1990Z51

I am getting constant knock retard. I tried unpluggin gthe sensor and still get knock retard from 6 to 20 degrees. 20 on tip-in and when try to hard accel.
350, miniram, fastburn, medium cam, Super_8dm2.xdf, 1227727 ecm, moates G1 adapter, 27C256 chip.

Been researching for days...

Here is a log file:

5.dcf

ULTM8Z

If this is 1990 or above, it could be the knock sensor board in the memcal going bad.

1990Z51

it is a 1990 corvette, AXCN or ANHX memcal.

Problem is, where do I get a replacement memcal?

1990Z51

Would an auto memcal from 90 or 91 work?

There is a 1990 corvette manual prom on ebay, but I do not think it is actually a 1990 manual memcal: https://www.ebay.com/itm/19601317396...Bk9SR8LNuPPMZA

ULTM8Z

Tunedperformance often has lots of these Memcals.

If you're on Corvetteforum, he goes by Tunedport90.

Are you able to burn your own chips and do your own reprogramming?

1990Z51

Yes, I am buring my own chips with moates hardware. TunerPro and TunerCats softwares.

ULTM8Z

ok, that opens up other options for you besides just Corvette memcals.

Any TPI 350 from a Camaro will also work. Since the 27S256 chip on the G1 adapter is what the ECM is actually running on, the only thing needed is the resistor board in the memcal.... And they're the same across the 350 Camaros and Corvettes I believe.

BTW, what happens if you disable the knock retard entirely within the calibration? Does it still behave the same?

1990Z51

All correct except I have a 29C256 chip. So, now I have huge options for the memcals.

I am going to try diasbling the knock retard table tonight and see what happens. If the knock still present, then would that prove the memcal board is bad?