Misfires

Tiny
ANTIONE HARMON
  • MEMBER
  • 2007 CHEVROLET AVALANCHE
  • 5.3L
  • V8
  • 4WD
  • 120,000 MILES
#7 misfires I changed the coil pack. What is next?
Sunday, May 29th, 2016 AT 8:22 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Cheapest way is to have a professional scan for codes and freeze frame it so he can check voltages to sensors. then do basic stuff otherwise you spend a fortune in parts playing guessing game. also check for low fuel pressure and vacuum leaks auto parts rent gauge for fuel.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Sunday, May 29th, 2016 AT 8:25 AM

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