Identify this chip??

[PaulRV6]

Can you please help me identify this chip? It could be a stock chip. Thanks

 

[626gn]

I've seen factory 86 chips with those markings..

 

[JayC]

Looks like a stock chip to me

 

[dynoman]

Back in the late 80's early 90"s guys in the Electronics Lab at Rochester Products ( home of the QuadraJet carb ) were cloning HyperTech chips and selling them for half the price of HyperTech's . I had one in my GN and this could be one of them . The label looks like it is from a Brady label maker which we used at Delco Products & Rochester Products .
I came across the cloning equipment when my wife took over the Electronics Lab in 2014 .

 

[PaulRV6]

My stock 87 chip has markings on the back with JT8(G)AA29/P. And the questionable chip also has similar sequence. What do these digits mean?

 

[Anthony P]

CMW is the broadcast code for the eeprom used for the factory LC2 engine in '86 models.

Attached is a spreadsheet that lists the GM broadcast codes from about 1985 to 1996 with their respective applications, prom id's, ecms, etc.

 

[PaulRV6]

That is interesting. I am amazed at how much information some of you guys have about these cars. It boggles my mind. Thanks again

 

[Pronto]

Probably not a good idea to run it either way.

 

[626gn]

That is interesting. I am amazed at how much information some of you guys have about these cars. It boggles my mind. Thanks again

Anthony P is next level Encyclopedia Brown with Buick info

 

[PaulRV6]

Well this is just for my test hot air engine, I tried and 87 stock chip and I found this one but didn't know where it came from until now.

Could I ask another question on this thread about the stock 86/87 chip?
What are the parameters for going closed loop

 

[PaulRV6]

That's for sure. Thanks guys. Any insight on my closed loop parameters?