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U have a vapor lock situation.. Once engine is warm it's building back pressure in tank. Replace vent hose located on tank next to filler hose. Very common on jeeps?
Wiki User
∙ 18y ago
You need to do a little investigating. Run it for a while to get the engine warmed up, then shut it off somewhere that you have some test equipment and help available. Make sure it won't start, then spray a little starting fluid into the air intake while a helpe tries to start the engine. If it starts briefly you know that there is a problem with fuel delivery and you can start checking out the filter, fuel pump, relays and electrical circuits that feed the fuel pump. Remember that even NEW fuel pumps can have a problem so don't rule out that one. If it WON'T start with the help of starting fluid, pull a sparkplug wire and connect it to a spare sparkplug. Set the spare sparkplug with the wire attached on a metal part of the engine and have your helper try to start it again. If you don't have a nice, strong spark, you know there is a problem in the ignition somewhere. If there isn't a spark, check the coil input. Connect one end of a volt meter to ground and the other end to the coil input. One side of the coil input should have constant voltage, the other side should be intermittent while the engine is cranked by your helper. If you're getting voltage TO the coil and intermittent voltage on the other side, but no spark, you probably have a bad coil that fails when it gets hot.
Wiki User
∙ 18y ago
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