1995 wrangler flooding out with gas RUNS and BACKFIRES at idle quits 1 min of running - JeepForum.com
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Unread 02-13-2013, 05:04 PM   #1
xpdude
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1995 JK Wrangler 
 
Join Date: Feb 2013
Location: elgin, il
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1995 wrangler flooding out with gas RUNS and BACKFIRES at idle quits 1 min of running

1995 wrangler floods out with gas. Runs semi smooth then starts to POP POP BACKFIRE then it dies out. pulled plugs and all but two were soak with gas. what would cause this? it has a new ECU fuel-pump plugs cap rotor. crank position sensor. checked compression has 150PSI first three cyl then 160 4th cyl. FUEL PSI 35 idle. REMOVE vacuum line @ regulator and jumps to 40PSI. I think that checks out ok. SPARK is yellow / white. Is that weak? I though the coil may need to be replaced? Resistance checked out on the coil. what else could cause it to flood? could the timing be off and still have compression?

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Unread 02-13-2013, 05:28 PM   #2
Mark05059
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1989 YJ Wrangler 
 
Join Date: Mar 2009
Location: quechee Vermont
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at a guess... sounds like your injectors are leaking/plugged and are dribbling gas in instead of spraying in like it should.
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Unread 03-25-2013, 11:49 AM   #3
xpdude
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1995 JK Wrangler 
 
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ok. update!!! ECU is bad and not working right. runs but skips and backfires. I TRY THE UNIT IN SOMEONES JEEP AND SAME SYMPTOMS! i bought the new one from www.autocomputerexchange.net. hopefully the alternator burned it out from bad brushes. i noticed the radio don;t turn on and the gas gage isn;t working. is that controlled by the ECM?
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Unread 03-25-2013, 02:43 PM   #4
idaholtby
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1991 YJ Wrangler 
 
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Quote:
Originally Posted by xpdude View Post
ok. update!!! ECU is bad and not working right. runs but skips and backfires. I TRY THE UNIT IN SOMEONES JEEP AND SAME SYMPTOMS! i bought the new one from www.autocomputerexchange.net. hopefully the alternator burned it out from bad brushes. i noticed the radio don;t turn on and the gas gage isn;t working. is that controlled by the ECM?
So the rig runs fine now with the new to you ECU? Only now you have issues with the gas gauge and radio, not before?
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Unread 03-29-2013, 07:17 PM   #5
xpdude
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1995 JK Wrangler 
 
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acually no. i think the dist is off, won't start. i installed it according to hynes and it just backfires, fire order is right. i got it to run on 1 cyl only.
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Unread 03-30-2013, 05:23 AM   #6
Que89YJ
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1989 YJ Wrangler 
 
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Fuel gauge is independent. Set the timing. Then clear the ecu by disconnecting the battery and recheck codes.
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Unread 03-30-2013, 02:51 PM   #7
xpdude
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1995 wrangler non running need help

i bought this 1995 YJ non running. It won,t run and pops and backfires like the timing is off. we set the new timing chain according to the book: line the two dots side by side, rotate and count 20 links on the chain dot to dot. i have compression, 150psi cyl 1-2-3- and 4 160psi. we set the distributor on the cyl 1 compression stroke, and set the harmonic balancer to the (0). still is isn't running. with the engine at TDC (0), the cam dot is 360 off, is that right? Do you guys have a picture of the distributor installed with the rotor position as the engine is at top dead center? it appears to me the camshaft could be broke, because at top dead center the cam dot is 360 degrees away from the crank dot.
img_20130330_150221.jpg   img_20130330_150302.jpg   img_20130330_150303.jpg   img_20130330_150309.jpg  
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Unread 03-30-2013, 02:57 PM   #8
xpdude
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this is how we installed the chain. the crank has a very faint dot but its there and lined up.
379187_10152603189765122_1539501020_n.jpg  
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Unread 03-30-2013, 03:09 PM   #9
xpdude
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so i am wondering what we are doing wrong. the 1st pic is where we put the distributor at TDC (0) on the harmonic balancer.
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Unread 04-01-2013, 02:05 PM   #10
xpdude
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can anyone shed some light on distributor installation? what about the timing chain? at compression its 360 off dot at the top?
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Unread 07-05-2013, 03:39 PM   #11
Badyj7
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I'm having a similar problem did u ever figure it out
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Unread 05-08-2014, 11:45 AM   #12
xpdude
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i believe the cam was snapped off somewhere i have yet to pull out the cam. in the mean time i got a new engine with 160k runs good has the chain rattle though.
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Unread 05-08-2014, 12:34 PM   #13
Que89YJ
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Cam was snapped and he still got good compression? weird.
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Unread 05-16-2014, 02:31 PM   #14
xpdude
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the dist was off a tooth wouldn't go to 3 oclock position
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