Jeep will not start
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
From our pms sounds like a wiring issue. You got know one that can turn key while you move wiring ?
Thread Starter
Junior Member
Joined: Jan 2014
Posts: 67
Likes: 0
Year: 1987
Model: Cherokee
Engine: 4.0L Inline 6cyl
Also something about a ceramic fuel thing?
Thread Starter
Junior Member
Joined: Jan 2014
Posts: 67
Likes: 0
Year: 1987
Model: Cherokee
Engine: 4.0L Inline 6cyl
Thread Starter
Junior Member
Joined: Jan 2014
Posts: 67
Likes: 0
Year: 1987
Model: Cherokee
Engine: 4.0L Inline 6cyl
I just checked all the fuses under the dash just for some reason and nothing's wrong down there. There is a spot that say "IGN" that is open but that's all except for a fried radio fuse
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Very rarely do ecms go bad on renix , theres a white ceramic thing on drivers fender well that drops voltage to pump to quiet it down will not affect spark though . Theres one other thing poassible could be check theresx4 relays by you passenger fender well. Could be having a issue with thexasd relay you coud try switch the ac relay in it spot,
Thread Starter
Junior Member
Joined: Jan 2014
Posts: 67
Likes: 0
Year: 1987
Model: Cherokee
Engine: 4.0L Inline 6cyl
Very rarely do ecms go bad on renix , theres a white ceramic thing on drivers fender well that drops voltage to pump to quiet it down will not affect spark though . Theres one other thing poassible could be check theresx4 relays by you passenger fender well. Could be having a issue with thexasd relay you coud try switch the ac relay in it spot,
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
That's just to tap into for power when keys in run position. Fuses may look god bbut to really check them you need to confirm power in and out when keys in run position.
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
CF Veteran
Joined: Feb 2013
Posts: 1,267
Likes: 1
From: Franksville, Wi
Year: 1995
Model: Cherokee
Engine: 4.0
I wonder if your flex plate got damaged.
It would have busted your old CPS and also your new CPS. Just for grins, you should pull your new CPS and verify that it isn't cracked or damaged. If it is still good then we can at least rule out anything down there.
It would have busted your old CPS and also your new CPS. Just for grins, you should pull your new CPS and verify that it isn't cracked or damaged. If it is still good then we can at least rule out anything down there.
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Thread Starter
Junior Member
Joined: Jan 2014
Posts: 67
Likes: 0
Year: 1987
Model: Cherokee
Engine: 4.0L Inline 6cyl
I can do that tomorrow. So if the flex plate is damaged and (destroyed the first CPS) when the plate is spinning due to damage the new CPS can't read it and therefore no spark?


