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Vx commodore rough idle after service

Vx commodore series 1 v6 auto serviced - new fuel filter, new oil filter, new oil, new spark plugs, new leads now engine idles and drives a bit rough and jumpy / jerky - it was running very smooth prior to this service. took back 2 mechanic and said to try injector cleaner...didnt do jack..as i predicted. i dont think its the coil packs or injectors, as the car was running smmoth prior to service! on the up side it exhaust fumes are far lesser now and has more power, thats all tho.. what could be causing it to run rough 8-/ ????????? thanks!!!!!!

Posted by Anonymous on

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Posted on Jan 02, 2017

  • 16 Answers

SOURCE: 02 Chevy Avalanche Off idle engine runs rough then smooths out

The clamp bolt in the center of the steering column put a small cut in the #5 ignition wire and sent the code to the computer for multiple ignition failures(I forget exactly the terminology that they used and what code; I think it was 0300). The arching must have told the computer to richen up the mixture because you could smell raw fuel. I replaced the wires and ran a can of Seafoam through one of the vacuum lines(brake booster) and all seems well. If I had listened to everything I read at other websites I would have been replacing the Cats and the Ignition Coils-very expensive items. Instead it cost me $50 for a set of wires.

Posted on Dec 07, 2009

dturnlund
  • 45 Answers

SOURCE: engine runs rough at idle and bucks at highway

I had a similar problem in a 1994 Taurus, and after spending nearly 300$ on ignition parts, it turns out the problem was a bad spark plug wire that cost me 8.88$ to replace.

Posted on Mar 01, 2010

Testimonial: "n.o. 1 spark plug wire it is. thank you"

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