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Old 08-16-2010, 11:54 AM   #1
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Exclamation Motor heads HELP jeep sputters

My 94 4cyl sputters always when I acccelerate from a stop, if I dont puch it first it will die. When just driving along it sometime sputters when I accelerate and sometimes does not. While drive in town is sputters often but when on the highway it sputters only occasionally. I can smell gas when it is at its worst and my fuel economy has gone to heck. So far I have changed the Plugs, wires, O2 sensor and fuel filter, all of which by appearance needed changed. I have inspected and cleaned the throttle body and distributor, I also checked all the vaccum lines. I added Lucas injector cleaner and seemed to improve slightly but it is hard to tell because some days it drives worse than others. My thought is to add seafoam to the next tank just because I am out of ideas. I have found many post throughtout the internet from people having the same problem but I can find where anyone posted what fixed it. Desperatly seeking advice.

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Old 08-16-2010, 02:33 PM   #2
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Did you run codes to see what is wrong?
Clean your throttle body.

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Old 08-16-2010, 04:09 PM   #3
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Throttle Position Sensor maybe?
What troubles me more though is that you can smell gas. Sounds like you may have a fuel leak somewhere. And where you have fuel leaking out, you've got air getting in. Air in your fuel lines will cause sputter. Check your fuel lines from the engine all the way back to the tank.
You also have rubber hoses directly above the fuel tank before they connect to the steel lines. These rubber hoses may have deteriorated or the clamps may be loose. Problem is you'll have to drop the tank in order to check them.
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Old 08-16-2010, 04:20 PM   #4
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It could also be your fuel pressure regulator.
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Old 08-16-2010, 05:40 PM   #5
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Sounds more like a clogged cat. The smelling of the gas in a strong indicater. Do the code check and see if the O2 sensor code pops up. Another thing that will throw it off is the TPS and/or the CPS sending bad signals to the ECM which inturn makes it run rich which overloads the cylinders with more gas than it can burn and causes the gassy smell. I posted the codes in another thread and will find it and copy/paste back here for you..
BTW. incase you aren't sure how to get the codes,,, turn the ign switch from off toRUN position 3 times stopping in the run position and waiting for the CEL (check engine light) to start blinking the codes.
blink pause blink blink=12 etc... 12,33 and 55 are normal codes if you do not have a/c. Just a mental note for you.
EDIT: here is the codes and what they are in reference to..

http://www.jeepforum.com/wiki/index....k_Engine_Codes
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Old 08-16-2010, 08:09 PM   #6
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Praise be it is finally fixed!!! Thanks for the help. I looked over the throttle position sensor and the spring worked freely so I thought it was OK. It was the cheapest part to change that I had not already changed so I thought might as well and that was the problem all along, or maybe just the last problem. The good news is that everthing I changed needed it anyway except maybe the O2 sensor and I learned a lot. WOOHOO no more "I am sorry dude" looks from other jeepers.

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