5.3ls random misfire and lean condition
Thread Starter
Registered User
Joined: Oct 2023
Posts: 1
Likes: 0
5.3ls random misfire and lean condition I have a 2003 silverado with a bad misfire it starts and idles fine for about 10-15 seconds then idles rough and misfires horribly through all rpm’s and when I rev the engine and let off it goes down to 200rpm then back to 500-600 rpm’s or just dies.
Coils all seem to have good consistent spark.
things I have replaced:
throttle body
spark plugs
Spark plug wires
air filter
MAF sensor
apps sensor
ill Be replacing the fuel pump and filter in a few day but I would like a second opinion before I spend 100’s chasing the problem?
Coils all seem to have good consistent spark.
things I have replaced:
throttle body
spark plugs
Spark plug wires
air filter
MAF sensor
apps sensor
ill Be replacing the fuel pump and filter in a few day but I would like a second opinion before I spend 100’s chasing the problem?
