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Jeep Wrangler YJ
YJ General Discussion
1992 2.5 YJ seems to have fuel issues
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<blockquote data-quote="Flyer58" data-source="post: 428722" data-attributes="member: 18629"><p>I also have a '92 YJ with the 2.4L and 5 speed and have rebuilt the engine and currently have the fuel tank out to fix a sending unit issue.</p><p></p><p>Lots of questions. Does your gas gauge work? Have you figured out what you MPG's are? How many miles on the 6 or 7 gallons of gas? 15 MPG or so is normal depending on the driving it could be a little higher or much lower if you go off road. Do you smell gas fumes which may indicate a steady leak? </p><p></p><p>It could be a fuel filter problem or the screen on the fuel pump inlet. Could be a venting problem. Could be a leak on the fuel supply or return lines between the tank and the engine. Could be a fuel pressure controller problem or a pump problem.</p><p></p><p>I'd start with checking the fuel pressure at the test port on the injector rail. You can probably borrow a fuel test gauge at a local auto parts store and is pretty simple. When safe and after idling for several minutes crawl under and looks for any gas drips or leaks You can also test the fuel flow from the pump but be careful. It involves a length of hose going from the engine fuel supply line to an empty gas can and then there's a way to use a jumper wire at the relay to get the pump to run. This can be done safely or cause problems for you and a the local fire department if your not careful. </p><p></p><p>Your gas tank from the factory is probably limited to 15 gallons BUT it's actually a 20 gallon tank with a long internal vent tube which kicks off the gas pump handle early leaving 5 gallons of air in it. There was a 20 gallon option and the only difference was a shorter vent tube. Go figure, pay more and get a shorter tube. </p><p></p><p>Lots of common knowledge here to help but need a few more answers first. You'll find the Factory Service Manuals in the Y Resources section of this forum.</p><p></p><p>Let us know.</p></blockquote><p></p>
[QUOTE="Flyer58, post: 428722, member: 18629"] I also have a '92 YJ with the 2.4L and 5 speed and have rebuilt the engine and currently have the fuel tank out to fix a sending unit issue. Lots of questions. Does your gas gauge work? Have you figured out what you MPG's are? How many miles on the 6 or 7 gallons of gas? 15 MPG or so is normal depending on the driving it could be a little higher or much lower if you go off road. Do you smell gas fumes which may indicate a steady leak? It could be a fuel filter problem or the screen on the fuel pump inlet. Could be a venting problem. Could be a leak on the fuel supply or return lines between the tank and the engine. Could be a fuel pressure controller problem or a pump problem. I'd start with checking the fuel pressure at the test port on the injector rail. You can probably borrow a fuel test gauge at a local auto parts store and is pretty simple. When safe and after idling for several minutes crawl under and looks for any gas drips or leaks You can also test the fuel flow from the pump but be careful. It involves a length of hose going from the engine fuel supply line to an empty gas can and then there's a way to use a jumper wire at the relay to get the pump to run. This can be done safely or cause problems for you and a the local fire department if your not careful. Your gas tank from the factory is probably limited to 15 gallons BUT it's actually a 20 gallon tank with a long internal vent tube which kicks off the gas pump handle early leaving 5 gallons of air in it. There was a 20 gallon option and the only difference was a shorter vent tube. Go figure, pay more and get a shorter tube. Lots of common knowledge here to help but need a few more answers first. You'll find the Factory Service Manuals in the Y Resources section of this forum. Let us know. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
1992 2.5 YJ seems to have fuel issues
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