I'm getting really frustrated! - Third Generation F-Body Message Boards

Dwayne88IROC · 07-16-2002, 01:16 AM

I've been trying to link to my ECU for a long time now and today I finally thought I would get Diacom to work on my 88 IROC.
I've done all the cbls and freeware.
I found a big problem with my lap top parallel port and got that fixed today. I tested the lap top on my parents 91 caprice and it worked perfect right from the get go but when I tried it on my 88 it wouldn't link in ALDL mode only Diagnostic mode. It linked up after waiting about 30 seconds and it was giving me data. YEAH! I turned the car off and exited Diacom for some dinner. When I went back and did the same thing the car barely ran and after a minute I could no longer stand the rich fumes. I turned off the ignition then I noticed that there was a crapload of error codes the first was a 51-faulty or improperly installed eprom.

Here are some of the others.

45 - rich exhaust
54 FP - voltage malfunction
23, 22,15,14,13,12 WTF?? Can the car even run with all those codes.

I removed the cable and started the car and it ran ok again but was really rich and the RPMs fluctuated between 500 and 1500 for about 2 minutes. Then it idled around 750 and 800 and was back to the same old ok tune. The SES light never stayed on but with Diacom linked it was flashing like I needed the fire extinguisher agian.

I did remember seeing a bunch of data like 48 knock counts and my TPS at idle was .70 a little too high. So in that moment of data reading I did retain some useful info but DAMN.

Linking to the ECU is only the first part of getting this car tuned.
I hope thats the hardest part to this EFI tuning.
Tomorrows another day and I'm hoping for more motivation then.

Kevin91Z · 07-16-2002, 03:22 AM

Diagnostic Mode puts the car into limp-home mode, as if you'd put a paperclip in the ALDL. I wouldnt run it like that. Have you looked at your ALDL connector? Do you have an orange wire in Pin E or Pin M? If its in Pin E only, then connect a jumper to Pin M, or just try removing Pin E and putting it in Pin M.

Dwayne88IROC · 07-16-2002, 11:08 AM

Well that explains why it ran so bad. I doubt if I would have been able to "limp home" in that mode. It ran BAD.

I have Nate's HPP adapter now and it works great in the 91 Caprice.

BLWR PWR · 07-18-2002, 12:54 AM

All that rompin,stompin horsepower waiting to be unleashed on the quiet, sleepy little hamlet known as Lost Almost, oh, I mean Los Alamos. Just a matter of time till you're burnin em from the Chevron to the big hotel!!

james_85Z28 · 07-18-2002, 02:13 AM

did you try the datamaster software for the 165? It works in windows 98 great. I've never had a problem linking up. But it has disconnect a couple times. So if that doesn't link up then something is definitely wrong with either the cable or laptop.

http://www.ttspowersystems.com/dm_dload.htm

The beta is at the bottom of the page. It has 20 free runs.