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Crank/no start when hot

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2 years 7 months ago #51748 by bobbyc9055
Crank/no start when hot was created by bobbyc9055
Starts no problem when cold, and runs great for hours. Shut off and try to start, cranks but no start. has fuel pressure, spray starting fuel in intake, nothing. has no spark off of coil! Hope you can help. didn't what to go and buy a PCM yet!   

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2 years 7 months ago #51751 by bobbyc9055
Replied by bobbyc9055 on topic Crank/no start when hot
5.0 1998 Jeep Grand Cherokee, pressure will cranking.

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2 years 7 months ago #51752 by Andy.MacFadyen
Replied by Andy.MacFadyen on topic Crank/no start when hot
Istr these need both cam & crank position signals to start but once running use only the crank so cam sensor droppinh out due to hear soak where to start looking.
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)

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2 years 7 months ago #51757 by Cheryl
Replied by Cheryl on topic Crank/no start when hot
When did they make a 5.0 liter keep? I know the 4.0 3.7 4.7 and the 318

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2 years 7 months ago #51758 by bobbyc9055
Replied by bobbyc9055 on topic Crank/no start when hot
This looks like the issue, Thanks. Would it have no spark if the cam sensor was faulty?

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2 years 7 months ago #51760 by bobbyc9055
Replied by bobbyc9055 on topic Crank/no start when hot
I will let you know. Thanks

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2 years 6 months ago #51932 by bobbyc9055
Replied by bobbyc9055 on topic Crank/no start when hot
last few days have been cool in northern IL, so jeep has been running fine. Finally stopped starting again to test cam sensor. This is what I got:
-5v at supply w/ignition on
-5v at signal w/ignition on
-have 12v at ground when ground to + on battery
-have continuity on ground w/ignition on
-no continuity on ground w/ignition off

This is a cam sensor located in the distributor.
I'm bad, it is a 5.2 liter :)

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2 years 6 months ago #51945 by bobbyc9055
Replied by bobbyc9055 on topic Crank/no start when hot

Starts no problem when cold, and runs great for hours. Shut off and try to start, cranks but no start. has fuel pressure, spray starting fuel in intake, nothing. has no spark off of coil! Hope you can help. didn't what to go and buy a PCM yet!   

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2 years 6 months ago #51946 by bobbyc9055
Replied by bobbyc9055 on topic Crank/no start when hot
Don"t know if this went through earlier, didn't see it in the Forum.

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