Yes, another rough idling cherokee thread
#1
Seasoned Member
Thread Starter
Join Date: Dec 2012
Location: Santa Cruz Ca
Posts: 412
Likes: 0
Received 3 Likes
on
3 Posts
Year: 1999
Model: Cherokee
Engine: 4.0 HO
Yes, another rough idling cherokee thread
Haha ok so I have been trying to fix this rough idle since I bought it. It seems as if my mpgs have taken a hit also.
99 XJ 4.0 aw4
heres a list of what I've done
Fuel injector cleaner in tank
Cleaned IAC/TB
Fixed header/exhaust manifold leak
New plugs cap rotor wires
Champion coppers.. gapped .35
New upstream o2 NTK
Checked all vaccum hoses brake booster stupid ball under fender (moved from bumper) all look good
sprayed carb cleaner
I am going to oreillys to rent a fuel pressure guage and check it
Heres a video dont know if it'll help any but hoping so you can hear it knock a little at the beginning
99 XJ 4.0 aw4
heres a list of what I've done
Fuel injector cleaner in tank
Cleaned IAC/TB
Fixed header/exhaust manifold leak
New plugs cap rotor wires
Champion coppers.. gapped .35
New upstream o2 NTK
Checked all vaccum hoses brake booster stupid ball under fender (moved from bumper) all look good
sprayed carb cleaner
I am going to oreillys to rent a fuel pressure guage and check it
Heres a video dont know if it'll help any but hoping so you can hear it knock a little at the beginning
#2
Senior Member
Join Date: Jun 2011
Location: Florida
Posts: 759
Likes: 0
Received 2 Likes
on
2 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
Sounds just like my 99'. My idle is rough too though. Sub'd.
I know I have a exhaust manifold crack though. I'm not sure how much that after the idle. Did pretty much the same maintenance as you less the (fixed exhaust leak)
Running refurbished fuel injectors too. Didn't help rough idle but did give it a much faster start and seemingly better MPG
I know I have a exhaust manifold crack though. I'm not sure how much that after the idle. Did pretty much the same maintenance as you less the (fixed exhaust leak)
Running refurbished fuel injectors too. Didn't help rough idle but did give it a much faster start and seemingly better MPG
#3
Seasoned Member
Thread Starter
Join Date: Dec 2012
Location: Santa Cruz Ca
Posts: 412
Likes: 0
Received 3 Likes
on
3 Posts
Year: 1999
Model: Cherokee
Engine: 4.0 HO
Whats the ideal fuel pressure I am looking for?
I need to get a multimeter too so what sort of readings am I suppose to get on my TPS and what else should I test?
I need to get a multimeter too so what sort of readings am I suppose to get on my TPS and what else should I test?
Thread
Thread Starter
Forum
Replies
Last Post
Blackcherokee290
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
27
07-26-2022 07:52 PM
rdr8887
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
08-25-2015 11:12 PM
rdr8887
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
7
08-24-2015 07:48 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)