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Yeah, has been -20 C for about a month now, too cold to even take your hand out of your glove here in Edmonton, Alberta, Canada. I can hardly wait for summer, I think it was on a Tuesday last year! I...

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I had to cut the VATS wire from the CCM to the ECM and then install my VATS module simulator, the engine then fired up.

With a lot of help from Paul Blackmore I was able to create...

Looks good to me, I am viewing at 1152 x 864, keep up the good work!!

Any one know which free program can read this PCM?
I have tried
PCCOMM - (nothing happens)

Freescan - using GM 410B, they communicate, but the values are all wrong.

I tried EFI Live V4 eval -...

Yes, I built that generator, it worked fine on my L99, I tried it on this LT5 , but it doesn't help.

I'll check.. but I think PCCOMM is for 160 baud
have you tried any of the other free programs like winaldl or freescan? Just to verify its not a cabling type issue?

I tried freescan, but it...

The PN for the ECM is 1228331 and it is a 5.7 DOHC V8 "J" LT5 with 2 sets of injectors (16 in total),

should I be able to read this ECM with PCCOMM?

I am trying to read the pcm from a 1991 ZR1 (LT5).
I tried to jumper A to B on ALDL and read from M. I used the same cable I used on my L99. I tried to use PCMCOMM, but I am not having any luck. Any...

Thanks, Robo, but I am still wondering if I need to make the values smaller to add fuel to the mixture?

I concluded this because the values for 100 map are smaller than the values for 20 Map, and...

I am now running without the MAF.
What do the values in the AFRx10,open loop vs coolant temp, vs map represent?
Are they the ratio? ie 81 = 8.1:1
If I read the table correctly I would need to...

I disconnected the MAF, and reflashed PCM to use speed density. It is running a lot better now, just has the odd hesitation about 1/4 throttle in 2nd gear.
I am still trying to decide if it is...

I found the URL for LJ's PCM tutorial under the "basics" heading.
If I change to speed density mode, do I use VE X Rpm X MAP table to adjust my A/F ratio? How do I know if I am running rich or...

My MAF seems to be incorrect for my application.
If the motor is running with MAF plugged in I read about 2 to 4 gm/sec, if I unplug the MAF the default setting is 343 gm/sec. Can anyone give me an...

I purchased Tuner Cat and flashed my PCM to disregard the VATS, I read the PCM in DOS, but could only write from a DOS window, which TC warns me not to do! Hope everything works OK.

Seeing as I...

I am still a long ways away from having it road worthy, I don't think it will be a real powerhouse, but it should have a little more get up and go than the 2.8 ltr it replaced.

It is running now.
1, the injectors were stuck, they were getting a signal. but not opening.
2, once the injectors were fixed the engine would run for about a second and stop.
3, I built a VATS...

Yes, the oil pressure sending unit is hooked up, and the fuel pump is running.

I put an incadescent bulb into the wiring harness for injector no. 1 and it is flashing. I have a spark plug into...

I have transplanted a 1994 L99 into an S-10. I am not a mechanic, or an electronics expert and I don't understand much about programming or hacking. I manufactured a cable as per dwg from...

Hello all, My name is Kevin. I am a machinist, and do a little tinkering on motorbikes and cars.
I own an 86 S-10, which I bought new. The 2.8 ltr under the hood got to almost 160,000 km and spun a...