Cuts Out, Misses. GMC Truck TopKick C-Series (Conventional) C6/C7/C8 2006

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2006 🢒 TopKick C-Series (Conventional) C6/C7/C8 🢒 Engine 🢒 Engine Controls - 7.8L 🢒 Cuts Out, Misses

Checks

Action

DEFINITION: A constant jerking that follows the engine speed, usually more pronounced as the engine load increases which is not normally felt above 1,500 RPM or 48 km/h (30 mph). The exhaust has a steady spitting sound at idle, low speed, or hard acceleration for the fuel starvation that can cause the engine to cut-out.

Preliminary Check

Refer to Symptoms - Engine Controls .

Engine Mechanical Checks

•	Perform a cylinder compression check. Proper compression is 2157 kPa (313 psi).

•	Inspect the engine for the following:

-	Improper valve timing

-	Bent pushrods

-	Worn rocker arms

-	Worn camshaft lobes

-	Broken or weak valve springs.

•	Inspect the intake and exhaust manifold passages for casting flash.

Fuel System Checks

•	Inspect the fuel system for a plugged fuel filter, a fuel system restriction, air in the fuel system, etc.

•	Inspect for water contamination in the fuel. Refer to Contamination Testing .

•	Inspect the fuel injectors for proper operation.