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Old 09-10-2011, 04:46 PM   #1
Join Date: Sep 2011
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Question 95 Jeep Wrangler 4.0L, Chugs On Acceleration and back fires sometimes

I have a 95 Wrangler 4.0 It starts and idles fine, however after driving it starts sputtering like it is not getting fuel. This only happens when driving if stopped and idling it runs fine. The problem is not constant and only seems to be happening after diving a short while, after 10 to 15 miles, and seams to do it more in the mornings when itís cooler out temps in the mid 60ís, never seams to do it on the way home in the evening. I can clutch it rev it up and to about 3 grand and it will pop and back fire for a few seconds and then start running fine again for a few miles. This always happens after riding at a constant speed. What I have replaced; Plugs are less then two years old and are Bosch Platinum Plus, in the last few days Iíve replaced, the Plug Wires, Cap & Rotor, and then the coil. And Iím still chasing my tail. Can you help? What am I missing????

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Old 09-10-2011, 05:26 PM   #2
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Originally Posted by Kcrowell View Post
.... Plugs are less then two years old and are Bosch Platinum Plus,....
You can start by installing OE type spark plugs, then get back to us.

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Old 09-11-2011, 07:29 AM   #3
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No help here

Well the plugs came from my local parts store, I give them the make and model of my Jeep and they had about ten different makes of plugs I could have got and all of them where OM replacement plugs, so I picked Bosch. And like I said they have been running find for about two years. I have pulled the plugs and checked them, and all looked find. It looks like this Forum is not going to be any help for me I guess I will look somewhere eles.
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Old 09-11-2011, 08:47 AM   #4
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First off bosch plugs arnt the problem I run the platinum 4s. Start with checking the tps, vaccum lines, air step thing its the other plug on the throttle body.
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My YJ Build +1.5 inch SOA ,37 12.50 15R Swamper M16's, 5.22:1/2.97:1 Stak Tcase with 92 Crawl Ratio--------SOLD...
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