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Old 07-10-2010, 06:01 PM   #1
Join Date: Jul 2010
Posts: 2
Question Please help im pulling my hair out!!!

91 yj 6 cyl when going down the road it starts to spit and sputter and just want to die out but will still idle. I figured out that when you turn the key off and start it again it runs fine until the nest time i slowdown to turn a courner or for a stop sign this is nuts and we cant fugure it out. I have checked the injectors,put a new O2 sensor and cleaned everything i could with the fuel system and it has alot of pressure in the fuel rail. this thing will sit there and run perfect at idle and revs up with alot of power and response we didnt change the fuel pump because the fuel pressure stays ok i dont know what to do so maybe someone could help so thanks in advance for the advise! Is there any chance that the fuel pump has a relay and its bad and when i chut it off and start it up agin it runs fine like im resetting the relay.

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Old 07-10-2010, 06:22 PM   #2
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did you change the fuel filter?

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Old 07-21-2010, 12:32 AM   #3
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yep changed the fuel filter
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Old 07-21-2010, 01:33 AM   #4
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Drop the tank and clean it out. Check the fuel pressure at the fuel rail.
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Old 07-21-2010, 01:38 AM   #5
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Sorry for the Echo, but check the fuel filter. Your gas tank could be full of who knows what kinda' crap.
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Old 07-21-2010, 04:04 AM   #6
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Join Date: May 2010
Location: Santa Ana, CA
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I had the same problem. After 2 fuel filter/pumps I changed the Crankshaft Position Sensor and all was great, not sure if the Yjs have them.
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Old 07-21-2010, 11:16 AM   #7
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x2 on the crank sensor. also might check the distributor. worn shafts, carbon tracks. ignition wires, crack in cap. a few things I can think of.
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Old 07-21-2010, 04:31 PM   #8
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If it's happening when you are into turns and stopping then I would say take the tank down and check the catch hose in the tank. They are notorious for getting holes in them and when you make the turns it is sucking air instead of fuel causing the stumble at turns and stopping. Have you noticed if this happens when the tank is at less than full and does it do it while topped completely up?

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