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Old 09-10-2011, 11:55 AM   #1
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Question 95 Jeep Wrangler 4.0L Chugs On Acceleration

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 it’s cooler out temps in the mid 60’s. 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 ride 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 I’ve replaced, the Plug Wires, Cap & Rotor, and then the coil. And I’m still chasing my tail. Can you help? What am I missing????

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Old 09-10-2011, 12:40 PM   #2
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Try the guys in the YJ forum. They have more experience with that engine.

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Old 09-10-2011, 02:09 PM   #3
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Quote:
Originally Posted by Kcrowell
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 it’s cooler out temps in the mid 60’s. 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 ride 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 I’ve replaced, the Plug Wires, Cap & Rotor, and then the coil. And I’m still chasing my tail. Can you help? What am I missing????
Yep- wrong forum but....

Couple years on the plugs that's a lot of driving on Bosch plugs, my 4.0 ran good for a couple thousand miles on them
Then it started missing.
My advice-- change the plugs
Why would you change the cap/wires and still use the same plugs?
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