Quote:
Originally Posted by lahomer
the truck has 130,000 miles on it sometimes it rides good then all of sudden start missing and spark knocking.
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Clear code and retest.
If that code or any other code comes back repair for that code.
Confirm good fuel pressure.
Confirm and make sure you have good ac delco plugs and cap and rotor and check plug wires and good hot blue spark from coil.
Check dist shaft for side play.
If engine is missing you should be getting a code for that cylinder missing.