Question about Cars & Trucks
Not a lot of information to go on. it could be with all u have done not helping that the engine could be out of time. when it miss fires does it pop or backfire? if it does your problem most likely is with the timing.. also r u sure that the other coil packs r good? it might be worth it to have them checked first. hope this helps
Posted on Apr 16, 2014
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Posted on Jan 02, 2017
Check to make sure the fuel injector is working on that cylinder, check the connector to the injector for a loose or damaged pin, get a NOID tester from a parts store and see if the injector flashes the NOID light while the engine is running or cranking.
Posted on Oct 13, 2008
SOURCE: Random Misfire on 2 & 3
I had a problem with a chevy with random misffires on all cylinders. It was the computer. Fords have very few problems with there computers. Does the check engine come on? Maybe have it scanned.
Posted on Dec 12, 2008
SOURCE: 2001 Firebird 3.8 misfires
Check your alternator see if you have a drop in voltage on your tack,then it is the problem.I too was a victim of high price tune up and still had a problem with a misfire.and cover your coil pack with a piece of rubber water run of onto your power pack .Another thing is to use a silicone spray on all wires.
Posted on Jun 11, 2009
SOURCE: 1999 Grand Am 3400 v6 misfire.
I was asking about the pushrods because I had this problem with one of these engines that had a bent push-rod. I robbed a push-rod out of an older 3100 and it was just a fraction of an inch longer which bottomed out the lifter. I figured it out by removing the valve cover and loosing the rockers when it was running and it smoothed out. I'm guessing you checked for vacuum leaks already. How about injection pulse on the number 6 cylinder when running. Another thing you could check is running compression. You said you checked compression but did you just check cranking compression or did you check running compression too.
Posted on Apr 09, 2010
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