i have a 2003 s10 code shows misfire on number 4 cylinder it wont fire at all

Asked by Aug 20, 2015 at 09:20 AM about the 2003 Chevrolet S-10 2 Dr LS Standard Cab LB

Question type: Maintenance & Repair

code shows po304 cylinder misfire new plugs wire are good cylinder pressure is good fuel injectors show good but there is no fire at number four.

2 Answers

61,135

Remove the spark plug on #4. What does it look like? If you have spark, fuel, and compression it has to be firing. Unless the spark plug is fouled. HTH. -Jim

40,455

Swap #4 plug with another cylinder to see if miss moves.

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