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TOPIC : Fuel injectors

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Fuel According to GM

Apparently, General Motors does not endorse, support or acknowledge the need for fuel injector cleaning as a preventive maintenance procedure. According to GM, fuel injector cleaning is approved only when performed as directed by a published GM driveability or DTC diagnostic service procedure.

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Don’t Let the Caddy Fool You

Owners of 2007-2011 Cadillac CTS, SRX or STS models may comment about a check engine light on during or after a crank-no-start event or a hard start/extended crank. A DTC P0336 may be stored.

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Buick Rubbed the Wrong Way

This bulletin applies to 2013 Buick Enclave vehicles. The SES light may be on with misfires and any of the following injector-related codes:

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More Mopar Programming

This bulletin applies to 2014 Dodge Avenger models equipped with a 3.6L engine. According to Chrysler, a “small number” of customers may experience a MIL on, and the technician may find DTC P0204 set (fuel injector 4 circuit/open).

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Locked-Up Bimmer

This bulletin released by BMW addresses the issue of potential engine hydraulic lock caused by a fuel injector that is stuck in the open position, where the engine will mo longer turn over due to liquid fuel trapped in the cylinder.

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Another Super Duty Glitch

Some 2011-2012 Ford F-Super Duty vehicles equipped with a 6.7L diesel engine built on or before 2-12-12 may exhibit a run-rough and/or misfire concern with or without DTCs P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and P0308.

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Rich Audi

Owners of a 2005 Audi A4 Cabriolet may complain of a long cranking engine at operating temperature. No DTC may be stored in ECM memory.

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DEF Contamination

2011-2012 Ford F-Super Duty vehicles equipped with a 6.7L diesel engine may exhibit DTC P1291 and/or P1292 due to an internally shorted fuel injector. An internal short in a fuel injector may be caused by the fuel being contaminated with diesel exhaust fluid (DEF) or by fuel gelling.

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GMC Wire Chafing

This bulletin addresses concerns for rough running, surging and misfires on 2004-2005 GMC Silverado, Sierra, Kodiak and Topkick vehicles equipped with a 6.6L engine.

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Diesel Injector Clamps

Some 2011-2012 Ford F-Super Duty vehicles equipped with the 6.7L diesel engine built on or before 2-12-12 may exhibit a runs-rough and/or misfire concern with or without DTCs P0300, P0301, P0302, P0304, P0305, P0306, P0307 and P0308.

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