Ran across this TSB and thought it was pretty funny

.....a giant pile of bull feces if you ask me


Pi0128
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#PI0128: Engine Misfire/Low Compression - (May 12, 2010)


Subject: Engine Misfire/Low Compression


Models: 2008-2010 Chevrolet Cobalt, HHR

2008-2010 Pontiac Solstice

2008-2010 Saturn SKY

2008-2009 Daewoo G2X

2008-2010 Opel GT

Equipped with 2.0L Engine (VIN X - RPO LNF)
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Condition/Concern:
Some 2.0L Turbo engines may come in with a misfire on one cylinder.

For further misfire diagnosis, a technician should perform a compression test. The results may lead to a cylinder with low compression (85-90 psi). This may be the cause the misfire. The cylinder with the low compression may have a burned/ damaged piston from detonation. The damage to the piston is usually above and below the first compression ring in an area about 25.4 mm (1 in) in length.

Recommendation/Instructions:
Damage of this type to the piston is usually caused by aftermarket equipment (examples are: air induction systems, intercooler cooling devices, NOS systems, ECM calibrations), all designed to boost the output of the engine. This increased output of the engine can lead to severe detonation in certain conditions. If diagnosed with this condition, the vehicle should be inspected for aftermarket performance equipment and/or calibrations (Refer to bulletin 08-06-04-033C for help on Identifying calibrations) and it should be noted on the repair order.

The GM Accessories power upgrade kit by itself is designed for this engine and should be the recommended performance enhancing equipment. Using the GM accessory kit with other aftermarket components could damage the engine as well.

If repairs to the engine are the result of the installation or use of a non-GM approved part, the warranty will not be honored.

 

Interesting.....

 

cooler air inlet temps causing detonation............on what planet does this happen

 

Be careful on those cold mornings! " I'm sorry Mr.Customer, but you drove your SS when the temperature was below freezing, now your warranty is voided." Who wrote this TSB?

 

Are you sure its not a TBS-Total Bull ****. funny the GMTU could also cause this, with say piping, etc. what a crock. Thats kind of like puting that gun disclamer about misfiring while saftey is on

 

I'm sure you mean P0128 rather than Pi0128 or PI0128..........

 

I'm sure it means what it says. PI= Preliminary Information, these are released before TSBs, often they can mature into a TSB but it's not always necessary.

 

My bad...I was thinking of CEL/OBDII codes.

 

I can think of a situation where every one of those could cause detonation. I've seen cold air kits that suck in engine compartment air, intercooler cooling devices that block the air flow, NOS and ECM calibrations can obviously cause detonation.

I am not shocked by the bulletin. GM isn't willing to play nice with the mods.

 

They may be referring to various methods of cooling the intercooler via spraying the cooler itself or alcohol injection. Either would require a some type of tuner to take advantage of. The presence of one or more of the mods listed might prompt the mechanic to look more closely at the ECM when trying to decide the cause of the low compression.