Hi, New Member here. Located in Orange County, So Cal. Have 87 chevy pickup I'm trying to get ready for smog inspection. My ECM has wrong chipset and I think that's the reason it runs rich. I need chips for 5.0L / 700R4. No mods or upgrades to engine now or planned. Can anyone help or suggest where I can purchase or trade my 5.7L chips for what I need? Thanks, Dave
Dang, I literally just UV erased a 91 5.0l 700r4 ARPH chip this morning to burn a 5.7l chip, and you don't live that far from me....... Do you have the 1227747 ECM?
Last edited by c5wagner; 04-01-2019 at 11:28 PM.
Yes, I'm using 1227747 ecm with AKWA chipset. The truck had not run since 2011, had no computer at all when I got it and was missing a few other fuel / emissions parts. The most confusing issue was the IAC motor. The PO replaced the connector but wired it backwards. It took me months to get the idle down where it belongs. I have a cable from Red Devil River and tunerpro RT, logging data shows closed loop running rich. I'm afraid to take it for smog test and fail.
Update to last post: I just looked up the AKWA chip info and found the ECM is not 1227747 but most likely 8747.
That explains why the ADTT chips I bought on ebay did not work. I thought the guy I bought them from was a no good so and so. Now It seems it was all my fault. I will have to reach out to him and apologize. And, tomorrow will go buy another ECM with the proper chips.
Wrong chipset indeed! AKWA is for a 5.7l with th400 transmission. I found an AKTN chip I have for a 1227747 ecm, don't know how good it is since I found it with the uv cover missing but here is the bin I just ripped off of it....
Don't the 305's have smaller injectors too? From memory they do and if so, make sure you have the correct injectors to match the chip.
-Carl
The checksum(801C) is correct so it looks like a good bin and the sun didn't get to it. :)Originally Posted by c5wagner
-Carl
[QUOTE=c5wagner;75171]Wrong chipset indeed! AKWA is for a 5.7l with th400 transmission. I found an AKTN chip I have for a 1227747 ecm, don't know how good it is since I found it with the uv cover missing but here is the bin I just ripped off of it....[/QUOTE.
Thanks. I saved it, but I'm not quite sure how to make use of it just yet. I'm really new at this. I intend on obtaining another ECM tomorrow. This time I will make certain it is a 1227747 with chips for a 5.0L / 700R4
My current box was obtained for me by a friend who thought I had a 350. Neither of us knew it was 1228747 as it was marked 7747 in yellow junkyard paint. It runs pretty good, really.
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