Mass Flow Meter Questions

[Peter Fenske]

Hi Bob

Some of the FM mafs used also had the Mat included.
That is why 5 pins 3 for Maf 2 for Mat

If you gota  V8 bosch the other two pins are for
the burnoff function

Have fun:peter




"Robert W. Hughes" <rwhughe at ev1.net> on 06/03/99 03:48:42 PM

Please respond to gmecm at efi332.eng.ohio-state.edu
                                                              
                                                              
                                                              
 To:      gmecm at efi332.eng.ohio-state.edu                     
                                                              
 cc:      (bcc: Peter Fenske/BCIT)                            
                                                              
                                                              
                                                              
 Subject: Mass Flow Meter Questions                           
                                                              








Well, I need a little help. Spent several days going through local
pick-a-part places and finally found one mass flow meter on a 1987
Chevrolet Celebrity.

I was expecting three pins on the connector but there were five. After
some digging I found this:
Marked on sensor    wire color     ECM connection
M              Tan       F16 MAF signal
M              Purple         5v return
+              Orange         MAF relay to +12v
-              Black-white    Ground
F              Brown-white    F10 MAF signal

I connected the thing to 12volts and ground but could get no response
from either the M or F lines. Does anybody know what these are and what
sort of signal I should see?
--
Robert W. Hughes (Bob)
BackYard Engineering
Houston, Texas
rwhughe at ev1.net