Need help fast
#1
CF Veteran
Thread Starter
Join Date: May 2008
Location: Virginia
Posts: 2,680
Likes: 0
Received 1 Like
on
1 Post
Year: 1993
Model: Cherokee
Engine: 4.0L
Need help fast
I am in need of help please, My heep start bucking on me the other day. It back fired once or twice and wouldnt hardly pull a hill. I hae replaced the cps, plugs, cap and button aint that old. I also noticed she ran alittle warmer on the way home after she did that.
#4
CF Veteran
Join Date: Nov 2008
Location: Oak Harbor, WA.
Posts: 6,989
Likes: 0
Received 4 Likes
on
4 Posts
Year: 1987
Model: Cherokee
Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
Finney, do the fuel pump pressure test. Sounds like a bad fuel pump to me. My son's XJ did the same thing when his fuel pump died. Started bucking like a bronco while pulling a hill then died on him.
Trending Topics
#9
CF Veteran
#10
CF Veteran
Thread Starter
Join Date: May 2008
Location: Virginia
Posts: 2,680
Likes: 0
Received 1 Like
on
1 Post
Year: 1993
Model: Cherokee
Engine: 4.0L
It has ran fine for the past month with a gutted cat(Dont want to he it about the cat guys I KNOW) and muffler. So I dont think it is that. What would the timing do if it started to go?
#11
Member
Join Date: Jan 2009
Posts: 189
Likes: 0
Received 1 Like
on
1 Post
Year: 1992
Model: Cherokee
Engine: 4.0 HO
have you checked your injectors? they could be clogged. i dont think that the cat would do that becuase i'm running a straight pipe from my downpipe to my muffler (the one that just got ripped off last weekend down in hot springs) and i've never had that problem.
#12
Newbie
Join Date: Jun 2009
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1995
Model: Cherokee
Engine: 5.2
remember guys there was a system we would use when I was in the uscg call the Kiss method,( Keep it simple stupid) go with your plugs wire rotor cap, Make sure when you replaced your cap an rotor that its set right. Also make sure your plugs are set at the proper gap. (most auto centers say their pre grapd only to find out they were off) With your jeep back fireing this could be the reason for being off timeing or possibly jumped the timeing on your jeep. Also make sure when you replace all your plugs an wire to make sure their in the proper fireing order, again this is call theory cuz none of this jeep in our possesion to make the assment in her, i'm sure you will figure it out good luck to you sire,
"Semper Paratus"
"Semper Paratus"
#13
CF Veteran
Join Date: Nov 2008
Posts: 2,003
Likes: 0
Received 4 Likes
on
3 Posts
Year: 1987
Model: Cherokee
Engine: 4.0
with your high mileage, it is possible that the timing chain let loose a bit and jumped a few teeth.
most likely, though you have either a bad fuel pump (your test at the rail doesn't work. it's wrong and shows no proof or disproof that the pump is bad....you must use a fuel pressure test gauge), or a bad 02 sensor.
my buddy's exo'd 95 xj did the exact same thing when he cracked his o2 sensor
most likely, though you have either a bad fuel pump (your test at the rail doesn't work. it's wrong and shows no proof or disproof that the pump is bad....you must use a fuel pressure test gauge), or a bad 02 sensor.
my buddy's exo'd 95 xj did the exact same thing when he cracked his o2 sensor
#14
CF Veteran
Thread Starter
Join Date: May 2008
Location: Virginia
Posts: 2,680
Likes: 0
Received 1 Like
on
1 Post
Year: 1993
Model: Cherokee
Engine: 4.0L
with your high mileage, it is possible that the timing chain let loose a bit and jumped a few teeth.
most likely, though you have either a bad fuel pump (your test at the rail doesn't work. it's wrong and shows no proof or disproof that the pump is bad....you must use a fuel pressure test gauge), or a bad 02 sensor.
my buddy's exo'd 95 xj did the exact same thing when he cracked his o2 sensor
most likely, though you have either a bad fuel pump (your test at the rail doesn't work. it's wrong and shows no proof or disproof that the pump is bad....you must use a fuel pressure test gauge), or a bad 02 sensor.
my buddy's exo'd 95 xj did the exact same thing when he cracked his o2 sensor
The cap is on right cause it has been on for 10,000 miles I just replaced the plugs and set the gap myself 300 mile atlest.