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post #1 of (permalink) Old 12-20-2000, 09:13 AM
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Engine Stall

My 88 Sahara has been stalling on me when I hit the break hard; the idle drops and sometimes it recovers and back to normal idle, but unfortunately most of the time it stalls. Any and all help is appreciated.
Thanks
Ted

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post #2 of (permalink) Old 12-20-2000, 11:40 AM
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Re: Engine Stall

First check the hose to the power breaks and make sure it is not leaking, or that the diaphram in the break booster is not bleading off vacuum - I doubt this is the problem but worth a quick look.
Probably the idle tubes are cloggin in the Carb , easy fix -Remove air cleaner, remove air cleaner bracket on top of carb. Remove butterfly (choke plate) and butterfly rod, remove two 'screws'just inside the ventura and lift out the idle tubes, they hang below the part that you just unscrewed. Clean out the tubes with a piece of wire and reassemble. I have done this once, and once one of my idle tubes had fallen out and I had to press it back in place.
IMHO - you will not be happy with this setup until you upgrade the ignition. I did the GM-HEI, and love it. Dollars well spent. The TR upgrade is supposed to be even better and cheaper. My '89 Laredo idles perfectly now, and it used to have similar symptoms to what you are describing with your ride. Hope this helps - there is a technical page on the web that spells out what I just described above plus a lot of other cool tricks.

CB

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post #3 of (permalink) Old 12-20-2000, 03:06 PM
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Re: Engine Stall

Had that same problem with my YJ. I upgraded to the TR ignition and replaced ALL the vacuum hoses at the same time. It runs perfectly now and doesn't stall on hard stops.

Tommy B. in AZ -
More Guts than Brains.
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post #4 of (permalink) Old 12-20-2000, 04:00 PM
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Re: Engine Stall

The gas tank purge canister may be bad. When you come to a stop... or suddenly the engine goes to idle the purge valve opens. Then the vacuum sucks up the fumes from the gastank.

But if the canister is bad, it's full of raw gas. So now the vacuum sucks up raw gas and floods the engine and the engine stalls. The vacuum then is disconnected via the purge valve. You restart the car and puzzle over what happened.

At idle clamp of the purge valve vacuum line. If RPM changes, it's likely you've found the problem. Change the canister, it's about $70, and a dealer item.

Happy Holidays and Safe Jeepin'

Larry
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