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Old 02-11-2010, 12:56 AM   #1
carlyj's Avatar
Join Date: May 2009
Location: Las Vegas, NV
Posts: 180
CHOKE.. me.

I've been having lots of stability issues with my 89 YJ. One thing I have to fix right away is this problem I'm having with my choke, I'm assuming. When I turn the my YJ on for the first time in the morning, the RPMS ramp all the way up to nearly 2500 RPM. It will gradually start to go down as the Jeep warms up, but it still sits at 1500-1700 even when it reaches operating temp. If I wait a few minutes after I start her up I can tap the gas a few times and then she just dies. I'm guessing when I hit the gas, some cam is disengaging in the choke that just closes / opens it all the way. If I tap the gas after it reaches operating temperature it goes down to 900-1000 RPM and it normalizes after that.

I swapped my carb out for the MC2100 and I've done the nutter.

How can I fix this 2500 RPM and sudden drop when I rev'r up problem?

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Old 02-11-2010, 01:24 AM   #2

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You need to adjust the fast idle cam on the choke.
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Old 02-11-2010, 01:55 PM   #3
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Join Date: May 2009
Location: Las Vegas, NV
Posts: 180
Originally Posted by Fweaky View Post
You need to adjust the fast idle cam on the choke.
Fweaky- Thanks. I think I've got it adusted now. I took the choke off and replaced the gasket and readjusted it and now my car backfires and black smoke
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