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Unread 02-13-2012, 07:58 PM   #1
94chb
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1989 YJ Wrangler 
 
Join Date: Dec 2009
Location: Whitwell, TN
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Engine idles at 3k

hey guys, my buddy has a 95 wrangler 2.5 the jeep ran great but the water pump was bad so i replaced it for him now when you crank the jeep it stays at 3k and wont idle down. ive looked for vacuum leaks and didnt find anything. idk what the hell the problem is . maybe you can help.

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Unread 02-13-2012, 08:03 PM   #2
dilligaf69
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1998 ZJ 
 
Join Date: Nov 2008
Location: Tucson, Arizona
Posts: 89
Make sure that you didn't by some chance move the throttle cable, check to make sure the butterfly on the throttle body is closed. I know you didn't have to mess with it while changing the water pump, but there is always that chance.
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Unread 02-13-2012, 08:04 PM   #3
94chb
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Location: Whitwell, TN
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i checked i also choked it with my hand and it still didnt idle down.
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Unread 02-13-2012, 08:30 PM   #4
pasinbuy
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First try cleaning the IAC it is on the pass side of the throttle body. If that does not work, go buy a new one.
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Unread 02-13-2012, 08:31 PM   #5
dilligaf69
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double check all of you manifold vacuum lines to make sure they didn't get cracked. only other reason I can think of is for some reason the idle speed control motor has gotten stuck open or has gotten disconnected. That shouldn't have been affected by changing the water pump though.
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Unread 02-13-2012, 08:34 PM   #6
94chb
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1989 YJ Wrangler 
 
Join Date: Dec 2009
Location: Whitwell, TN
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but even with me sticking hand hand over the TB and choking it should have idled it down. ive checked and checked and checked. ill wait til tmw to look again. im stumped.
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Unread 02-18-2012, 09:30 PM   #7
94chb
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1989 YJ Wrangler 
 
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Location: Whitwell, TN
Posts: 1,956
Fixed the Problem. Bad intake manifold gasket. replaced it and everythign is perfect.
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Unread 02-21-2012, 09:00 PM   #8
dilligaf69
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1998 ZJ 
 
Join Date: Nov 2008
Location: Tucson, Arizona
Posts: 89
good to hear you got it fixed. That would have been my next guess if it wasn't the IAC.
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