MAF questions

[Marc Randolph]

On Mon, Nov 29, 1999 at 02:27:35PM -0500, Mike Wesley wrote:
> David Cooley wrote:
> <snip> 
> > Is there any way to alleviate the
> > contamination problem (short of going to a paper filter or a MAP based EEC)?
> > Thanks,
> > Dave
> 
> Sounds like an over oiled K&N. They CAN come from the factory like that.
> The problems you have are sort of unusual.
> Also, they don't make that much power. Removing the air silencer is a
> better thing to do (if you haven't already done that).

> Oh..MAF function....
> one of the elements in the MAF measures ambient air temp, the
> electronics heat the other element to 200dec C over ambient. The current
> required to keep the hot element hot, is proportional to the massflow
> over it.

...and temp of that flow, right?


> GM content:
> I have a 749 ECU (AKDA) that I have been playing with (think it's out of
> a turbo truck..Syclone or Typhoon). I noticed that if I set the ID byte
> to $AA, it bypasses the checksum routines. This normal? It did the same
> thing on a 90 'Vette ECU I had also.

Yes, lots (nearly all?) years of GM checksum routines can be bypassed
with AA.

   Marc

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  Marc Randolph     -    mrand at pobox.com    -     PGP keyID: 0x4C95994D
     If you have any info on the mid-60's car called the Bill Thomas
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