Shane,
How come you left your baffles off?
Ron
00 PB SLT QC 4X2 5.9 46RE 3.92 LSD
For modifications see my DML Profile (URL follows)
http://www.twistedbits.net/WWWProfile/dakota/Kw9pV1EkFeOYY
-----Original Message-----
From: owner-dakota-truck@buffnet.net
[mailto:owner-dakota-truck@buffnet.net]On Behalf Of Shane Moseley
Sent: Saturday, March 03, 2001 11:19 AM
To: dakota-truck@buffnet.net
Subject: Re: DML: RE: belly pan gasket
"Bernd D. Ratsch" wrote:
> That's true...under light throttle cruising, it pings pretty bad (IAC
> controls idle). Had that happen to me twice (blown gasket).
Me too. I'm betting that the pinging is due to the quality of the air that
is
entering the combustion chamber. The magnum engines are designed to be
right on
the edge of too much compression for pump gas and therefore are extremely
sensitive to intake air quality. When the gasket goes - the intake air is
being
diluted by the oil vapors - that leads to pinging. Thats also why the
pinging
gets worse when under load.
This theory is based on my having a leaking stock intake and very bad
pinging.
Replaced MAP sensor (oil vapors kills them?) - pinging wasn't quite so bad.
Replaced stock manifold w/MPI and it got lots better but didn't go away
completely. This was very confusing as the MPI has a solid bottom. One
day I
decided to pull the PCV off, plug the line going to the TB and put a vent on
the
valve cover where it was - Bingo! Turns out that my leaving out the baffles
on
my MP valve covers was pulling enough oil vapors through the PCV valve
connection to the TB to cause pinging still. Once the baffles were in, the
pinging went away completely. Then the MP computer went back on - a few
tweaks
later and I'm pulling right up to 6k. Does anyone know how hard it was to
keep
looking at that MP computer sitting in my garage for over a year (because I
couldn't use it due to the pinging)???
Latr,
Shane
ps - Don't leave the pcv off - you will be surprised how quick all kinds of
crap
(sludge, rust, black flacky stuff, etc...) gets glued to the top of your
motor
(on the inside!)....
-- '96 IndyRam-HisIndy-MPI/TB/Pulleys/AccelCoil/MPComp/HookerSuperComps/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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