350TPI Fuel Injectors

[Scot Sealander]

Bruce Plecan wrote:
 
> Has anyone looked at or studied the 6E or other code to see what happens
> when the MAF overloads the input?.

Not a problem to the code.  It may be a problem to accurate fuel
delivery....
It will just go to 254 or so and stay there.  The MAF really can't
overload
the input.  The MAF input is just a 0 to 5V analog to digital
conversion.
I am guessing that a look at the spec sheet for the ADC used will tell
what 
it will do if you put over 5V on the input to that ADC.  


> On the gn list there has been comment that when it overflows the ecm starts 
> over figuring the grms/sec..  So might read 255 and then in the next frame 14, 
> next 30 etc. 

Absolutely untrue for a stock MAF.  It will peg and stay there.  It WILL
NOT roll over to '00'.  The stock MAF is limited to about 144 Hz, as the
ECMs
MAF sampling rate is 160Hz. 

Now if someone ran a MAF at over 160 Hz, THAT might prove
interesting....  
I don't know what the C3 hardware does if it gets a higher frequency
than 
it's sample rate.  Never tried it.  That is something for those who make 
MAF "translators" to take a very careful look at.

Scot Sealander
----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org