MAP Sensor signal is normally at 11-13" at idle via the MAP port on the
TB. This means that the manifold vacuum signal is normally around
16-18" at idle. If your cam causes the manifold vacuum signal to drop
down to 11-12", move the MAP signal line over to manifold vacuum...works
like a charm.
The MAP Charger, much more complicated than a simple circuit, works on
Supercharged applications only (Tim, it's coming back to you on next
Wednesday or Thursday) but yes...there's an easy way to fool it with two
POTS.
- Bernd
-----Original Message-----
From: owner-dakota-truck@BUFFNET.NET
[mailto:owner-dakota-truck@BUFFNET.NET] On Behalf Of Aaron Gasparich
Sent: Friday, October 12, 2001 8:55 PM
To: dakota-truck-moderator@bent.twistedbits.net
Subject: DML: fooling the map sensor
From what i understand, the computer sends a 5volt signal to the map
sensor, and the sensor feeds back anywhere from 1.2 volts to the full 5,
depending on the vacum of the engine. So for a cam that would normally
run on low vacum, a device would have to be made limiting the voltage
read to the computer, making it believe its running say 14in of vacum
when its really running 10 or 11. IT would work like a sandwich conector
where its pluged into the sensor, and then the wiring is pluged into the
device. That way the computer wouldnt feed the engine to much feul
because it thinks its at partial throttle. Due to the low vacum. Has
anybody made such a device? And would it work if nobody has? I've seen
them made for high boost aplications, and would think something similar
work for low vacum aplications. that way, we can all have fun cams. And
still idle. I wish i had more knowledge on how to manufactured
electrical stuff. I have the ideas, hust dont know how to make them work
-Aaron
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