2000 Cadillac Deville p0306 code check engine light on

2000 CADILLAC DEVILLE
110,000 MILES • V8 • 2WD • AUTOMATIC
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CADILLAC70
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  • 1 POST
hello guys, i got a p0306 code and check engine light blinking.. should i check into the coil pack or the fuel injector.. do you know which one would most likely set off this code?... thank you... charlie... i will make a donation for your help...
Dec 24, 2009 at 2:18 AM
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MATHIASO
  • ✓Experienced Mechanic
  • 1,209 POSTS
Hello cadillac70

The cylinder # 6 is misfiring.

The problem ranges from fouled spark plug, broken spark plug wire,broken intake/exhaust valve , to the coil.
check spark plug in the #6 and it wire,(replace)
Those are easy fix, if the misfire still there after you check or change those; a compression test might be done to determine if it is a broken valve or head gasket.
If there is no problem with the compression, swap the #6 wire on the coil to the one beside it. If the misfire moves to the cylinder that is beside the #6, the problem is with the coil. If the misfire still at #6, the problem should be within the part already mentioned (spark plug wire, broken intake/exhaust valve, head gasket
Dec 24, 2009 at 3:41 AM
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