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No start on a 1991 xj

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Old Feb 29, 2012 | 05:13 PM
  #1  
txredneck's Avatar
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From: arlington, tx
Year: 1990
Model: Cherokee
Engine: 4.0
Default No start on a 1991 xj

Ok so here is what I got the fuel rail is getting gas but the injectors are not getting power or spitting fuel .... checked fusses and relays ... ????? What could it be .... o and its getting spark to the plugs
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Old Feb 29, 2012 | 05:18 PM
  #2  
tjwalker's Avatar
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From: In the middle of Minnesota!
Year: 1999
Model: Cherokee
Engine: 4.0
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So you've actually pulled a plug and grounded it and cranked the engine and verified spark? Is it a strong, BLUE, snapping spark? Yellow/orange/white indicates a weak spark which may not be strong enough to start the engine; I've answered two threads this week where weak spark was the culprit and the ignition coil was the cause.

How do you know the injectors are not getting a pulse? Did you use a noid light?
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Old Feb 29, 2012 | 05:53 PM
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txredneck's Avatar
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From: arlington, tx
Year: 1990
Model: Cherokee
Engine: 4.0
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Plugs are getting good spark and we used a test light to check the injectors
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