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Jeep Wrangler YJ
YJ General Discussion
Engine Stalls When gets to Operating Temperature
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<blockquote data-quote="Photojeeper" data-source="post: 430182" data-attributes="member: 19686"><p>It is a 1990 with the Mopar kit which is an Muiltport EFI. Looking at other threads and other forums, I am ruling out the fuel pump. Since if it was bad it would be cutting out and the Jeep would run out of fuel. If I let it cool it runs fine until OT. So I will be replacing the coolant temp sensor at the tstat housing and the MAP, MAT sensors. If if goes away after that then that was the problem. If it continues I will replace to O2 sensor. Will let you know.</p><p>The vapor lock issues were when I had the external fuel pump and the kit does not come with the heat shields that the other 4.0 OEM engines comes with. Being from SoCal I do a lot of desert trips, even in the Spring and Fall it can get toasty. Then I got a in tank fuel pump but kept all of the insulation on the fuel lines. Never can be too cool. ;-)</p></blockquote><p></p>
[QUOTE="Photojeeper, post: 430182, member: 19686"] It is a 1990 with the Mopar kit which is an Muiltport EFI. Looking at other threads and other forums, I am ruling out the fuel pump. Since if it was bad it would be cutting out and the Jeep would run out of fuel. If I let it cool it runs fine until OT. So I will be replacing the coolant temp sensor at the tstat housing and the MAP, MAT sensors. If if goes away after that then that was the problem. If it continues I will replace to O2 sensor. Will let you know. The vapor lock issues were when I had the external fuel pump and the kit does not come with the heat shields that the other 4.0 OEM engines comes with. Being from SoCal I do a lot of desert trips, even in the Spring and Fall it can get toasty. Then I got a in tank fuel pump but kept all of the insulation on the fuel lines. Never can be too cool. ;-) [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Engine Stalls When gets to Operating Temperature
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