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Okay, as some of you know, blew up my LS1 a month or so ago. I just received word from the extended warranty company that they are denying my claim, stating that the damage was due to "Over-reving" the engine, and that is the only possible way a valve could hit the piston. When in reality, I was slowing down for a stop light when I heard the bang.

I know a few lawyers and they are all going to help me with this, and that is great, but what I really need is some official documention from GM stating that the car has a rev-limiter, and that the purpose of that limiter is to prevent damage, yada yada yada.

I am hoping that one of you guys can possibly obtain this information, or know where I could find it.

Thanks

 

The rev limiter means nothing if you pulled it back a gear too many and mechanically over-revved it. Regardless if that's what actually happened or not, that's a fact they can argue with a manual transmission.

 

That is true, but they are denying it due to me "RACING" it, which voids the warranty. They are also claiming that due to the fact that I have a shift light, I must have been racing it, which I think is crap.

Basically I just want to give them a run for their money, and hope I can come up with enough evidence and such that they will opt to settle it rather than spend all the $$ in court.

 

ttt...

 

This is what you are looking for, its the very last paragraph. I'm posting the whole document to keep it in context. Should the warranty or your lawyer like to see an actual copy of the information, not what was just posted on the net, they can go to any GM dealer and request "SI Document ID 241752" Hope this helps.




Document ID# 241752
1999 Pontiac Firebird


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Fuel Metering Modes of Operation

Modes of Operation
The PCM looks at voltages from several sensors to determine how much fuel to give the engine. The fuel is delivered under one of several conditions called modes. The PCM controls all modes.

Starting Mode
With the ignition ON, before engaging the starter, the PCM energizes the fuel pump relay for two seconds allowing the fuel pump to build up pressure. The PCM first checks speed density, then switches to the mass air flow (MAF) sensor. The PCM also uses the engine coolant temperature (ECT), throttle position (TP), and manifold absolute pressure (MAP) sensors to determine the proper air/fuel ratio for starting. This ranges from 1.5:1 at -36°C (-33°F) to 14.7:1 at +94°C (+201°F) running temperature. The PCM controls the amount of fuel delivered in the starting mode by changing the pulse width of the injectors. This is done by pulsing the injectors for very short times.

Clear Flood Mode
If the engine floods, clear the engine by pushing the accelerator pedal down all the way. The PCM then pulses the injectors at an air/fuel ratio of 20:1. The PCM holds this injector rate as long as the throttle stays wide open and the engine speed is below 300 RPM. If the throttle position becomes less than 80 percent, the PCM returns to the starting mode.

Run Mode
The run mode has two conditions called Open Loop and Closed Loop. When the engine is first started, and engine speed is above a predetermined RPM, the system begins Open Loop operation. The PCM ignores the signal from the HO2S and calculates the air/fuel ratio based on inputs from the ECT, MAF, MAP, and TP sensors. The system stays in Open Loop until meeting the following conditions:

Both HO2S have varying voltage output, showing that they are hot enough to operate properly. This depends on temperature.
The ECT sensor is above a specified temperature.
A specific amount of time has elapsed after starting the engine.
Specific values for the above conditions exist for each different engine, and are stored in the electrically erasable programmable read only memory (EEPROM). The system begins Closed Loop operation after reaching these values. In Closed Loop, the PCM calculates the air/fuel ratio (injector on-time) based on the signal from various sensors, but mainly the HO2S. This allows the air/fuel ratio to stay very close to 14.7:1.

Acceleration Mode
When the driver pushes on the accelerator pedal, air flow into the cylinders increases rapidly, while fuel flow tends to lag behind. To prevent possible hesitation, the PCM increases the pulse width to the injectors to provide extra fuel during acceleration. The PCM determines the amount of fuel required based on throttle position, coolant temperature, manifold air pressure, mass air flow and engine speed.

Deceleration Mode
When the driver releases the accelerator pedal, air flow into the engine is reduced. The PCM looks at the corresponding changes in throttle position, manifold air pressure and mass air flow. The PCM shuts OFF fuel completely if the deceleration is very rapid, or for long periods, such as long closed throttle coast-down. The fuel shuts OFF in order to protect the warm-up three-way catalytic converters.

Battery Voltage Correction Mode
When battery voltage is low, the PCM compensates for the weak spark delivered by the ignition system in the following ways:

Increasing the amount of fuel delivered
Increasing the idle RPM
Increasing ignition dwell time

Fuel Cutoff Mode
To prevent possible engine damage from over-speed, the PCM cuts off fuel from the injectors when the engine speed is above approximately 5800 RPM. Also, see Rapid Deceleration in Deceleration Mode.


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Document ID# 241752
1999 Pontiac Firebird

 

make sure you have the stock tune in the car when the warranty people get a hold of it too(they may claim"well, the rev limiter was raised woth aftermarket programming so it allowed to engine to rev past GM engineered limits"). do you have the stock clutch in there now? if not, get that in there too

 

Extended warranty companies suck. When I worked at the dealer, they questioned a rear axle claim because of a trailer hitch and a transmission claim because of slightly oversized tires. They denied an engine job because the oil change sticker expired. Its BS, but with as many warranty companies going under, its no wonder they are trying so hard to get out of claims.

 

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Great info SUPRYZE.

I agree, this warranty company has denied every claim I have put in, from headlight motors to the starter blowing up my bellhousing, to this recent blown engine.

What a waste of money.

 

stick it to the man. all they wanted was the money, get some back

 

lol I sure hope so.

If anyone else has anything they think would be useful, it would be appreciated.

 

Only thing I can say is to stick with it. My friends 02 chevy blazer had a shitload of problems. First off they sell him the car and within 1 week the SES light comes on (certified pre-owned with 40K miles) and he brings the car back and they give it back to him and the SES light is off. Turns out they simply deleted the code, without even looking for anything, and gave it back to him. Turns out the oil pump was just about gone, and all of a sudden oil pressure drops when he is on the highway and the entire engine is fried. They replace the engine and then the whole PCM ***** the bed, they replace the PCM and then gauges stopped working. In the end he just kept bitching at the extended warranty compant till they bought the car back through GM and let him put the money towarda a new trailblazer. All in all it was a pain in the *** through the entire process but if you make sure that everything is back to stock then just harrass them pretty much everyday and they will get so sick of you that they will just replace whatever you need done to your car. Good luck with everything and hopefully they sack up and replace your engine!