Rough idle with AC on
04-18-2013, 06:35 PM
#1
Junior Member
Thread Starter
Join Date: May 2012
Location: CMC=7 Blocks from the Atlantic
Posts: 74
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
Rough idle with AC on
My 01 XJ with 178K ran great all winter. I put new Champions in it last June. Everything else works/runs great but I put the AC on the other day when we had a temp. Spike and it would idle pretty rough especially when in gear in reverse or even stopped at a light. What's causing this? I know the plugs are good, air filter is good and it runs great without AC.
04-18-2013, 09:11 PM
#2
Senior Member
check your voltage, get you battery tested....also when was the last time you coolant was changed? is it running at 210? any heat soak issues? those pre cats on the '00 and '01 XJ's make the engine compartment really hot and IMO puts a strain on the a/c system to keep it cool.
04-19-2013, 02:12 PM
#3
Junior Member
Thread Starter
Join Date: May 2012
Location: CMC=7 Blocks from the Atlantic
Posts: 74
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
check your voltage, get you battery tested....also when was the last time you coolant was changed? is it running at 210? any heat soak issues? those pre cats on the '00 and '01 XJ's make the engine compartment really hot and IMO puts a strain on the a/c system to keep it cool.
I rule!
04-19-2013, 03:49 PM
#4
CF Veteran
Join Date: Sep 2011
Location: Riviera, Texas
Posts: 4,172
Likes: 0
Received 4 Likes
on
4 Posts
Year: 1998 Sport
Model: Cherokee
Engine: 4.0
I would recheck the plugs too for fouling. Plugs have been known to foul if something isn't 100% Recheck the gap Make sure it's at .035. When was the last time you gave it a full tune up. Plugs, wires and everything else that goes with it?
04-19-2013, 06:53 PM
#5
Junior Member
Thread Starter
Join Date: May 2012
Location: CMC=7 Blocks from the Atlantic
Posts: 74
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
Trending Topics
04-21-2013, 04:20 PM
#10
Junior Member
Thread Starter
Join Date: May 2012
Location: CMC=7 Blocks from the Atlantic
Posts: 74
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
04-21-2013, 05:00 PM
#12
CF Veteran
Join Date: Aug 2010
Location: Canton, MI
Posts: 8,357
Likes: 0
Received 82 Likes
on
67 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
Remove the TB, remove the sensors, clean the TB completely, including the orifice where the IAC pintle seats. Be careful cleaning the IAC pintle, use a tooth brush and some MAF cleaner. You can use TB cleaner on the TB but be cautious using it on the pintle. Reinstall the TB using a NEW gasket.
04-29-2013, 12:46 PM
#13
Junior Member
Thread Starter
Join Date: May 2012
Location: CMC=7 Blocks from the Atlantic
Posts: 74
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
10-03-2017, 02:22 PM
#14
Newbie
Join Date: Jun 2015
Posts: 11
Likes: 0
Received 0 Likes
on
0 Posts
Just had the same problem on my 99 xj, except all the time the idle would seem like a bad IAC or tps, replaces both of them & turns out I was low on AC refrigerant and it was working it’s *** off to cool the car, but all the time for me. So mechanic is refilling it and I’m picking it up soon to see how that worked.
My 01 XJ with 178K ran great all winter. I put new Champions in it last June. Everything else works/runs great but I put the AC on the other day when we had a temp. Spike and it would idle pretty rough especially when in gear in reverse or even stopped at a light. What's causing this? I know the plugs are good, air filter is good and it runs great without AC.
Thread
Thread Starter
Forum
Replies
Last Post
Jamesmon4
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
1
08-16-2016 09:04 PM
Tcq192
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
10-23-2015 09:25 AM
15XJ
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
09-10-2015 11:17 PM
Bankerburt
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
0
09-08-2015 10:29 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)