KurtAKX

Well I finally did it! I actually burned the chip two hours ago but I have been busy playing with the car. I went to the junkyard today to get a spare PROM to experiment with (since I am cheap). The guy there sold me the computer with the PROM in it for 20 bucks + tax.

I tried to take the PROM out of the carrier thing (not a memcal, just a carrier), and bent the damn pins. After that I said, "hell, that was just a practice one", got ballsy, and took apart my factory PROM. Managed to get it out without bending pins by destroying carrier. Not being able to wait for my EPROMMER to show up, I went over to my schools Electrical engineering/Computer engineering labs, read the old BIN, peeled off the Delco sticker, threw it in the eraser, stuffed my disk with my modified BIN in the computer, and loaded up the EPROM! First try, everything worked, no complications, no SES, PERFECT!

I only did minor stuff to it, but I love the difference already.

1) I moved the TCC up a few MPH so I can drive in the city without it locking up and forcing me to speed
2) slightly lowered the P/N idle just because I didn't like how high it was
3) added a little fuel since I don't have EGTs yet (moved PE AFR from 13.1:1 to 12.5:1 in the 4800-5600)
4) added a little advance to the main spark table from 1200-4800 (1.05 multiplier in MAP 70-80 kPa, 1.1 multiplier in MAP =85-100 kPa
5) Enabled the extended RPM slope @ 2.0 degrees/krpm up to 5600 RPM
6) made the PE come on sooner (78.1% to 68.4% TPS)
7) Moved the block learn disable up from 3000 RPM to 3300 RPM so I don't go open loop on the freeway anymore
8) I moved the fan on and off temps down, but I don't even have a temp gauge in the car, but I suspect they are not coming on any sooner (maybe fans are not ECM controlled in a 1987 A-body?)

Sorry its long, but I am one excited dude right now!

Kurt


THANKS GUYS!!!!!!!!!!!!!!!!!!!!!

VetNutJim

CONGRATS!
This opens up a whole 'nuther world of having FUN!!!!!
Glad you got it!!!

nape

iTrader: (1)

Sounds like you're having fun already.

Just a word of advice. Don't accidently leave your windows down and the ECM open on the floor when it's going to downpour. It ruined my whole day today. I dried it out with a blowdryer and it runs fine now without throwing any codes but I've gotta go pick up a spare just in case this one starts giving me trouble

Ronny

iTrader: (1)

monsoon/may here in wis !

Grumpy

Kewl,
Now just remember to start off with good notes so you can spot trends of what works for you, and what works for your engine.