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post #1 of (permalink) Old 08-27-2002, 01:35 PM Thread Starter
 
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CJ \"Have you experienced this before?\"

CJ-7 4.0 head/elderbrock 500 carb engine runs great lots of power. No detonation detected in 5th gear on long up hills. However, if your throttle up hard and then take your foot off the gas quickly the engine will flutter for a very short period. You will feel four or five slight bucks in a row. If you drive normally you will never experience it. Please let me know if you have experienced this before? Thanks Fran
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post #2 of (permalink) Old 08-27-2002, 02:26 PM
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Re: CJ \"Have you experienced this before?\"

Sounds like there is an off chance it could be some back pressure problem. I drove with a bad header for a couple of weeks and experenced the same problem. As long as the engine was pulling it ran fine (a little loud, but fine) when when you took your foot off the gas, or depressed the clutch at high RPM the engine would do the same thing. Kind of flutter and kick a bit. So if by chance you have a small exhaust leak... Maybe it got bigger than you thought??? Just a thought.
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post #3 of (permalink) Old 08-27-2002, 02:41 PM Thread Starter
 
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Re: CJ \"Have you experienced this before?\"

I do have a small exhaust leak just before the cat. However I did not experience this behavior before fixing the leaky intake manifold. While doing that job I rejetted the carb to a slightly richer mixture. The jeep really idles smooth now and performs great. Maybe before with the leak and all I could not detect the bucking. Thanks for your time Fran
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post #4 of (permalink) Old 08-27-2002, 09:05 PM Thread Starter
 
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Re: CJ \"Have you experienced this before?\"

Can anyone else offer any ideas on this subject? Thank you for your support Fran
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post #5 of (permalink) Old 08-28-2002, 05:45 AM
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Re: CJ \"Have you experienced this before?\"

I had this problem once with my float in the carb. If I ran it hard the float would stick on the sides of the bowl because the hinges were worn. The bowl would fillup with fuel and took a number seconds of coughing and spitting to clear itself out. But I didnt have a your type of carb. It was on an old carter 1bbl.
post #6 of (permalink) Old 08-28-2002, 06:14 AM
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Re: CJ \"Have you experienced this before?\"

My guess would also be the float in the carb. However it sounds like a level issue. I'm thinking that it is too low, and when you get out of the gas pedal, the remaining gas in the bowl shlosses(sp?) forward and starves the engine for a few seconds till it refills.
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post #7 of (permalink) Old 09-01-2002, 07:23 PM Thread Starter
 
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Re: CJ \"Have you experienced this before?\"

Has anyone else experienced this problem before? Thanks for your support
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