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Re: PLEASE HELP!! 07 L322 4.2L SC sudden engine issues and

would change fuel filter and do an intake service, clean TB (on account of the oil you mentioned as this can cause rough idle). report back. Mine did the exact same thing when the fuel filter fully clogged one night... shuttered and died... restarted it able to limp it home, died in the garage. Would run intermittently for minutes then shaking and stall. Fuel pressure was erratic. When I pulled the fuel filter and banged it against the table an awesome amount of junk poured out of it. Either it reached a critical level or it all at once sucked up a bunch of garbage in the fuel tank. Even if this doesn't turn out to be your issue it's a good place to start... takes about 40 min to replace the filter. With your misfires and lean condition I'd be looking at fuel delivery for sure, pump could be bad also.
 
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