89 4.0L overheat-timing issue
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Newbie
Joined: Oct 2011
Posts: 1
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From: CA
Year: 89
Model: Cherokee
Engine: 4.0L 6 cyl.
89 4.0L overheat-timing issue
I have intermittent timing issue...engine overheats, new radiator,water
pump, all gaskets, hoses, dist. cap and rotor, no leaks. What controls the timing, that sensor thing underneath the distributor? Works good when it wants to. How do I clear my computer also, I've heard of 3 days reset, is this right? Is there a quick way to jump
something on the test socket to reset computer? Thanks for thoughts.
pump, all gaskets, hoses, dist. cap and rotor, no leaks. What controls the timing, that sensor thing underneath the distributor? Works good when it wants to. How do I clear my computer also, I've heard of 3 days reset, is this right? Is there a quick way to jump
something on the test socket to reset computer? Thanks for thoughts.
Last edited by alien; Oct 20, 2011 at 01:22 PM. Reason: insufficient information
CF Veteran
Joined: Apr 2011
Posts: 1,173
Likes: 3
From: Maine
Year: 1999
Model: Cherokee
Engine: 4.0 inline 6
my dads computer diagnostic thing has a "clear all codes" option. somewhere you can do it just have to search for it. as far as timing goes i cannot be much help with that.
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Hi, Welcome! You have what they call the Renix system. The timing is controlled by the ECU. (It's version of a computer). You can't change it. I guess that business in the dizy has to do with the injectors. Am told that there is no point in resetting those because they don't store anything.
Your overheating is almost certainly the cooling system. Rad, thermostat fan, fan clutch, electric fan, belt, shroud, ...stuff like that. If you post how/when it over heats and what has been replaced somebody here can help. Good luck! D.
Your overheating is almost certainly the cooling system. Rad, thermostat fan, fan clutch, electric fan, belt, shroud, ...stuff like that. If you post how/when it over heats and what has been replaced somebody here can help. Good luck! D.
Seasoned Member
Joined: Jul 2011
Posts: 327
Likes: 0
From: WA
Year: 1988
Model: Cherokee
Engine: 4.0
Originally Posted by DFlintstone
Hi, Welcome! You have what they call the Renix system. The timing is controlled by the ECU. (It's version of a computer). You can't change it. I guess that business in the dizy has to do with the injectors. Am told that there is no point in resetting those because they don't store anything.
Your overheating is almost certainly the cooling system. Rad, thermostat fan, fan clutch, electric fan, belt, shroud, ...stuff like that. If you post how/when it over heats and what has been replaced somebody here can help. Good luck! D.
Your overheating is almost certainly the cooling system. Rad, thermostat fan, fan clutch, electric fan, belt, shroud, ...stuff like that. If you post how/when it over heats and what has been replaced somebody here can help. Good luck! D.
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
I have intermittent timing issue...engine overheats, new radiator,water
pump, all gaskets. What controls the timing, that sensor thing underneath the disiributor? Works good when it wants to. How do I clear my computer
also, I've heard of 3 days reset, is this right? Is there a quick way to jump
something on the test socket to reset computer? Thanks for thoughts.
pump, all gaskets. What controls the timing, that sensor thing underneath the disiributor? Works good when it wants to. How do I clear my computer
also, I've heard of 3 days reset, is this right? Is there a quick way to jump
something on the test socket to reset computer? Thanks for thoughts.
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