kathy ... 9/10/2011

2001 GMC Savana 2500 Base 8Cyl5.0L - Engine

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a mild miss at high way speed and check engin light is on.

i did a tune up end changed the distripitor, cam sensor, crank senor.

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  Jimm 9/10/2011

  First step; have the 'check engine light' scanned - for free - at any local auto parts store, such as; Advance Auto, Auto Zone, NAPA. Then, reply with the specific fault code for further assistance. Too many possibilities for the highway miss at speed - better to have the fault code to help pinpoint at exact potential area to begin the diagnosis.

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  kathy woodring 9/10/2011

  thank you jim i will get get back with the fault code.
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  kathy woodring 9/10/2011

  jim i've got the fault code p1345.

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  Jimm 9/10/2011

  Code P1345 is for a camshaft to crankshaft correlation wrong. Code P1345 determines if the distributor is installed incorrectly, or if a mechanical malfunction is present in the engine. The light will trigger when the engine is running and the camshaft sensor reference pulse is not detected at a correct relative position with the crankshaft pulse. Most likely causes for this Chevy check engine light code include a faulty crankshaft position sensor, a wiring concern or an improperly installed distributor. A quick check on the crankshaft sensor is to monitor the RPM value with a scan tool while revving up the engine. If the reading is close to twice the expected RPM, then the sensor is likely faulty. There are other less likley concerns possible, such as base engine or computer related issues, but these involve more in depth testing.

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