1989 xj high idle 1500-2500 after motor swap
02-21-2016, 05:39 PM
#1
Newbie
Thread Starter
Join Date: Feb 2016
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
1989 xj high idle 1500-2500 after motor swap
Recently I tried to do a 4.7 stroker swap on my xj motor was bad so I put old motor back in which ran fine replacedexhaust manifold cps map sensor now I'm fighting with run away idle 1500 rpm an up I just replaced intake gasket with no luck I'm at a loss if anyone has a idea what to test I would be very grateful!!!
02-21-2016, 05:45 PM
#2
CF Veteran
Join Date: Nov 2010
Location: In the middle of Minnesota!
Posts: 5,804
Received 99 Likes
on
88 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
Sounds like a massive vacuum leak. Have you verified each and every vacuum component and vacuum line in the engine bay? Sure you are on the dowel pins properly when seating the manifold?
Last edited by tjwalker; 02-21-2016 at 05:50 PM.
Thread
Thread Starter
Forum
Replies
Last Post
bassxj
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
12
03-24-2016 12:38 PM
ZacChamp
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
3
02-17-2016 12:36 PM
scatgo
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
02-16-2016 02:48 AM
Es Heff
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
02-15-2016 07:09 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)