.

John Saffrahn
16,165

Check the motor mounts. The extra stress from the vehicle going uphill may be causing the slightly bad motor mount to act worse. Have someone watch the engine while the car is shifted from drive to reverse. Very little movement is allowed, with the double wishbone motor mounts in this the engine should hardly move. Like jason said any of those three would be present all the time not just uphill. A catalytic converter wouldn't just show up only uphill. EGR would trip a code and so would an ICM. If its not the mounts I would lean towards a trans issue. Its the added stress causing the problem so its something that doesn't do well with stress.

Your Answer

Add photo

Related Questions

Grand Prix
Looking for a Used Grand Prix in your area?
CarGurus has 5,211 nationwide Grand Prix listings starting at $795.
ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 1,590
#2 Tom Demyan
Tom Demyan
Reputation 1,270
#3 John Saffrahn
John Saffrahn
Reputation 910
View All

Related Models For Sale

Used Chevrolet Impala"
1,639 Great Deals out of 58,142 listings starting at $990
Used Pontiac Bonneville"
39 Great Deals out of 1,035 listings starting at $1,995
Used Pontiac Grand Am"
55 Great Deals out of 2,470 listings starting at $1,200
Used Chevrolet Monte Carlo"
66 Great Deals out of 2,391 listings starting at $1,595
Used Ford Mustang"
1,024 Great Deals out of 25,325 listings starting at $1,329
Used Chevrolet Camaro"
600 Great Deals out of 28,476 listings starting at $1,795
Used Nissan Altima"
1,488 Great Deals out of 79,471 listings starting at $995
Used Chevrolet Malibu"
1,531 Great Deals out of 72,599 listings starting at $855
Used Nissan Maxima"
609 Great Deals out of 19,555 listings starting at $1,495
Used Jeep Grand Cherokee"
1,101 Great Deals out of 54,550 listings starting at $995

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
32 Great Deals out of 674 listings starting at $4,499
2007 Pontiac Grand Prix For Sale
32 Great Deals out of 718 listings starting at $2,980
2006 Pontiac Grand Prix For Sale
31 Great Deals out of 741 listings starting at $2,699
2005 Pontiac Grand Prix For Sale
21 Great Deals out of 577 listings starting at $2,753
2004 Pontiac Grand Prix For Sale
38 Great Deals out of 881 listings starting at $1,395