After some thought I remembered that with MPI (mulit-point injection) the TB
and upper intake runners never see the gas/air mix which normally keeps it
clean. Any injector cleaner added to the fuel never reaches this area
either. So what you are seeing is PVC vapor build-up with micro dust
particles and the only way to remove it is to clean it out by hand with carb
cleaner. I think its ok to spray carb cleaner in directly while engine is
running with outer intake removed, but CHECK ON THIS, as I'm not sure the
effect carb cleaner has on the O2 sensors.
Marty
Marty Galyean wrote:
> Its likely just intake 'gum'. Gas mixed with dust (too small for filter to
> catch), and some solidifed oil vapor (from the PCV tube on the intake)
> etc. all baked into a gooey mess. You might just need to run some
> injector cleaner through more often (every 5th tank or so). Clean it up
> with carb cleaner while you have it open.
>
> Andy Levy wrote:
>
> > Well, I installed my QuickD TB just a few minutes ago. And I found
> > something very, VERY scary. When I pulled the stock TB, the sweet
> > stench of petroleum hit my like a ton of bricks. The gasket was loosley
> > stuck to the TB (I expected it to adhere to the intake manifold), and
> > had a thin film of an oily substance on it. As did its mating surface
> > on the manifold. Looked at the inside of the TB, and the "engine side"
> > of the vanes was COATED with what looks, feels and smells like oil.
> > Hopped up on the bumper, and shone a flashlight into the belly of the
> > beast.
> >
> > There is a film coating the ENTIRE inside of the intake manifold. I
> > reached a finger inside to touch it. Either it's oil or a VERY
> > convincing substitute.
> >
> > Well, we now know what's causing my ping, don't we? I probably don't
> > even HAVE a belly-pan gasket!
> >
> > This after Sam Dell Dodge told me they checked for an intake manifold
> > leak 2 weeks ago. I go back in on Thursday for them to re-examine the
> > ping. An earful they sahll receive.
> >
> > Please excuse me whilst I take the truck out for a spin to teach the
> > computer a few new things - and see what kind of balls the TB gave it.
> > --
> > -andy
> >
> > http://home.twcny.rr.com/andylevy/ --- andylevy@bigfoot.com
> > -------------------------------------------------------------
> > "We like AMD. The enemy of our enemy is our friend."
> > --- Jonathan Schwartz Sun senior vice president
> > -------------------------------------------------------------
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:56:02 EDT