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Jeep Wrangler YJ
YJ General Discussion
91 Jeep YJ - Cranks but No start - Have spark and have fuel at fuel rail
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<blockquote data-quote="Gilaguy23" data-source="post: 434006" data-attributes="member: 19498"><p>In a nut shell there are 2 TDC's. One is the compression stroke and the other between exhaust and intake cycles. if it ran fine until whenever, then suddenly died It is possible the dist rotated a bit if it was not tightened down to begin with,unlikely, but many things are possible. That being said the computer adjusts the timing once the initial is set basically. From my experiences and generally speaking if a engine has its timing off,even 180 degrees off on the distributor, it will crank over, backfire, crank slow like its struggling ect. Ive never seen an engine with the timing off act 100% dead and not try to do something like I mentioned above. FYI, if an engine is at exactly tdc on the compression stroke you can basically drop the distributor in at any position as long as the rotor is pointing at the #1 plug wire/terminal when its seated and snugged up. Yeah you'll have to set the initial as mentioned. I stuck a new dist in my 91 and was a tooth off or probably 20-30 degrees off and it still started after cranking it a bit and was driveable sort of, My SNAFU there. Im sure a few others will chime in with some ideas on whats going on to get you going.</p></blockquote><p></p>
[QUOTE="Gilaguy23, post: 434006, member: 19498"] In a nut shell there are 2 TDC's. One is the compression stroke and the other between exhaust and intake cycles. if it ran fine until whenever, then suddenly died It is possible the dist rotated a bit if it was not tightened down to begin with,unlikely, but many things are possible. That being said the computer adjusts the timing once the initial is set basically. From my experiences and generally speaking if a engine has its timing off,even 180 degrees off on the distributor, it will crank over, backfire, crank slow like its struggling ect. Ive never seen an engine with the timing off act 100% dead and not try to do something like I mentioned above. FYI, if an engine is at exactly tdc on the compression stroke you can basically drop the distributor in at any position as long as the rotor is pointing at the #1 plug wire/terminal when its seated and snugged up. Yeah you'll have to set the initial as mentioned. I stuck a new dist in my 91 and was a tooth off or probably 20-30 degrees off and it still started after cranking it a bit and was driveable sort of, My SNAFU there. Im sure a few others will chime in with some ideas on whats going on to get you going. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
91 Jeep YJ - Cranks but No start - Have spark and have fuel at fuel rail
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