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Unread 07-26-2014, 02:13 PM   #1
bbarkhuff
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Cylinder, fuel injector, exhaust, white smoke

I have a TJ Wrangler.. couple weeks ago my engine light came on, went to diagnosis it, came back the following:

number 3 cylinder, high fuel pressure, injector, and a couple other codes with in this notion.

i have changed out the spark plugs and number three was completely black, burnt out. put a new one in and ran fine for a week. light came back on ran the diagnosis again, same codes.

before changing out the injector I put in a injector cleaner before my last fill up hoping to clear the problem, but didnt. Replaced the old injector with a new one and still doing the same thing. I have been running it to help clear the code, but no luck.

No leaks

rough idle, white smoke, smell of fuel.

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Unread 07-26-2014, 03:09 PM   #2
Dave02TJ
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Could be getting coolant in that cylinder, worth a look.
Remove plug after letting the the vehicle sit for awhile after a run.
Get a really bright flashlight and look through the spark plug hole, bring the piston up to tdc to have a look.

just my first idea, I have many lol.
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Unread 07-26-2014, 03:11 PM   #3
Jerry Bransford
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Is your engine consuming coolant? White exhaust is normally from coolant... often from the coolant getting into the engine via a blown head gasket.
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Unread 07-26-2014, 06:21 PM   #4
Knuckelhead
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Or a cracked head...
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Unread 07-26-2014, 09:42 PM   #5
bbarkhuff
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thanks guys. i will run those by my father and take a look at it. very helpful

thank you
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Unread 07-27-2014, 09:42 AM   #6
WhiteMtnJeep
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A cooling system pressure test coupled with a compression test will answer the white smoke question.
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Unread 07-27-2014, 10:25 AM   #7
bbarkhuff
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checked com. all cly. are at 160 = or - 5 tested with all plugs out. put a new plug in #3 drove it about 5 miles miss comes back pull the plug and it is all black new injector in #3. what do you think about the coil pack good or bad? lots of strong fuel when this happens.can the coil pack be tested?
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Unread 07-27-2014, 10:29 AM   #8
WhiteMtnJeep
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It is possible the the coil pack could be bad. Not sure if you can swap with a good one or not but that would confirm it if the problem moves. Check the boot, too. A torn or punctured boot can cause a miss fire as well.
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Unread 07-27-2014, 12:07 PM   #9
bbarkhuff
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all boots are in good condition. no tears or punctures. everything is firing. so far no white smoke upon starting and revving in place.. will take it for a test drive and see what happens. you guys are big help test drove it lots of white smoke going to do a pressure test on cooling system. why would
compression test come put good if gasket is creaked and not using water?

Last edited by bbarkhuff; 07-27-2014 at 01:38 PM..
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