1995 wrangler flooding out with gas RUNS and BACKFIRES at idle quits 1 min of running - JeepForum.com

 
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post #1 of 14 Old 02-13-2013, 05:04 PM Thread Starter
xpdude
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1995 JK Wrangler 
 
Join Date: Feb 2013
Location: elgin
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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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post #2 of 14 Old 02-13-2013, 05:28 PM
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.

1998 ZJ 5.2 Auto

1989 Wrangler Black Bone Stock 2.5l 5spd
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post #3 of 14 Old 03-25-2013, 11:49 AM Thread Starter
xpdude
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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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post #4 of 14 Old 03-25-2013, 02:43 PM
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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post #5 of 14 Old 03-29-2013, 07:17 PM Thread Starter
xpdude
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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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post #6 of 14 Old 03-30-2013, 05:23 AM
Que89YJ
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1989 YJ Wrangler 
 
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Location: Detroit
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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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post #7 of 14 Old 03-30-2013, 02:51 PM Thread Starter
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.
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post #8 of 14 Old 03-30-2013, 02:57 PM Thread Starter
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.
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post #9 of 14 Old 03-30-2013, 03:09 PM Thread Starter
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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post #10 of 14 Old 04-01-2013, 02:05 PM Thread Starter
xpdude
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1995 JK Wrangler 
 
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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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post #11 of 14 Old 07-05-2013, 03:39 PM
Badyj7
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I'm having a similar problem did u ever figure it out
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post #12 of 14 Old 05-08-2014, 11:45 AM Thread Starter
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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post #13 of 14 Old 05-08-2014, 12:34 PM
Que89YJ
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Cam was snapped and he still got good compression? weird.
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post #14 of 14 Old 05-16-2014, 02:31 PM Thread Starter
xpdude
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1995 JK Wrangler 
 
Join Date: Feb 2013
Location: elgin
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the dist was off a tooth wouldn't go to 3 oclock position
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