I wouldn't jump on that so quickly without some more testing/research.
It appears that we're on to something...wait and see if we can come up with
some more concrete data.
- Bernd
At 11:38 AM 04/18/2000 -0500, you wrote:
>so, in your opinion. is there any benefit of buying a new aftermarket map
>sensor even if you are not experiencing pinging problems? I have a
>multimeter, I think I'm gonna check mine.
>
>
>
>----- Original Message -----
>From: Shane Moseley <smoseley@ix.netcom.com>
>To: <dakota-truck@buffnet.net>
>Sent: Tuesday, April 18, 2000 6:55 AM
>Subject: Re: DML: Re: MAP Sensor "Issue"
>
>
> > Jon Smith wrote:
> >
> > > With the database Bernd compiled, is there a way to narrow down the
>batch(s)
> > > of these (pinging) MAP sensors? Perhaps ma mopar got ahold of some
>stinky
> > > ones...
> > > <snip>
> > > > P/N#: 56029405
> > > > Number Below the P/N#: 64469D
> > > > Number below that one: 2529BA
> > > >
> > > > My old MAP had the same part number and the same number below the
>PN...but
> > > > the last number is different.
> > > >
> > > > Anyone who works at Dodge (on this list), can you find out what that
>last
> > > > number is?
> >
> > Boy thats interesting - especially considering it cured my pinging problem
> > also. New intake, wires, wire reroute, thermostat, plugs, combustion
>chamber
> > cleaner, etc. all would not do a thing for it. Only the MAP sensor - and
>I
> > picked up massive performance increase all across the rpm range. Not only
>that
> > but when I swapped my bad MAP into my wifes "never pinged" truck - it
>started
> > pinging like an SOB.
> >
> > Here's what I found re: replacements. If you go into Autozone, PrepGurls,
> > Advanced Auto or one of the high volume "discount" places, they will tell
>you
> > that the part costs $85-$90 and is not in stock. Some will even say they
>can
> > not even get it. Others will say it can be gotten thru some kind of
>"special
> > order" which takes a few days (same price). Write down their part number
>and
> > have them look up a MAP sensor for a '93 Dak w/318 - it will be the same
>part
> > number and much cheaper (around $50). This is also a "special order"
>item. If
> > you go down to NAPA - they list part number EC1629 (Echlin part) for both
>Rams
> > and Daks w/V8s. Price here in Nashville's NAPA was $67.88. I bought that
>one.
> > Of the three MAP sensors that I have (2 original from my 2 trucks and 1
>new from
> > NAPA) all looked identical and had the same first 2 numbers and a
>different last
> > number. The bad one had these 3 numbers: 56026770, 64469D, 0396DJ. The
>brand
> > new one had these 3 numbers: 56026770, 64469D, 2855AP. I assume the first
>2 are
> > different from Bernd's because he has a V6 (I think - right Bernd?) and
>they
> > must be slightly different. I can get closeup pix of all three of mine if
>it
> > helps.
> >
> > Some values obtained from my scan tool on the three MAPs are as follows.
> > Remember this is a range of operation over at least 30 miles running in
>the
> > mountains with a good mix of loads applied. Also, keep in mind that these
>are
> > relative to ambient pressure - hence the name Manifold ABSOLUTE Pressure.
>I
> > understand that they read 0-1 bar = 0-100 Kpa = 0-29.5 in-Hg. I assume
>this
> > also translates to 0-5V or 0.2 - 4.8V according to my voltmeter.
> >
> > 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.
> > Can someone confirm this? My reference materials are outside and its cold
>out
> > and I'm still in my pjs and barefoot 8-).
> >
> > Once I put good MAP sensors in my two trucks - they BOTH are now running
>like
> > raped apes. I'm a very happy camper for sure.
> >
> > Latr,
> >
> > Shane
> >
> > ps - someone please double check my figures here as I'm still waking up
>and have
> > only had 1 cup of coffee so far 8-)) Maybe we can put this MAP-related
>pinging
> > stuff to bed once and for all. I'm still amazed at how much difference a
> > good/bad MAP can make.
> >
> > --
> > '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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