Question about 2006 Dodge Charger

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How do I troubleshoot problems for a hemi car engine? Car has been back and forth to dealer six or seven times, do to check engine light. Car has been tuned up, wire harness changed and engine decarbonized. Still engine starts rough and check engine light comes back on,   but after 8 to 10 minutes warming up, engine seems to run fine, yet the engine light remains on. This happens every time the car sits more than six hours (rough starting and so on as stated above). It has been hooked up to Autoquest Diaognostics and states multi cylinder miss fire. Please help.

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Misfiring is often due to ignition system components. "Decarbonizing" is Chrysler's version of using "SeaFoam" in your engine. In fact, the product is basically the same, only more expensive. It has nothing to do with misfiring unless your spark plugs are coked up.

A consistent misfire in your engine should be diagnosed by checking fuel and ignition system components and doing a compression check on the engine cylinders. If the cylinder compression numbers aren't fairly even, or are lower than they should be, that would explain the misfire.

I'd bet you either have fouled injectors or faulty wiring.

It seems to be more and more common since the induction of OBD systems that "technicians" rely entirely on the OBD system and throw parts at a problem, without applying proper diagnostics to actually figure out what's causing the issue. You seem to have fallen victim to this exercise in cash-tossing.

Posted on Dec 26, 2009

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The mechanic should use or do this ,"engine lubrication ".cleaning the engine while fixing the engine .If the problems in the multi cylinder, then its the piston and the piston rings. Replace the destroyed or worn out piston rings.then check the crank shaft and the cam shaft for for assurance .then set in timing for ICPE ,icpe is the intake, compression ,power and exhaust.then check and arrange the engine valve.the mechanic should use filler guage for the valve .the misfiring ,check the carburetor or fuel pump throttle.may be its stuck.In High speed auto-diesel mechanic , trouble shooting is what we always encountered while studying .But its not just engine but even car electrical problem.headlights , fuses and other electrical parts of a car.But its seems that the problem of the car is not electrical problem sir , good day sir.

Posted on Aug 05, 2009

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