Thanks Bob. From some recent posts I got the impression that the TPS might be
adjustable somehow but I guess not.
I got my readings using some jumper wires but with the engine off (key on) so I
could manually open up the throttle to WOT to get a reading. That's how my FSM
says to do it but I wonder if I would get a different result with the engine
running... I'll have to try it someday.
Tom
______________________________ Reply Separator _________________________________
Subject: Re: Re[2]: DML: Re: Throttle Position Sensor (Attn: Bob)
Author: <dakota-truck@buffnet.net> at smtpout
Date: 6/12/00 10:53 PM
Hi, Tom
At 09:24 PM 6/12/00 -0400, you wrote:
>So what's the buzz Bob? Did the reset yield any results? As I recall we
got
>around the same voltages from our TPS's which was low as compared to the FSM
>specs. Are yours in spec. now?
I have two TPSs ... the original and one that I picked up when I got F&B tb
.. I was planning on having all 3 sensors on both OE and F&B tb so I would
just have to swap in the tb and hook up the connectors. I took minimum volt
readings of both and went with the one with the higher output but still within
the spec range. When I did the reset, the WOT TBS output was a little higher
than previously but still not at what the FSM says.
>From searching the web on TPS, I have read that our TPS is the automatic
non-adjustable type. My guess is that TPS minimum output varies within an
acceptable
range from manufacturer to manufacturer and, most likely, batch to batch,
and the
computer reads whatever min. volt the TPS puts out and uses it as a base
for closed
throttle upon and adjusts/optimizes for performance. It does make me
wonder if this
may be one of the reasons why one truck can run faster than another ... TPS
and MAP
sensors are still two important sensors used at WOT (along with RPM) to
determine
which mem loc to read in the fuel/timing table.
>Lastly, is there a work around or adjustment that can be made using a
multimeter
>instead of a scanner?? Thanks! Tom
I seem to remember either Shane Moseley or Clay Cook had something on this.
Unfortunately, my disk drive was scrambled about a month ago and I lost all
the emails that I had saved on this. I think that they had a method of
reading the output with a multimeter without using the typical 'piercing
through the insulation to connect with the output wire' method. It's suitable
for getting an idle readout while on the driveway but not sure how I would
do it
for a WOT readout.
Bob
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