Bob Tom wrote:
> At 06:55 AM 4/18/00 -0500, you wrote:
> >1.481-7.996 in-Hg (Avg 3.423) < this is a 4 year old presumably working MAP
> >sensor
> >6.515-29.021 in-Hg (Avg 12.296) <- this was the bad MAP sensor
> >1.481-9.180 in-Hg (Avg 3.745) <- Brand new MAP sensor
> >
> >I'm also pretty sure that the check engine light that related to a bad MAP
> >sensor is for values too high which makes sense according to these findings.
>
> The latest information that I've been able to get a hold of is that, depending
> of barometric pressure:
>
> 1. with key on and engine off, MAP sensor should be outputting between
> 3.5 to 5.0 volts
>
> 2. at idle, MAP sensor should be outputting between 1.0 and 2.0 volts
>
> Bob. Southern Ontario, Canada.
> '97 Dakota CC Sport, FR, 5.2L, 3.55 SG, auto.
Bob
That jives with what I've measured also. To add more info - 29.5 in-Hg w/key on
engine off and 1.5-8.5 in-Hg while running according to my scan tool on at least 3
different trucks.
I also plan to post (to my website) 3D maps of timing advance both with and
without the MP computer as I have already collected the data. I'll be plotting
rpm vs map with advance points in the z-plane just like the ones at that website.
Will post a URL when I have them completed. Anyone recommend a simple 3D plotting
program that has good output? I want to feed it a flat ascii, comma-delimited
datafile w/3 values per line w/each line as a different timeslice.
Latr,
Shane
-- '96 IndyRam-HisIndy-MPI/TB/Pulleys/Coil/Wires/CompTAs '96 IndyRam-HerIndy-numbered(#142)"Track Truck" '74 Triple-Black Dodge Challenger Rallye 360 home-brew EFI R&D vehicle '68 Black Corvette Convertible 427 (For Sale)
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