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post #1 of (permalink) Old 03-25-2000, 07:04 PM
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need the pros on this one!

87yj 258 carter all stock engine, 5 speed. was running great at all speeds like usual. have always had a little problem with the idle since i've owned it two months now. when i would hit a dirt road with wash boards sometimes the motor would die if i let it idle. today on a dirt road it did it again but stayed that way all the way home for 100 miles.

engine runs strong if i am giving it throttle. does not miss or hesitate. when going down hill it's ok as long as you keep it in gear which keeps up the rpm and the engine running. will not coast as it will not idle. when coming to a stop it will die instantly. have to keep right foot on gas with left foot on brake. i am miffed!

can't be timing or plugs -it doesn't miss and starts right up even after stalling on idle.

all vacuum lines look good and connected.

should'nt have to mess with the idle adjustment screws because it was idleing fine.

i associate the rough road somehow relates to the problem as it is the only common denominator. could there be some bad electrical connection with the computer which might have control over the idle?

i mean the engine will shut down as if you turned off the key. it feels like the fuel was shut off.

again it will start right up but will not idle. have to keep the throttle on or it will die.

when shifting it wants to die so fast that the drive train will clunk like when it does if you lug it.

can any of you experts figure this one out? i need some advice!

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post #2 of (permalink) Old 03-25-2000, 08:11 PM
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Re: need the pros on this one!

The washboard road thing and the not idling are probably 2 different things. You are shaking the gas up so bad on washboard that there is not enough plain liquid at the proper level in the float bowl, you are most likely starving the engine. As far as the idle goes, the Carter bbd is notorious for its idle circuit clogging, the solution to that is a simple rebuild. Somehow this even happens with a good fresh filter, I've seen it happen enough to know its not a fluke. The washboard just stirred up sediment in the bottom of the float bowl, got sucked into your idle circuit.

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post #3 of (permalink) Old 03-25-2000, 08:56 PM
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Re: need the pros on this one!

thanks brad. i looked at terry howe's site on the idle problem:
i will take a look at the carb in the am and see what i can find. will look for debris in the float bowl also.
thanks again

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post #4 of (permalink) Old 03-25-2000, 11:16 PM
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Re: need the pros on this one!

Some experience I had with washboards and the two barrel carb on my 89 wrangler, were a dying and not idling also. The washboards seamed to be actually flooding my engine and it was loaded up bad when it would finally start. When you get it running, do you see a lot of black smoke? then a similar problem as mine. I rebuilt my carb, adjusted float height, and slowed down on the washboards. Hope this was of some help. jamey williams.

post #5 of (permalink) Old 03-25-2000, 11:32 PM
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Re: need the pros on this one!

yes.. the washboards shook up the crap in your gas tank.. first thing i would do is check your fuel filter.. replace it. quicker and easier.. if that doesnt do it.. then rebuild the carb.. like was mentioned above.. have seen this plenty of times.. and if you still cant fix it.. check the choke...

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post #6 of (permalink) Old 03-26-2000, 11:45 AM
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Re: need the pros on this one!

well i took apart the carb and cleaned out the idle pickup tubes. they didn't appear to be clogged. to access these tubes you have to remove the choke plate and the venturi cluster. i then removed the air horn and the needle seat assembly. the float now comes out and there was some grime and grains of sand under both float. cleaned all and blew out with compressor. put all back together with same gaskets. runs good again! hope it is resolved!

thanks guys for your input!
keep on keepin' on

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