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Posted on Jan 02, 2017
SOURCE: jeep cj won't idle
Assuming that the jeep has not been modified it is likely the Carter BBD Carburetor on that engine, or the sensor inputs to the carburetor.
The Carter BBD has an idling circuit that is always seeking. There is a stepper motor that keeps changing the rpm, and fuel mixture. It basically never stabilizes, and it keeps adjusting based on the feedback loop from half a dozen or so sensors.
So, if a sensor goes bad and feeds a constant signal to the carb, you get problems.
The Carter BBD is a very difficult carb to rebuild and is usually fairly dear in terms of cost.
If you can find a Jeep factory repair manual (on ebay) on the 85 cj -- it is an olive green manual about 3 inches thick and is usually not too expensive, it has troubleshooting procedures for the BBD. Don't get a Haines or aftermarket manual. get the olive drab official factory manual
Remember it is probably the carb that is bad, but there may be more to it than just that.. I don't remember all the inputs to the stepper motor circuit, but I do know that EGR valve is one of them.
Posted on May 16, 2009
First, get out the ol' volt ohmmeter. Check the bulbs for continuity, check the sockets for power and good ground. check fuses. check the switch, check relays. Your vehicle does not have any"mysterious"modules...power needs to get to the switch, then through the wiring to the bulbs. armed with your meter and perhaps a test-light, you can easily trace both ways from the switch to the power source and the bulbs. Only thing you need is time and a bit of patience.
Posted on Sep 23, 2009
If its a stick you may have a problem with the clutch safety switch. They don't want you starting the jeep without the clutch in. If the safety switch has failed it may think the clutch is still released. Also make sure the battery terminals are clean. If your lights don't shine bright you need to start looking for a connection issue to the battery if you know the battery is good.
Posted on Feb 06, 2010
You will have to take the door panel off. Roll the window down/up about 1/2 way. Look at the channel were the bottom of the glass sits. There are most likely a couple of screws, 1 near each end. Loosen them up and remove the glass by holding on to it while lowering the assembly all the way (crank it down. Tilt one end up and lower the other. Glass should come out of the track. Reverse to replace the new glass.
Posted on Mar 15, 2010
Testimonial: "need to replace window regulator on passanger side"
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