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Fuel Injector O-Ring.

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I was getting an intermittent start condition on my 1988 MJ. I had checked most of the wiring, and all of that looks good. I was going through checking my fuel injectors to make sure none of them are clogged when one of the yellow O-Rings decided to jump in to the fuel injector port. Do I need to Remove the Cylinder head to get this out or is there an easier way? 

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This happened to me once. Got it out using a muti-strand flexible 18 gauge wire with a small blob of grease on the end. Dabbed it around inside, caught the o-ring, and fished it out through the port hole using a curved dental pick. Was lucky I guess...........

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