waiting gas .and starts to shake when in reverse.

2000 CADILLAC ESCALADE
199,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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SPOOK13
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My gas mileage is terrible...when I shift in reverse it acts all funny and starts shaking like if it wants to turn off...and it smells like bad or raw gas....I Changed the spark plugs and added some fuel injector cleaner to gas tank.and the check engine lite turned off. ...2 weeks past and check engine light came back on. the code on scanner was po306 Cadillac cylinder 6 misfire. Detected...could it be a bad fuel injector, or ignition coils. Can some one help..thanks
May 22, 2015 at 11:38 AM
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HMAC300
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misfires are hard to diagnose and should be left to pros it can be bsic problems like acoil/plug or injector or sensors , vacuum leak as well as any sensor. that is causing your shaking due to the misfire.
May 22, 2015 at 12:39 PM