1994 Jeep Grand Cherokee issue
03-19-2013, 07:56 PM
#16
Newbie
Join Date: Aug 2012
Location: Longmont, CO
Posts: 13
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1995
Model: Grand Cherokee
Engine: 5.2 v8
She can also try the key trick to read codes on the 94.
Without starting the engine, turn the key to on-off-on-off-on and then the CEL will blink. There will be a short pause between the tens and ones places (5 blinks, pause, 5 blinks is 55 which should be the last code) and there will be a long pause between multiple codes.
Without starting the engine, turn the key to on-off-on-off-on and then the CEL will blink. There will be a short pause between the tens and ones places (5 blinks, pause, 5 blinks is 55 which should be the last code) and there will be a long pause between multiple codes.
03-19-2013, 08:18 PM
#17
CF Veteran
Join Date: Apr 2008
Location: Northern Illinois
Posts: 2,237
Likes: 0
Received 3 Likes
on
3 Posts
Year: 90
Model: Cherokee
Engine: 4.0
I also wanted to mention, on the 4.0 the injectors are in the intake manifold, not the head.
I believe her original question was about the IAC or the TPS. Either one could be causing her problem. I'm not up on the OBDI systems enough to know what she's got on her throttle body. Is it port injected or throttle body injected? I also believe the PCM controls the metering of the fuel with inputs from the TPS and the CPS. The ASD relay is there to totally shut down the system if any part of the system goes totally out of limits.
Remote diagnosis is like throwing stones at a jetliner. You have to go step by step. I would start with a pressure guage on the fuel rail.
1-check initial pressure
2-check pressure while running.
3-does it cut off abruptly causing the stall? It should hold pressure for a while after the stall if the fuel system is okay.
I believe her original question was about the IAC or the TPS. Either one could be causing her problem. I'm not up on the OBDI systems enough to know what she's got on her throttle body. Is it port injected or throttle body injected? I also believe the PCM controls the metering of the fuel with inputs from the TPS and the CPS. The ASD relay is there to totally shut down the system if any part of the system goes totally out of limits.
Remote diagnosis is like throwing stones at a jetliner. You have to go step by step. I would start with a pressure guage on the fuel rail.
1-check initial pressure
2-check pressure while running.
3-does it cut off abruptly causing the stall? It should hold pressure for a while after the stall if the fuel system is okay.
The throttle bodies on either engine only have air passing through them. There is a TPS and IAC on both throttle bodies. I will have to check my spare, but for some reason I think the MAP is mounted on throttle body on the 5.2l.
03-19-2013, 11:59 PM
#18
Newbie
Join Date: Aug 2012
Location: Longmont, CO
Posts: 13
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1995
Model: Grand Cherokee
Engine: 5.2 v8
03-22-2013, 01:26 PM
#19
Newbie
Thread Starter
Join Date: Mar 2013
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
Thanks!
Thank you everyone for your information! Even the arguing, lol! It does help so that I understand what my Jeep has or doesn't have. My Dad and I are going to start the process of elimination this weekend! I will defiantly let y'all know what comes of it and if I run into anymore problems, I'll be posting!
Thanks again!
Thanks again!
03-23-2013, 04:12 PM
#20
Old fart with a wrench
Thank you, County girl. That's what we're here for, to give our opinions, right or wrong, and to help you make decisions. Sometimes it's something you haven't thought about that solves the problem. When you post your results, it helps others.
Thread
Thread Starter
Forum
Replies
Last Post
Tompop
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
16
08-25-2015 03:35 PM
Buddylove1991
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
2
08-20-2015 08:28 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)