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08-10-2012, 05:41 PM
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#1 |
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Jeeper
Join Date: Jun 2012
Location: Payson Arizona
Posts: 31
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Bad injector?
Anybody ever had a bad injector? what were your symptoms,mine are after warmed up turn jeep off ten miutes later want to cough spudder spit and throw misfire codes to cylinders 3 and 4.seems like a loss of power too,runs ok till i shut it off then have to clear the codes to even get it moving,just wondering if anyone else has had this happen any help would be appreciated....
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Opened Pyatte Draw 2001,Hosted BFG Challenge on Draw 2006,Sunflower Mine Trail 2000,Turtle Creek,Lizzurd Creek,Staircase,Roberts Mesa 2001,Webber Creek2007 |
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08-10-2012, 05:57 PM
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#2 |
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Trail Guide
Join Date: Jun 2010
Location: Maine
Posts: 684
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Sounds like your boiling the fuel in the rail causing the misfire. With the exhaust being right under the intake it throws a lot of heat at the intake and fuel rail when the truck gets shut off and there is no air flow. My 01 does it from time to time, I either keep it running or leave it off for longer periods of time to let it cool off before restarting.
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The government cannot give to anybody anything that the government does not first take from somebody else. |
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08-10-2012, 07:41 PM
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#3 |
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Lemming
Join Date: Jul 2003
Location: Gorham, ME
Posts: 8,557
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What year? Is it distributor or coil pack ignition? I've also had ^ this ^ problem before, but only when the engine gets into the 220 degree and up range and I shut it down. My XJ has a bad cyl. head, so she overheats pretty bad.
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#95 NER SCCA Rallycross http://www.flickr.com/photos/47757586@N00/ 2000 XJ Fixed..ish 2011 JK Unlimited DD |
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08-10-2012, 10:11 PM
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#4 |
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Jeeper
Join Date: Jun 2012
Location: Payson Arizona
Posts: 31
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its a 2001
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Opened Pyatte Draw 2001,Hosted BFG Challenge on Draw 2006,Sunflower Mine Trail 2000,Turtle Creek,Lizzurd Creek,Staircase,Roberts Mesa 2001,Webber Creek2007 |
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08-10-2012, 10:32 PM
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#5 |
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Trail Guide
Join Date: Feb 2006
Location: Roanoke VA
Posts: 974
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Heat soak is a common problem on the 4.0 from the early years(87) and up. I own 4 XJ's and one MJ. Two of the 5 have the heat soak issue. Easy to diagnose, hard as hell to stop it. I have tried insulation, heat wraps and spark plug insulation. The only thing that fixes it is colder weather.
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1996 XJ Country Trail Rig w/lots of stuff 1990 XJ Laredo stock/new motor installed, resto-mod done! 1989 MJ, 2000 XJ Classic stock, my son's 1994 XJ stock beater 2008 JK Sahara (POS!) at least it has a SFA! 2009 Hemi Commander (Awesome Jeep) Wish it had a SFA:-( |
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08-11-2012, 10:55 AM
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#6 |
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Jeeper
Join Date: Jun 2012
Location: Payson Arizona
Posts: 31
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Ok, but why would eliminating the misfire codes fix the problem till the next time it happens,maybe in the computer? doesn't make sence if it was heat soak or boiling fuel in the rail how would clearing the misfire codes cure that?I wonder if the computor needs to be replaced or re-flashed....
__________________
Opened Pyatte Draw 2001,Hosted BFG Challenge on Draw 2006,Sunflower Mine Trail 2000,Turtle Creek,Lizzurd Creek,Staircase,Roberts Mesa 2001,Webber Creek2007 |
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08-11-2012, 05:20 PM
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#7 | |
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Trail Guide
Join Date: Feb 2006
Location: Roanoke VA
Posts: 974
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Quote:
__________________
1996 XJ Country Trail Rig w/lots of stuff 1990 XJ Laredo stock/new motor installed, resto-mod done! 1989 MJ, 2000 XJ Classic stock, my son's 1994 XJ stock beater 2008 JK Sahara (POS!) at least it has a SFA! 2009 Hemi Commander (Awesome Jeep) Wish it had a SFA:-( |
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