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Old 03-22-2007, 09:16 PM
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Vacuum Leak

I have just recently bought a 88 wrangler and I'm having some trouble finding a vacuum leak. When it heats up it gets really bad. Only when I'm going forward and hit the breaks it trys to stall. I'm wondering about the stock carb. Any suggestions.
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Old 03-22-2007, 10:09 PM   #2
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well mine does the same thing, except mine is a 93, and it stalls when i slow down, and sometimes dies. still trying to find the problem..

1993 yj, 4.10s, hardtop
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Old 03-23-2007, 11:22 AM   #3
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Your 88 has a carb. They put really crappy carbs on Jeeps. Weber makes a good carb to swap in. If you have the means you should get yourself a fuel injection system to throw on. You need to find some way to get rid of that carter carb.
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Old 03-23-2007, 03:15 PM   #4
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the easiest way to find a vac leak is to go buy a can of starting fluid and start spraying it on the vac lines while the jeep is running. when you hear the rpms go up you found the leak.
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Old 03-23-2007, 09:06 PM
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I have sprayed carb cleaner all over the hoses and I even sprayed it straight into the carb and it did not change the rpm's any. Thats why I was wondering if the carb was messed up. Is a weber the best way to go. I also heard something about a cm 2100 or something.
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Old 03-28-2007, 08:29 AM   #6
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Spray the carb cleaner around the accelerator pump lever and on the out side of the throttle body on the carb. I'll bet that is where the leak is. You can also put a straw from a can ow WD-40 in the vents on the throttle body. Take off the air cleaner assembly, look into the carb. On the front of the throttle body will be two vents (usually black in color) that look like jets. put the straw into one of the vents. If the engine starts running better you have a vacumn leak in the carb. Also spray the carb cleaner on the intake manifold gasket. These are both very common vacumn leak problems.

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