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-   -   Missing cylinder, check engine light, and gas smell. (http://www.wranglerforum.com/f218/missing-cylinder-check-engine-light-and-gas-smell-252446.html)

Pittsburghwrangler 06-28-2013 11:12 PM

Missing cylinder, check engine light, and gas smell.
 
So I drove my wrangler this morning and it was running great. I drove about 5 or 6 mi and didn't take it above 40 mph and then parked outside of my appt. Then tonight I tried to leave for the gym and when I fired it up it sounded like a cylinder was misfiring, the check engine light was on and I noticed a small amount of whitish smoke from the exhaust. I turned it off and tried playing with the spark plugs and distributor cap a bit, no change. Tried this again with no change. I made some calls to mechanic friends and one told me it might be a head gasket leak, another told me just a fouled plug. After about 10 mins I started it again and everything seemed fairly normal (just a slightly rougher idle than before) I idled it for awhile and then took a drive and noticed I had significantly less power than before (pretty bad thing with a fourbanger). Any ideas?

AllMudd 06-29-2013 12:20 AM

Pull your dipstick and check the oil to see if is starting to look like milk chocolate. Also with it running some good gloves and a pair of pliers if needed. Take one plug wire off at a time see if it makes a difference if not that cylinder is not firing and you've found If your problem. If it does change how it runs then that cylinder is fine. Also if the exhaust smells sweet like antifreeze does more than it does like regular exhaust. Will indicate a blown head gasket.

Pittsburghwrangler 06-29-2013 01:59 AM

Quote:

Originally Posted by AllMudd (Post 3910337)
Pull your dipstick and check the oil to see if is starting to look like milk chocolate. Also with it running some good gloves and a pair of pliers if needed. Take one plug wire off at a time see if it makes a difference if not that cylinder is not firing and you've found If your problem. If it does change how it runs then that cylinder is fine. Also if the exhaust smells sweet like antifreeze does more than it does like regular exhaust. Will indicate a blown head gasket.

Already checked oil and it looks good, a little dirty at most. about removing the wires, I hadnt thought of that will do in the morning. the exhaust had a strong gas smell but no antifreeze, I think I am most concerned by this because I was afraid of the heat from the exhaust lighting unburnt fumes...

Thank you for the advice

Pittsburghwrangler 06-29-2013 12:12 PM

Well I just took of the spark plugs one by one, they were all firing for sure because when I took each one off the engine started behaving as it was last night when the problem happened... Do you think it might have just been a fouled plug/loose wire that somehow fixed itself? I was considering having a service shop do a compression test just to check the head gasket, should I bother?

AllMudd 06-29-2013 01:23 PM

Did you pull the plug or just the wire? Could have been a lose it dirty connection and you corrected that. I would drive it down the street see how it performance then see about the compression check.

Pittsburghwrangler 06-29-2013 01:48 PM

I just pulled the wires not the plugs, from both the distributor and the plugs. Think you're probly right just dirty, performance seemed fine (well normal you know old jeeps lol). Thanks for your help if it comes up again I'll actually take it to a shop. The advice was much appreciated

Pittsburghwrangler 07-01-2013 11:37 PM

Ok so the problem reoccurred but minus the exhaust smoke, this time I listened to it for about 30 seconds checked out the exhaust and then turned it off... when I turned it back on like 2 seconds later the problem was gone... Im pretty confused but this time it was raining pretty hard right before this happened... could this be a problem with my coil? ive heard that water can cause an ignition problem with a bad coil but usually during a carwash or something like that

AllMudd 07-02-2013 07:34 AM

Yea if water gets into the wires cause of them being old or into the cap it will do this as well.

Pittsburghwrangler 07-02-2013 08:44 AM

Quote:

Originally Posted by AllMudd (Post 3919716)
Yea if water gets into the wires cause of them being old or into the cap it will do this as well.

Ok I guess I'll have to experiment with a hose and see if thats it. Thanks for your help again :thumb:

Pittsburghwrangler 07-02-2013 12:41 PM

AAAAAHHHHHHH now a bigger problem, happens every time now and a whole bunch more whiteish smoke from exhaust including after I turned it off. I think it a cylinder isn't firing and the gas is burning up in the cat but what scares me is the massive amount of gas smell (I actually have a headache from it). It seems like a massive amount of gas is coming through (maybe the real problem is a stuck fuel injector?). I'm definitely having it towed down to the shop and have them check it out.

AllMudd 07-02-2013 01:01 PM

Good luck hopefully it is just a bad injector

Pittsburghwrangler 07-02-2013 04:16 PM

Thanks me too


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