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will not fire

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Old Oct 13, 2010 | 05:36 PM
  #1  
gulfman5's Avatar
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From: nicholls ga
Year: 93
Model: Cherokee
Engine: 4.0
Default will not fire

Please help my 93 cher crank rite up and drove me home no problem. Went to crank and will not start no fire have checked fuel 2. Unplugged and repluged cps and herd injectors spray still no crank also bout new distributor no fire still thanks
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Old Oct 13, 2010 | 06:47 PM
  #2  
tiwvr1's Avatar
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From: Elizabethtown, pa
Year: 1994
Model: Cherokee
Engine: 5.2
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replace the cps, unplugging it and plugging it back in won't help anything, unless its a bad connection.
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Old Oct 13, 2010 | 10:46 PM
  #3  
gulfman5's Avatar
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From: nicholls ga
Year: 93
Model: Cherokee
Engine: 4.0
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Thanks does it matter that the injectors came on when I plugged it up?can it be defective and still do this!
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Old Oct 14, 2010 | 01:55 AM
  #4  
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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take off dist cap and rotor is the module connector corroded
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Old Oct 14, 2010 | 05:07 PM
  #5  
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Model: Cherokee
Default no fire

ok i had a similar situation. i replaced the cps and still no fire. follow the center dist wire back to the eletical madual. that wire will be plugged into the coil on top. remove that part. to do so disconect the battery, then the wire going to the dist. next you will see 2 connections toward the engine side on the bottom. disconect those. there are 2 bolts holding that in place remove them as well. take it to part store and they can check that part to see if it is good or bad. it is around 120 dollars for a new lifetime at autozone. the coil on top if that is needed is right at 50 dollars. if the modual is bad replace it and try with the old coil b4 replacing it as well. good luck if that tests good then find the smallest person to get the cps off of the top of the bell housing. 2 11 mm bolts. get alot of extensione and a swivle you will need them. hope this works for you......
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Old Oct 14, 2010 | 05:10 PM
  #6  
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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flash light and 3 foot extension take it right off from under the truck
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Old Oct 14, 2010 | 06:52 PM
  #7  
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From: Elizabethtown, pa
Year: 1994
Model: Cherokee
Engine: 5.2
Default

And yes, I believe the injectors will still work when the cps goes bad, only controls spark. But Everyone else posted good options to. I mainly say just replace the cps first cause it is such a common problem on jeeps. If you search cps testing and have a ohm meter you can test it to, if it test bad then its bad, if it test good, then, well, it still might be bad lol.
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