Does the serial data line connect to U2 (64606)? If so, it would seem that the hardware can support 8192 baud rate. Maybe the program on the memcal does not support the 8192 baud data rate. The chipset seems to be the same as an '808, albeit different layout, but you have the "high speed" ...

I'm sure there are several ways to force the hardware into not firing the est pulse, the trick is ensuring that it behaves reliably without any side effects.

I'm assuming you have actually observed the motor when this happens? No hoses in front of turbo collapsing? Definitely do an intake boost leak test. Plug up the intake with a pvc pipe cap or something and stick some compressed air into the manifold via the fuel reg reference hose. Get out the soapy ...

Gareth wrote:

charlay86 wrote:Is anyone interested in flex fuel support?

Yes, I am

Noted.
There seems to be a spare input capture channel available that could be used to read the PWM output signal from a GM flex fuel sensor.

Also on a side note on the VX or VY XDFs, Is there any known locations to turn off the auto 1-2 shift? The eraly stuff has it defined but not the VX VY? The locations can be found, it just takes time. The transmission programs are very similar, so all the parameters will be in the same order. So if...

Sounds like a bad connection.
Since we are dealing with the ECUs entire program and data memory storage, every signal line is critical...
Have you read back the scrambled contents of the nvram with an ic programmer after it has been corrupted? Id be interested to have a look.

Is anyone interested in flex fuel support?

Have you tuned the ECM ?

Have you tried burning the tune onto a regular memcal?

Adjustable coil dwell time so we can use different coils would be good in conjunction with the LS coil ignition driver. The dwell stuff is going that we can achieve is somewhat limited in scope because the system essentially works like a dizzy, but I'll go through the calcs and see what we can do. ...