Question about 1993 Jeep Grand Cherokee

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93 jeep grand cherokee starts up and idles low. When you put it in drive or reverse it stalls out. We changed the throttle body positioning center and other things. if you could please get back to us as soon as possible. It is much appreciated. 517-917-8207. or 406-600-8044

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If you have changed all of these parts, being that they are electronic you need to disconnect the negative battery cable for approximately 30 minutes to allow the computer to reset itself and clear any codes that might be in the system. If you have any further questions be free to call me at 601-270-4309 central time.

Posted on Oct 04, 2009

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Sounds like the torque converter in the transmission may be locked up. The torque converter kinda acts as the "clutch" in an automatic. If it locks up then it won't allow the engine to turn freely while the transmission is in gear so when you place it in gear it will cause the engine to stall. Kinda like popping the clutch in an manual transmission.

Posted on Jan 17, 2010

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1 Answer

2002 jeep stalls, no idle or mixture valve on throttle body


When it stalls is just as important as that it stalls. Random stalling while driving and re-starting after a wait can generally be traced to either a bad fuel pump or a failing crank position sensor. Neither component is cheap so I'd do some testing before replacement. All Jeeps have an idle control valve and throttle position sensor. Control valves can get gummed up. Control valves can usually be cleaned out by spraying carb cleaner into the passage in the throttle body bore. In severe cases, the control needs to be removed. If you remove it, DO NOT turn the part that goes inside the TB...just spray it off and clean inside the TB. Make sure you don't lose the small "o" ring. Test procedures are outlined in both Chilton and Haynes manuals. BEFORE doing any testing, verify that all your fuses are good in the power distribution center and inside the drivers compartment. You can also get a free scan done at most larger parts stores. OK, I've given you the most common reasons for stalling...There are others but testing all systems is the only way to determine that.

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make sure your idle air control motor is working, if you give and hold gas pedal a little will it stay running in drive.

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1 Answer

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Does this thing have a throttle body that looks like a computer-controlled carburetor?

If so, start motor and verify that it behaves irratically and then stalls.

then, spray WD-40 liberally around base of throttle body where tb meets intake manifold.

Start motor...

Does the problem go away, at least whilst for a little while?

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A faulty gas cap can cause the sensor to come on.
Clean out the throttle body with a cleaner and see if the idle improves.

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