Spark no start
#1
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Year: 1992
Model: Cherokee
Engine: 4.0
Spark no start
Hey all. My xj was running fine then one day it stalled. And hasn't started up sense. I've replaced cps. Coil. Cap and rotor. Plugs. Alt. batt. I have spark and fuel and compression. But won't even attempt to start. Please help
#4
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Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
You should fill in your info so we can see what you have. No crank? Does it click? If it's a auto trans:
If you hold the key over, and jiggle the shifter in park or neutral and it starts, it's your NSS. http://bc4x4.com/tech/2010/jeep-neut...ty-switch-nss/
If you hold the key over, and jiggle the shifter in park or neutral and it starts, it's your NSS. http://bc4x4.com/tech/2010/jeep-neut...ty-switch-nss/
#6
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Year: 1992
Model: Cherokee
Engine: 4.0
Sorry it's a 92 xj 4.0 ho. It's in the shop now been there for a week they don't get it either. They put it on diagnostic and said everything checked fine?!?
#7
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Year: 1990
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#9
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Year: 1990
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Maybe you have spark but not GOOD blue spark?
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Is everyone absolutely, positively sure that the plug wires are on the distributor cap firmly and in the checked-three-times proper position?
Are the wires firmly on the proper spark plug in the checked-three-times proper firing order?
Is there a new rotor installed? For sure?
Are the wires firmly on the proper spark plug in the checked-three-times proper firing order?
Is there a new rotor installed? For sure?
#13
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Year: 1998 Sport
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Engine: 4.0
Like cruiser asked. Do you have a strong BLUE spark? Any other color is not sufficient. Also you said you installed a new CPS. Was is OEM or was it a off brand? Off brands are known to be bad out of the box.
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Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Pressure didn't go from 39 to 49 till 96-97 if I have that right. If that's correct if might be a little high.??
If you have spark, compression and fuel, being flooded is one of the things that will still keep it from firing. You might see if a plug is wet after giving it a go. (X all^, crisp blue spark)
Also, #1 is at 5:00 as viewed from the side, 153624 clockwise.
Make sure the brittle little MAP tube from the inside of your TB, up to the map about center up on the fire-wall is flawless. Off, cracked, or plugged might make it flood.
If you have spark, compression and fuel, being flooded is one of the things that will still keep it from firing. You might see if a plug is wet after giving it a go. (X all^, crisp blue spark)
Also, #1 is at 5:00 as viewed from the side, 153624 clockwise.
Make sure the brittle little MAP tube from the inside of your TB, up to the map about center up on the fire-wall is flawless. Off, cracked, or plugged might make it flood.