I have a 2006 Impala the engine is surging at idle and when I driving

SOURCE: rough idle / engine surges until power is applied

Sounds like a possible vaccume hose leak?

SOURCE: when apply throttle at full speed ,engine will

Sounds like e.g.r. valve is stuck and not fuctioning because of carbon build up, you will have to take off and clean, and clean inside intake where it bolts on, use a shop vac for that, also you can buy a screan gasget at any auto parts store to keep any particals you miss in intake from geting back into e.g.r. valve. this should cure both your problems.

Jim Goldsmith

• 2005 Answers
• Posted on Jun 01, 2009

SOURCE: Engine surges. Idles good. sitting still in park, rev the engine and the surging is very evident as when driving. Fuel filter has been changed

hook a vacuum gauge to the intake manifold and, check for a vacuum leak in vacuum hoses and, fittings

Mike Butler

• 6674 Answers
• Posted on Dec 12, 2009

SOURCE: 2006 Chevy Impala reduced engine power

best bet is to stop in at a Pep Boys, Autozone, or similar big autoparts seller, and ask for free trouble code scan, which should pinpoint area causing problem. If not obvious by codes, what is necessary to repair the problem code, get back to us with those codes and we will be glad to assist you further. Better this way, takes away the guess work, and saves you money, as well as getting it right the first time.