Cuts Out, Misses
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Cuts Out, Misses
| Inspection |
Action |
| DEFINITION: A constant jerking that follows the engine speed, usually more pronounced as the engine load increases which is not normally felt above 1500 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 Inspection |
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| Sensor Inspection |
- Observe the fuel rail pressure (FRP) sensor and the fuel pressure regulator commanded percent at idle. FRP should be near 40 MPa, and commanded percent should be near 40 percent. If the command is high, a fuel pressure or sensor exists.
- Inspect for an intermittent CKP sensor signal. Refer to Intermittent Conditions .
- Inspect the crankshaft position (CKP) sensor reluctor wheel. Remove the CKP sensor and attempt to move the reluctor wheel front to back or side to side with a probe. If there is any movement the reluctor wheel retaining bolts are loose.
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| Engine Mechanical Inspection |
- Perform the Engine Compression Test. Refer to Engine Compression Test
in Engine Mechanical.
- Inspect the engine for the following conditions:
- Improper valve timing
- Bent pushrods
- Worn rocker arms
- Worn camshaft lobes
- Broken or weak valve springs, refer to Symptoms - Engine Mechanical
in Engine Mechanical.
- Inspect the intake and exhaust manifold passages for casting flash.
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| Fuel System Inspection |
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