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Jeep won't start. Please help!

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Old 01-12-2012, 10:22 PM
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Default Jeep won't start. Please help!

Got a 92 4.0 high output with perfect spark coming from the plug and got tons of fuel pressure. Won't even run on starting fluid.. I was thinking mb crank sensor? But if crank sensor was bad I'd have no spark at all? Any suggestions b4 I light my jeep on fire?
Old 01-12-2012, 10:24 PM
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Originally Posted by xjjustin73
Got a 92 4.0 high output with perfect spark coming from the plug and got tons of fuel pressure. Won't even run on starting fluid.. I was thinking mb crank sensor? But if crank sensor was bad I'd have no spark at all? Any suggestions b4 I light my jeep on fire?
Does it crank at all
Old 01-12-2012, 10:27 PM
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Yup it cranks over. It's my daily drive. This is the first time it's acted up
Old 01-12-2012, 10:29 PM
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Alright so she cranks but doesn't turn over. If I'm not mistaken the CPS wouldn't Ben crank
Old 01-12-2012, 10:33 PM
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I'm prett sure it's not the crank sensor. It's got spark. But won't even fire on starting fluid. I don't get it.
Old 01-12-2012, 10:36 PM
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When was your last tune up? And jut curious what's the fuels pressure at crank
Old 01-12-2012, 10:38 PM
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Originally Posted by sycoglitch
When was your last tune up? And jut curious what's the fuels pressure at crank
It's got newer plugs and wires. Has good pressure when cranking.
Old 01-12-2012, 10:47 PM
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Originally Posted by xjjustin73

It's got newer plugs and wires. Has good pressure when cranking.
But what is the pressure. Should be around 50 before cranking. Forgot what it lowers to as you start it
Old 01-12-2012, 10:54 PM
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It's got perfect pressure. And spark it just dnt wanna fire
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