I have a 2011 Dodge Challenger 5.7 Liter, I keep getting a PO303 code from the check engine light which keeps flashes when ever I accelerate hard. It use to come on and stay on but after I replaced all of the spark plugs, I also moved the coil from cylinder 3 to cylinder 4. I bought a new fuel injector for cylinder 3. I am lost now when I accelerate hard my check engine light flashes and goes out, and when I stop the engine runs rough and shakes bad and then after while it smooths out and sometime starts running rough again. Also if I turn the engine off and try to restart the engine,the it drags like its not wanting to start but it does start and runs rough and shakes. I have add fresh gas 93, fuel injector cleaner. HELP I'm lost and tired of throwing money at this problem. I need a spot on answer.
William
http://www.challengerforumz.com/threads/chrysler-hemi-timing-chain-defect.115406/
May or may not be part of your problem... but Its worth checking into... Which may involve the answer already provided... - A trip to the dealer... they should be able to look up any maintenance done to the car ... unless you have owned it since new.. then you would know what has been done to it...
May or may not be part of your problem... but Its worth checking into... Which may involve the answer already provided... - A trip to the dealer... they should be able to look up any maintenance done to the car ... unless you have owned it since new.. then you would know what has been done to it...
First stop driving! Do some testing. If you move the coil to another cylinder now does the misfire move with it? Next do a compression check on the bad cylinder as well as the 2 next to it on both sides meaning same side of the engine.
If the problem cylinder is low only, squirt some oil in the hole and retest. Does it come up after that....Then report back.
Don't drive with flashing check engine light that is a dead miss and things can go bad fast that way.
If the problem cylinder is low only, squirt some oil in the hole and retest. Does it come up after that....Then report back.
Don't drive with flashing check engine light that is a dead miss and things can go bad fast that way.
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