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dragtime92
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Feb 14, 2009, 1:13 PM
Post #1 of 13
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heres a tough one
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1986 jeep comanche 2.5L ok we have bought a fuel filter and pump and seems to work we let it sit for the longest time dont no how long tho just sat there day after day then went to fire it up no good we thought it mite have been the carb. its a single barrel but i wouldnt think that would be it any suggestions would be nice could it be the cause of it sitting there gas would need to be fed through the car it will start then and then die once it is all out
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 14, 2009, 4:30 PM
Post #2 of 13
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Re: heres a tough one
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Just what are you saying - It starts up and just dies out?
If it just cranks and doesn't even sound like it wants to start find out what's missing - spark or fuel. If fuel it would react to starting fluid sprayed in the carb and sputter and die out perhaps. Spark should be checked at a plug wire,
T
Doesn't necessarily need a carb from sitting.... May need a fuel filter or pump??
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dragtime92
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Feb 15, 2009, 12:28 PM
Post #3 of 13
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Re: heres a tough one
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the filter and pump have been replaced and still no luck could itbe the barrel that has went bad in it there is spark because you can continue to poer gas into the carb and it runs just when u stop it stops runing so i was guess that it was THE BARREL THAT WENT BAD WHAT DO U THINK sorry i didnt mean to hit caps
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Todd Norton
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Feb 15, 2009, 1:49 PM
Post #4 of 13
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Re: heres a tough one
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check for a restriction between the fuel pump and the carb , also remove the fuel hose or line from the end at carb , have someone crank the engine over for you while you direct any possible flow of fuel into some kind of container (be safe) if you have flow you probably have poor gas if not (and fuel pump is new)you need to check the fuel line from the fuel pump inlet all the way to the fuel tank sending unit . these lines are often rusty and may not be intact remember 1 pin hole in line and you get air instead of fuel hope this helps good luck Todd
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Loren Champlain Sr
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Feb 15, 2009, 3:11 PM
Post #5 of 13
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Re: heres a tough one
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Not real common, but the float may be stuck in the 'up' position keeping fuel from entering the float bowl. Lightly tap on the fuel bowl, it may release.
Loren
SW Washington
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Feb 15, 2009, 4:47 PM
Post #6 of 13
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Re: heres a tough one
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Good one you ole dog Loren! That was more common then we remember - or then again was it? I can't remember. You know what they say - "Your memory is the second thing to go'' ----- and I'll be damned if I can remember what the first was??
T
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dragtime92
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Feb 15, 2009, 4:47 PM
Post #7 of 13
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Re: heres a tough one
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ok we checked all the others my buddies guess was that it is still the single barrel that is in the carb gas goes up to the carb but not in it so we now know the issue is with the carb any more suggestions
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Loren Champlain Sr
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Feb 15, 2009, 5:05 PM
Post #8 of 13
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Re: heres a tough one
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>>ole dog Loren<< Hey! I resemble that remark. Actually, it was rather common on Q-Jets that had been sitting for a while. A nice, sharp, smack would usually set them free to do all of their other common quirks.
Loren
SW Washington
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Loren Champlain Sr
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Feb 15, 2009, 5:10 PM
Post #9 of 13
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Re: heres a tough one
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dazed; You mentioned in your first post that this was a 4 cyl, one barrel carb. Which means, it only has ONE barrel. As in ONE venturi. The barrel (venturi) don't go bad. Could you be referring to something else? It should have a fitting on the front where the fuel line connects and a vent hose connected to the fuel bowl that goes to the vapor cannister (for emissions). The vapor cannister has a check valve on it. Sometimes, it will go bad, allowing charcoal into the fuel bowl. If the carb float sinks, fuel can come out of the bowl and end up in the vapor cannister. Your problem, though, sounds like a lack of fuel.
Loren
SW Washington
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way2old
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Feb 15, 2009, 5:14 PM
Post #10 of 13
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Re: heres a tough one
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Gentlemen, the 2.5L has a TBI unit. Blown fuses, crimped wires, or plugged injectors might be the problem. The 2.6L V6 has a carburetor.
Being way2old is why I need help from younger minds
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Todd Norton
User
Feb 15, 2009, 5:20 PM
Post #11 of 13
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Re: heres a tough one
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good call
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Loren Champlain Sr
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Feb 15, 2009, 5:29 PM
Post #12 of 13
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Re: heres a tough one
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Gentlemen? Hey, watch the name calling!
Geeeeeeez, shoulda caught that one!
Loren
SW Washington
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way2old
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Feb 15, 2009, 5:37 PM
Post #13 of 13
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Re: heres a tough one
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Trying to present a professional image. Tom taught me well. 
Being way2old is why I need help from younger minds
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