The 90-92 Firebird and Camaro were the first of the P4 generation computers which featured a MAP sensor and speed-density for airflow metering.  These fundamental airflow models were used largely unaltered in later designs.  P4 generation ECM, 8192 baud ALDL communication, “memcal” with 27C256 EPROM.

Hardware Required for Tuning

• G1 Chip adapter and C2 27SF512 chip required to reprogram ECM
• BURN2 Chip Programmer programs 27SF512 chips
• ALDU1 with CABL1 required for datalogging
• Ostrich2 required for real time tuning
• APU1 AutoPROM All-in-one device works great, taking the place of BURN2, ALDU1+CABL1 and Ostrich2

Software Required for Tuning

These computers use the $8D mask from the factory.  There is a “Super $8D” mod that adds extra features beyond the stock $8D code.  It is also possible (and recommended) to run Code59 on the 1227730 for forced-induction applications.

TunerPro RT + the $8D, Super$8D or Code59 definitions works for editing and datalogging.  (this is the recommended software.  It is included with the AutoProm)

TunerCat OBD1 tuner with the $8D definition works for editing.

TTS Datamaster with the $8D definition works for datalogging.

Recommended Purchases

Do it all: APU1 + G1 + a wideband ( LC1 MZTX-L LM2 single channel)

Just burn chips/reprogram: BURN2 + G1 + C2

Just log: ALDU1+CABL1