MAF Driven Load?
03-15-2004, 02:11 PM
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MAF Driven Load? Got my new truck MAF in the mail today for
building my "ghetto flow bench". I was bummed
that it didn't produce any output until it occurred
to me it might need an external pullup load (it
works normally, to my eye on the 'scope, with a
1K pullup). My DMM says its output frequency is a
bit whacked, but that's possibly an instrument
problem (TBD).
The Helm schematics don't show the value of the
PCM internal pullup, just a picture of a little resistor
inside the PCM. I wonder if anybody knows its value?
I'm not that keen on applying a short to a live PCM
to measure it... even if it "should be able to take it".
building my "ghetto flow bench". I was bummed
that it didn't produce any output until it occurred
to me it might need an external pullup load (it
works normally, to my eye on the 'scope, with a
1K pullup). My DMM says its output frequency is a
bit whacked, but that's possibly an instrument
problem (TBD).
The Helm schematics don't show the value of the
PCM internal pullup, just a picture of a little resistor
inside the PCM. I wonder if anybody knows its value?
I'm not that keen on applying a short to a live PCM
to measure it... even if it "should be able to take it".
