File Name: Fiero base mod 10 Code Version: $12P Mk 10 Engine-Gearbox Type: Stock GM 2.8 V6 L44 Muncie M17 3.65 4-speed Mods: Stock Injectors: 15lb stock Description: This is a BASE calibration that I use on a 1986 Pontiac Fiero SE with V6. Still tuning to be done,including cold start/run and AE/DE c...

The BCC is BWYZ. I do have a definition file for this particular code but have not done any work with disassembly. I do want to learn but I am not sure this would be the best project to start with. I am willing to give it a try though.

Eh, it was worth a try.

Your mission, if you chose to accept it, modify the code for a early 90's Cadillac with 4.9 engine and 4T60E (FWD) transmission. The main goal is to be able to use a 2-bar MAP sensor and provide the appropriate fueling, spark, and transmission control for this application. Boost control is not neede...

How about for miles at 4000 pulse p mile. I wnat to make sure my numbers are the same. By the way, thank you for the help. The speedometer currently has an auto-calibration function that relies on the ppm of the vss, so if I can keep all the math correct and use this variable, this will be a good th...

[/quote] If there's say 1250 pulses per kilometer, then the distance travelled per pulse would be 80cm. So you know how far was travelled, and how long it took to travel that distance. So if the time between pulses is 0.05s, then 1/0.05 * 80 = 1600cm/sec, or 57.6km/h[/quote] The math is sound, but t...

Simple enough.

Averaging is taken care of through software by taking several samples and doing the math. I am working with a controller that is operating at 80MHz if this helps any. So what you are saying is that measuring the time between pulses would be the best way to go. Now I need to go about figuring out the...

Hello, I have been lurking for a few months as well as using the 12P code in a Pontiac Fiero and I now have a question. How does the code go about calculating the vehicle speed and if someone could sum this up . I am making a digital instrument cluster and would like to know how GM wrote their code....