1990 xj long crank time and hard starting
Thread Starter
Member
Joined: Oct 2011
Posts: 112
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From: California
Year: 1990
Model: Cherokee
Engine: 4.0
Thread Starter
Member
Joined: Oct 2011
Posts: 112
Likes: 0
From: California
Year: 1990
Model: Cherokee
Engine: 4.0
also was wondering if back pressure could have anything to do with it? 
considering i had the CAT sliced out because it was thrashed and replaced with a straight pipe because of lack of funds.
considering i had the CAT sliced out because it was thrashed and replaced with a straight pipe because of lack of funds.
Thread Starter
Member
Joined: Oct 2011
Posts: 112
Likes: 0
From: California
Year: 1990
Model: Cherokee
Engine: 4.0
not yet the jeep is my daily driver and ive been having to borrow cars and catch rides but i was getting ready to check and see what kind of battery my meter has in it
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
These are about $5 at harbor freight. I use it to check amps from my solar or hydro power. To check the house or car voltage. (house now 12.25). At work for 110 or 220 V AC. (or the generators here). Or to check flashlight or button batteries. Or to check millavolts of thermocouples for gas appliances. Or resistance, like checking a coil. Or....or....or......Trying the test Cruiser (and others?) suggested for the CPS.(.5 volts AC). Not that yours shouldn't be fine, just that at this point it would be nice to put that one to bed, for GOOD!
Thread Starter
Member
Joined: Oct 2011
Posts: 112
Likes: 0
From: California
Year: 1990
Model: Cherokee
Engine: 4.0
These are about $5 at harbor freight. I use it to check amps from my solar or hydro power. To check the house or car voltage. (house now 12.25). At work for 110 or 220 V AC. (or the generators here). Or to check flashlight or button batteries. Or to check millavolts of thermocouples for gas appliances. Or resistance, like checking a coil. Or....or....or......Trying the test Cruiser (and others?) suggested for the CPS.(.5 volts AC). Not that yours shouldn't be fine, just that at this point it would be nice to put that one to bed, for GOOD!
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
http://www.harborfreight.com/7-funct...ter-90899.html
.................V.....Yea, I bought a "Better" $25 tester from HD. I managed to kill that and the cheap HF ones are still trucking on. (mostly), Go figure!...V
.................V.....Yea, I bought a "Better" $25 tester from HD. I managed to kill that and the cheap HF ones are still trucking on. (mostly), Go figure!...V
Last edited by DFlintstone; Oct 18, 2011 at 12:49 PM.
MJ>XJ
Joined: Mar 2009
Posts: 17,836
Likes: 7
From: Griffin, G.A.
Year: 1990
Model: Comanche
Engine: 4.0 I6
Doubt it but make sure your getting air back in in the fuel tank... bad gas cap... Distributor can also be tested but i think i read that was new as well... Computer... Should be able to find one easily in classifieds...
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,579
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I've never heard that about ECU bolts. But you made me think of this.
A friend of mine, and an excellent tech, did this to fix an intermittent problem on his 88. He removed the ECU., unplugged it, sprayed the connectors on the ECU and on the Harness with a good electrical contact cleaner. Before putting it back together, he used a small pick to tighten up the female connectors that grab the pins. Never had the problem again.
That now reminds me of something I like to do on any newly acquired Jeep. I take about 20 minutes and go through the engine bay unplugging connectors and relays, inspecting the terminals, spraying out the connections with a good elictrical contact cleaner, applying a bit of dielectric grease, and putting them back together. Everyone you can find!!
Did you ever remove your coil from the ICU and clean and bend the spring contacts between the two?
A friend of mine, and an excellent tech, did this to fix an intermittent problem on his 88. He removed the ECU., unplugged it, sprayed the connectors on the ECU and on the Harness with a good electrical contact cleaner. Before putting it back together, he used a small pick to tighten up the female connectors that grab the pins. Never had the problem again.
That now reminds me of something I like to do on any newly acquired Jeep. I take about 20 minutes and go through the engine bay unplugging connectors and relays, inspecting the terminals, spraying out the connections with a good elictrical contact cleaner, applying a bit of dielectric grease, and putting them back together. Everyone you can find!!
Did you ever remove your coil from the ICU and clean and bend the spring contacts between the two?
CF Veteran
Joined: Jun 2011
Posts: 2,858
Likes: 1
From: Nor-Cal
Year: 1990
Model: Cherokee
Engine: The venerable 4.0
Originally Posted by huntingman2706217
Doubt it but make sure your getting air back in in the fuel tank... bad gas cap... Distributor can also be tested but i think i read that was new as well... Computer... Should be able to find one easily in classifieds...
Thread Starter
Member
Joined: Oct 2011
Posts: 112
Likes: 0
From: California
Year: 1990
Model: Cherokee
Engine: 4.0
im really hoping its not the computer. On a side note took my meter apart and the fuse was blown. Anyways has anybody heard about possibly wallowing out the holes on the cps so it sits closer to the flywheel?