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Unread 04-08-2011, 07:31 PM   #1
jmcdowell072887
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1983 FSJ Cherokee 
 
Join Date: Oct 2010
Location: colorado springs, Colorado
Posts: 7
Fuel Issue

I got a 83 cherokee chief laredo and it starts, idles, revs, and accelerates fine til i hit 45 mph. Once i get there it begins to sputter. I took off the fuel cap and drove around to see if would help but no luck. My next guess is to check the fuel filter but i cant locate it. Any further guidance to the location of the filter or what could be causing the issue would be appreciated

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Unread 04-08-2011, 08:00 PM   #2
pleontks
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1976 J-Series Truck 
 
Join Date: Apr 2010
Location: Whetstone, Az
Posts: 1,130
there is probably one inside the driver side frame rail. Make sure you squeeze the lines off before removing the filter.
If that doesn't work, start looking at the fuel pump
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Unread 04-09-2011, 02:42 AM   #3
ISlapFatKids
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1995 ZJ 
 
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Location: Arizona
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I would assume it's the fuel filter, too. I had an old Blazer I picked up for less than $500 with the same issue (even at the same speed). All she needed was a new filter (for a while).

And as pelontks stated, the fuel pump would be my next guess, aswell. Learned about that thanks to that crappy old Blazer, too.

Last thing I know about would be to re-tune your carburetor, but that can be a PITA your first time or two, especially depending on what carb you have.
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Unread 04-15-2011, 05:38 PM   #4
jmcdowell072887
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1983 FSJ Cherokee 
 
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Location: colorado springs, Colorado
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ok so i swapped fuel filters and it drove fine for a day. Then it got to the point where it wouldn't even move and once i hit the gas it would die. So i put a new fuel pump on it started it up and went for a ride and it died. so today i bottle fed the carb and watched the fuel as it pumped out the line feeding the carb and it was pumping like it should and even with the direct feed from the bottle it still died. I then took the air filter off and messed with the levers on the carb (not sure what i did) and it started up idled for 20min then i drove it up the road going 45mph turned around and came back doing 50mph. on the way back it sputtered a lil bit but still ran good after i backed off. Just wondering if it sounds like there a problem with the carb or if disconnecting the auto choke on the carb may fix it
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Unread 04-15-2011, 08:20 PM   #5
pleontks
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Quote:
Originally Posted by ISlapFatKids View Post
I would assume it's the fuel filter, too. I had an old Blazer I picked up for less than $500 with the same issue (even at the same speed). All she needed was a new filter (for a while).

And as pelontks stated, the fuel pump would be my next guess, aswell. Learned about that thanks to that crappy old Blazer, too.

Last thing I know about would be to re-tune your carburetor, but that can be a PITA your first time or two, especially depending on what carb you have.
haha. I learned on my 84 chevy 3/4 2wd that I got for 250


When doing the fuel line check, I usually blow some air down the line into the tank to clean out the sock on the end of the pickup. Of course, I usually end up dropping the tank and never fix the blown-out sock. I'm sure it's not the best to do, but I haven't had a problem yet
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Unread 04-19-2011, 08:08 AM   #6
sinac4life
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Join Date: Jan 2010
Location: Berthoud
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There could be some carbon build-up in the carb. but unless there is a ton of stuff in there, it shouldn't affect it that much. I would make sure that the gas isn't vapor locking in the carb. That happened to mine and that ended up being the problem. Just make sure your cooling system is working right. Also, it could be that there is too much air going in and the fuel/air mix isn't right.
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