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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