99 s10 4.3 misses idleing or giving gas put wires plugs rotor and dist cap and still shows varying codes like #5 then#2,#7 unplugged mass sensor disnt make any difference same on egr valve whats next?

Asked by Dec 01, 2017 at 02:27 PM about the 1999 Chevrolet S-10

Question type: Maintenance & Repair

truck still misses

2 Answers

Does the exaust smell really rich? Like fuel

No, it does have a little backfiring in the carb but just a spit or two and it feels like its only hitting on 4 or 5 cyls. Shut it off one night next morning would only turn over no starting after putting the items in it, it will start and run but just misses out.Before I tuned it it backfired real bad and wouldn't start

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