Ask Experts Questions for FREE Help !
    techtimdavis's Avatar
    techtimdavis Posts: 103, Reputation: 1
    Junior Member

    Feb 22, 2019, 05:32 AM
    Engine surges at 45-55 mph
    2002 pontiac grand am 3.4l v6 surges at 45-55 mph, not every trip. Checked for dtcs only dtcs are o2 sensor related. What would be the most probable cause of this surging at this speed range?
    kitch428's Avatar
    kitch428 Posts: 1,428, Reputation: 152
    Ultra Member

    Feb 24, 2019, 11:53 AM
    If the car has egr, I'd be looking into that. Could be leaning out at that speed.

Not your question? Ask your question View similar questions


Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.

Check out some similar questions!

Engine surges [ 1 Answers ]

My engine surges all the time I have a 2003 pontiac vibe 2wd 4cylinder

Craftsman Riding Mower engine surges [ 3 Answers ]

Craftsman riding mower is around 7 years old. Engine, not mower, surges in idle and while mowing; replaced plug, gas line, gas filter, filled w/new gas, & air filter. What else can I do?

My car was overheating now the engine surges [ 11 Answers ]

My car recently started having overheating problems. I realized something was different when it warmed up pretty quickly. I blew a few hoses already. But its still driveable. After a few days. When I turn the car on my car goes from 2 thousand to 3 thousand rpms by itself Up then down up then...

1985 Toyota Tercel Engine surges [ 1 Answers ]

My 1985 Toyota Tercel, 1.5 liter 4 cyl, carburetor, surges when the throttle is held steady at about 1200 rpm. It starts well and runs well at other speeds. No smoke or backfire. New plugs and cap, clean egr valve.

View more questions Search