so there is a new tsb out that invovles water leaking into the spark plug wells causing a whole wack load of problems. here is the bulletin for it. and no it is not a recall.

#08-06-04-046: EI08325 - Intermittent Malfunction Indicator Lamp (MIL) - Check Engine Light On, Reduced Engine Performance, DTCs P0300, P0301, P0302, P0303 or P0304 Set (Engineering Information) - (Oct 6, 2008)


Subject: EIXXXXX -- Intermittent Malfunction Indicator Lamp (MIL) -- Check Engine Light On, Reduced Engine Performance, DTCs P0300, P0301, P0302, P0303 or P0304 Set (Engineering Information)


Models: 2007-2008 Chevrolet Cobalt, HHR

2007-2008 Pontiac G5, G6, Solstice

2007-2008 Saturn SKY

with 2.2L or 2.4L Engine (VINs F, B -- RPOs L61, LE5)



Attention: Proceed with this bulletin ONLY if the customer has commented about this concern AND the EI number is listed in GMVIS. If the customer has not commented about this condition or the EI does not show in GMVIS, disregard the bulletin and proceed with diagnostics found in published service information. THIS IS NOT A RECALL -- refer to Service Bulletin 04-00-89-053B for more details on the use of Engineering Information bulletins.



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Condition
Important: If the customer did not bring their vehicle in for this concern, DO NOT proceed with this bulletin.

Some customers may comment on a intermittent MIL/check engine light illuminated. The customer may also comment about poor engine performance.

A scan tool may reveal one or more of the following DTCs stored:

• P0300

• P0301

• P0302

• P0303

• P0304

Cause
This condition may be caused by water intrusion into the spark plug well.

GM Engineering is attempting to determine the root cause of the water intrusion. Engineering has a need to gather information on vehicles that may exhibit this condition. As a result, this information will be used to "root cause" this concern and develop/validate a field fix.

Instructions
If a vehicle is encountered with the above condition, please follow the steps listed below prior to performing any repairs.

Remove the ignition coil and inspect for presence of water in the spark plug well.
If water is not present, visually inspect the boot and spark plug for signs of rust.
If there is evidence of water intrusion, contact the engineer listed below for additional instructions.
The engineer may want the camshaft cover, ignition coil, and spark plug. Parts will be requested back using the WPC return process. Do not ship parts until a request form has been received from the WPC.

 

thanks for the heads up.

 

no worries. anything for my cobalt bretheran and the few sisteran on here as well.

 

Interesting. My car was coughing and sputtering in rain, but it turned out to be my CAI's filter getting soaked. I put an Outerwears pre-filter on and haven't experienced that problem in heavy rain since.

 

ya apparently they just realized this problem and are still trying to figure out what is causing this. as a precaution i would just check and make sure there are no signs of water getting in there.