Question about Cars & Trucks
4.7l runs rough at idle and low speed only. Flashing Check Engine Light appears. When A/C is turned off, flashing check engine light disappears and idle returnd to normal..any ideas?
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: Flashing check engine light
was anything recently changed on the car, like sparkplugs etc. this happened to my 2000 saab 9-3 after i put aftermarket spark plugs in, but if none of that just ask autozone to check it for free
Posted on Jun 05, 2009
Drop in to an Autozone, or Pep Boys, or similar big parts store & they will usually scan for codes free. This will hopefully eliminate all the guess work, or at least point everyone in right direction for better diagnosis. If not obvious from codes what the problem is, get back to us and we'll help you out.
Posted on Aug 23, 2009
Testimonial: "Thanks for the great suggestion . I'll have Autozone read the codes on Monday. Thanks again!"
1st try and search for a vaccum leak, due to the fact that these vehicles have had some bad problems with the length of wires and hoses, if there is a vaccum leak in the vehicle somewhere that will trigger other malfunctions in your vehicle. Using a can of starting fluid or Brake cleaner spray lightly spray around our engine til you hear the motor rev-up and the spot you have sprayed will determine where your vaccum leak will be. And then check under your distributor cap for any moisture be sure to take a rag and wipe and residue off. Also check the firing order on your distributor.
Posted on Oct 28, 2009
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