5.7l Vortec. 200k miles. New fuel injectors. Will changing CMP sensor solve this problem?...perhaps? Getting terrible mileage for 4wd XLT Yukon. Any suggestions on getting better out of this engine?
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1999 GMC Yukon Question: Engine "lopes" or lurches at idle and at 40mph
Answer #1Valleyautotech January 12, 2010, 14:04Master
How about a tune up ( distributor cap and rotor spark plug wires and spark plugs )
ReplyReagan, January 12, 2010, 23:59Rookie
Just did full tune up. New wires plus distb & rotor get code P1345 so pretty sure it is sensor...trying to see what the field thinks. TY