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Old 08-21-2015, 10:40 PM
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88 YJ straight 6 running rough.

This vehicle has been sitting about 13 years only being run a few times. I emptied the old gas put in 93, put a new carb on it, new wires, plugs, cap, rotor. Check for vacuum line leaks. And it still is very hard to start when cold. Once started it idles up and down, sometimes it's a consistent idle sometimes not. When drive it, it almost always stalls. Iv tried to adjust the throttle screw but it still seems hard to find a consistent low rpm idle. I'm thinking it may need the timing checked? Any help is much appreciated.

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Old 08-21-2015, 10:50 PM   #2
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Checking the timing is a great idea, check your fuel filter too, to rule that out.

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Old 08-22-2015, 01:18 AM   #3
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Timing and fuel filter are Good places to start. Also most carb's jeeps run better with lower octane fuel. Also champion copper plugs are the best to use if you bought platinum plugs that will give you a fit too
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Old 08-22-2015, 01:55 AM
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Thanks I'll get the timing done... only reason I haven't is cause iv never done it before. Ilol buy a timing gun tomorrow and read up on how to properly do it.
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Old 08-22-2015, 07:51 AM   #5
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if it was running good before it sat then none of the adjustments such as timing and carb should need adjusting..they should be fine...chances are that the old plugs are fine too..most likely problems from sitting is bad gas,carb clogged up,carb gaskets dried out or cracked vaccum lines causing vacuum leaks
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Old 08-22-2015, 02:55 PM
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I checked the fuel filters... I could only find 3 and the where all plugged. It runs a lot better now but still startS a little hard when cold. What should it idle at? I have it at about 1200 ... if I set it lower it wants to die.
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Old 08-23-2015, 08:28 AM   #7
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once warmed up it should not have a problem idling at 800 rpm..check for vacuum leaks..check all the hoses including the one going to the brake booster..also plug the brake booster hose momentarily to make sure the brake booster itself is not the vacuum leak
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Old 09-03-2015, 08:31 PM   #8
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Probably the Venturi tubes plugged.
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Old 09-12-2015, 01:33 AM   #9
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Quote:
Originally Posted by harleydragon View Post
if it was running good before it sat then none of the adjustments such as timing and carb should need adjusting..they should be fine...chances are that the old plugs are fine too..most likely problems from sitting is bad gas,carb clogged up,carb gaskets dried out or cracked vaccum lines causing vacuum leaks
What harleydragon said....

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