I just burned my first chip for my 87 IROC. I used the ARAP.bin. When i first put the chip in with Moates' adapter, the car would fire, then die. did this a few times, then irt ran, but now my fans stay on all the time, and the service engine light stays on. Anyone know of/ had this happen??? I disabled vats, and turned the fan temps down to 195 on/185 off. Otherwise stock arap. I realize this is a rookie(me) problem, but im not sure what is causing it. Help please.Im using winbin to edit.thanks alot, and I cant wait to get to tuning this thing.
Bob

 

The ARAP is a vette calibration and there are a few minor changes you need to make. One being invert the fan relay operation. It's been comvered a few times in the archives, thou probably someone has the changes off the top of their head.

 

I will search for the fan relay inverting. Also, it runs very poor when it finally stays running. I have to crank it, it will fire and die within 2 seconds. I have to do this repeatedly. after 10-20 tries, it will finally stay running. It is just like it is running out of fuel, as when it does fire, if i touch the gas, it will cough out the intake, and die. I am using winbin to edit, and I have seen a few people have problems with winbin, and am wondering if this is the trouble. Also, my Moates scanning software will not work with this chip, but when I remove the adapter, and just plug the stock memcal back in, everything works perfect. I followed Moates' instructions on his website(pics) to piggyback the stock memcal into it. Any guesses??? thanks alot
Bob

 

The setting is AC pressure switch, either normally open or normally closed. ARAP defaults to normally closed, for my old '82 AC switch I had to change to normally open. Problem solved.

 

If you use winbin....

 

Thanks for the fan info. Now, If only I could figure out wtf is happening, why it runs so crappy, and the scanner wont connect. I dloaded the stock 87 ABWN bin. Im gonna burn that into the flash prom, and try to run it. That should help to isolate the prob.
Thanks
Bob

 

The ARAP uses ungodly timing. Maybe it worked well for what it came on (ZR1?) which was a 32 valve engine, but its as much as 20° high in some areas.

Last night i graphed a AUJN timing table to an ARAP bin and it made a world of difference.

If you want I can send you the bin, its got the fan flag set, 1 change in AE, and the injector constant set to 24lb/hr, other than that its pretty much a stock ARAP with AUJN timing.

 

Cool. If you dont mind, that would be great. Ill try it. Email is goneracin@lynchburg.net.
Im gonna play with the stuff tonite and try to get it all together.
Thanks
Bob

 

I'll be home in an hour. I'll email it to you then.

 

If his fans are staying on all the time, it runs like crap, and he has a constant SES, could the ECM not be accepting the chip he's burning? I had that issue the first time I burned as well. I used a different copy of a bin off the GMecm ftp site and it worked fine.

Just a suggestion.

 

Hi all
Well I have good news. I downloaded a copy of the stock bin for my car (ABWN), made a change to the fan activation temps, just to see if it worked, burned that onto a chip and put it in. It worked perfect:lala: I guess I must have got a bad arap or something. Anyway, thanks for all the help and ideas.
Cant wait to get started, this car has idled like crap since i got it, now i can do something about it.
Bob

 

Sometimes, if you are using eproms, if you don't quite erase long enough, you will get similar problems.

 

Glenn, they are flash proms. I was under the impression that they didnt need erasing. I have another question for you tho. I have read alot of the stuff on here about maf tuning, and there seems to be a big discrepancy about using the maf tables for adding fuel. If you dont use them, how do you selectivly add or remove fuel???? If you change injector constants, that will add everywhere, which may not be needed. What is the best, as I
am ready to fix a crappy idle prob as first goal of burning.
Bob

 

Tpi_roc,

Could you possibly also toss the bin over to me as well? I am currently having issues with the arap code. If I use it and run the car it is fine, then when I shut it off and attempt to restart, forget it. It's a constant problem, I have tried just about everything I can think of thus far. If I pull the power to the ecm to reset it, it will start again easily. I would really like the bin that you did as my car likes to knock under arap. MY e-mail address is eds11979@hotmail.com. Thanks!

 

Its sent.

I forgot to mention I also adjusted the crank tables to shorten the crank time.

 

Tpi_roc,

If you could send me a copy as well that would be sweet. I'm just getting in to PROM tuning and I've noticed that the timing is very aggressive for my setup using the ARAP bin. I'd be interested in see what changes in the VE tables are. cblaser@sys-tec.com

Thanks,
Chuck

 

There are no changes in the VE table

 

If I could get a copy it would be greatly appreciated.

marty@energyguru.com

Thanks'

 

Hey, what's that avatar a picture of? It looks like a dancing towel. I know a guy from another board who has one that looks similar.

 

South Park character, Towelie...

Saw one of those episodes the other night, pretty sweet...

 

Yeah, ummm, hi, Bill Lumburg here, I'm going to need you to ....


:sillylol: Cool avatar Craig! :rockon:

PS Great software, too!

 

By this you mean?

Been using the ARAP for a while now, the timing doesn't seem to be much if any of an issue with me, just crank fueling.

 

Yeah, there's a crank fuel PW vs crank pulse or something like that. Check the archives if need be. It will allow the ARAP to crank up much sooner, no 2-3 second starter workout...

 

Ok, that one I know about and had to mess with also. Thought there was something in there I missed.

 

hey TPI_ROC can you or someone else send me a copy of that bin? I am having the same problem, except my SES light doesnt come on, and everything is connecting fine with craigs software, just the fans stay on all the time

 

The first few times I burned the ARAP bin with Winbin I had a simular problem with the car not running right. Turns out I was in limp home mode because after I changed some values with Winbin, I didn't calculate the new checksum before saving my changes. As for the fans, there is a switch for N/O and changing this will make the fans work right.
I flash FF to the entire chip then program the bin starting at 04000. Works fine and no need to doublestack the bins.

 

tpi_roc, could i also get a copy to see what kind of changes i can expect to make in the arap bin. That is when i get the car running once again. Thank you. btodd83@htc.net