Lol not my intent to bump, without getting way off topic... I was going to rip my ECU,pcm, apart out of one of my Blazers and see but from what i have read and understand about the engine computers is they contain a eprom chip that stores values for all the information available and based on the information the sensors are giving and produces a pacific result. Its static information and can not be altered. The only way to change it is to flash it (which you risk destroying the ecu,pcm) or to take the ECU,pcm apart replacing the chip(eprom) inside the ecu,pcm. The information stored on there is in Hex and if you buy a programmer and emulator you can change the values indefinitely without a set limit. The hardest part is knowing Hexadecimal language and figuring out the values in the table. Would like to know the different systems between 95 and 01. but not relevant to this thread. anyone tried a forced air intake?

 

If you are working with an OBD2 PCM, you will destroy it if you attempt to take it apart. It can be reprogrammed with the proper software (HP Tuners, EFI Live, etc) which is what tuner shops use which does not require any disassembly of the PCM.

The older ECUs used in the TBI motors had a removable EPROM chip, but that went away with the advent of flashable (rewritable) chips.

 

Does using a CAI lower the IAT cause Im using a Spectre CAI and the IAT sensor was reading bout 10 degrees higher than OAT while driving on freeway @ 70mph. Is this normal when using a CAI or is OEM airbox create warmer than 10 degrees in this case. Feel like IAT should be close to OAT

 

Do cold air intakes really work by cooler air charge?

 

I've got a question for ya, the PO of my blazer put a cone specter filter on the end of the stock intake tube. what do you think I should do? Buy an aftermarket tube or go to a junkyard and get a stock airbox.

 

How is a CAI beneficiary? What does it really do?