runs bad when cold.
#1
Member
Thread Starter
Join Date: Aug 2009
Location: Virginia
Posts: 231
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2000
Model: Cherokee
Engine: 4.0l
runs bad when cold.
when i first start my 90 4.0 it runs bad until it warms up. it hesitates and backfires and chugs bad. i think its my 02sensor but im not sure. im pretty sure my oil pressure gauge is bad too its pegged all the way to the right once its started. any input would be great
#2
CF Veteran
Join Date: Mar 2009
Location: Loomis,California
Posts: 8,712
Likes: 0
Received 2 Likes
on
2 Posts
Year: 1987
Model: Cherokee
Engine: 242 inline six
Your oil gadge may not be bad,check the wires first make surethey are tight,change the sending unit out next.The running bad could be a bad map sensor,IAC sensor,or a vacum leak.
#3
CF Veteran
Join Date: Jul 2009
Location: Chico,ca
Posts: 2,158
Likes: 0
Received 10 Likes
on
9 Posts
Year: 89
Model: Cherokee
Engine: 4.0
I have had some of the same issues before,it can be a worn cap and rotor,it could also be bad compression.
When I have had problems like this the first thing I do is a compression check,even if I am pretty sure it is ok. Reason is as long as it is not mechanical,it is easy to find by testing the other things it can be.
My oil pressure is pegged to the right now,like the previous post said check your wire going to it,I know thw wire is my problem because I bumped it today putting in a new starter relay,just have not repaired it yet,I also have a mechanical guage.
When I have had problems like this the first thing I do is a compression check,even if I am pretty sure it is ok. Reason is as long as it is not mechanical,it is easy to find by testing the other things it can be.
My oil pressure is pegged to the right now,like the previous post said check your wire going to it,I know thw wire is my problem because I bumped it today putting in a new starter relay,just have not repaired it yet,I also have a mechanical guage.
#4
Member
Thread Starter
Join Date: Aug 2009
Location: Virginia
Posts: 231
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2000
Model: Cherokee
Engine: 4.0l
i replace the oil pressure sending unit today and now my gauge works. and i swaped my 02 also but didnt really have a change in its bogging down. imma try and find a juk ard and swap to 5.0 injectors and see if thats my problem. i think for some reason its not getting feul. im thinking i might have clogged inectors but idk.
Thread
Thread Starter
Forum
Replies
Last Post
beabout
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
14
07-06-2018 11:10 AM
shelby5041
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
39
11-07-2015 01:22 AM
Mmll52
Modified XJ Cherokee Tech
6
09-02-2015 10:01 AM
TNXJsleeper
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
1
09-02-2015 05:31 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)