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Unread 11-27-2012, 05:04 PM   #1
Rio_Grande
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1997 TJ Wrangler 
 
Join Date: May 2004
Location: IN
Posts: 179
2.5l stalling and bogging with backfire

Hello
I have a 97 tj with a 2.5 manual trans. The jeep started bogging out on me after driving a short distance. When it does if you let it idle it will run but if you try to give it gas it Boggs out and if you persist it will backfire in the exaust. If you turn it off it will restart but do the same thing but the occurrence. Will be sooner than before. What I have done since this started is. Now crank position sensor, new cam position sensor, new plugs, wires, cap and rotor. New fuel pump (shop diagnosis of problem never made it home) pulled the head new valve job, new exaust manifold. Cleaned the intake by spraying, haven't pulled all the sensors yet. Unplugged the front o2 sensor with no change. When I put it back together from the head rework, it acted like it was fixed but the other night when it was cold I started it up and it did it within a few feet of the drive. I limped around the block and it straightened up by the time I got around the block.

Any suggestions?

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Unread 11-28-2012, 08:14 PM   #2
rustypig
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1985 CJ7 
 
Join Date: Nov 2012
Location: Hayden, ID
Posts: 19
Sounds like it's starving for fuel to me. New filter with all that too?
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Unread 11-29-2012, 06:23 PM   #3
Rio_Grande
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1997 TJ Wrangler 
 
Join Date: May 2004
Location: IN
Posts: 179
Yes I replaced the filter in the tank when the fuel pump was changed.
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Unread 11-30-2012, 03:21 PM   #4
nightcrawler1
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1974 CJ5 
 
Join Date: Jul 2012
Location: greenwell springs, Louisiana
Posts: 15
This may sound odd, but I had an old truck that had the same symptoms. It was my fuel cap. The cap got stopped up and would not let the tank vent properly. Try to run it with the cap off and maybe this will help.
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Unread 11-30-2012, 04:21 PM   #5
Rio_Grande
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1997 TJ Wrangler 
 
Join Date: May 2004
Location: IN
Posts: 179
We will see, at this point a 9.00 cap is a drop in the bucket!
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