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Jeep Wrangler YJ
YJ General Discussion
Oil In The Fuel Tank
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<blockquote data-quote="RangerRick" data-source="post: 429210" data-attributes="member: 19360"><p>I would have said a bad diaphragm in the fuel pump but this is a 1993 which is multi injector EFI so there's no block mounted fuel pump (like carbs used back in the day) that could have ruptured the diaphragm and caused oil to exchange with the fuel. Usually when that happened people noticed a gas smell of the engine oil in the motor and the oil was diluted or thinned out. Only YJ's that could possibly even have this problem are 4.2L 6-cylinder 1987-1990 models prior to EFI introduction. All 4-bangers had at least fuel injection from the start in 1987.</p><p></p><p>Can't be that problem so.... Dunno!</p><p></p><p>Makes sense that old gas could have turned to sludge but that's a lot of sludge. Never had even the longest stored vehicle not run in nearly 20 years do that and make so much sludge back into the tank but I suppose it could happen. Happens to plastic and rubber parts that start to degrade and turn back into gooey sticky sludge like components over time.</p><p></p><p>Hope you got it all straightened out [USER=19471]@Fantabox[/USER] !</p><p></p><p>RR</p></blockquote><p></p>
[QUOTE="RangerRick, post: 429210, member: 19360"] I would have said a bad diaphragm in the fuel pump but this is a 1993 which is multi injector EFI so there's no block mounted fuel pump (like carbs used back in the day) that could have ruptured the diaphragm and caused oil to exchange with the fuel. Usually when that happened people noticed a gas smell of the engine oil in the motor and the oil was diluted or thinned out. Only YJ's that could possibly even have this problem are 4.2L 6-cylinder 1987-1990 models prior to EFI introduction. All 4-bangers had at least fuel injection from the start in 1987. Can't be that problem so.... Dunno! Makes sense that old gas could have turned to sludge but that's a lot of sludge. Never had even the longest stored vehicle not run in nearly 20 years do that and make so much sludge back into the tank but I suppose it could happen. Happens to plastic and rubber parts that start to degrade and turn back into gooey sticky sludge like components over time. Hope you got it all straightened out [USER=19471]@Fantabox[/USER] ! RR [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Oil In The Fuel Tank
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