"False Air" = "Vacuum Leak"

["content22207" <brobertson@xxxx>]

Another term for "false air" is "vacuum leak". With the exception of
PCV, *EVERY* ounce of air that enters your engine should pass over
(and activate) the air sensor plate. Is the only way to meter fuel.
Any air entering via injector seals, bad hoses, old O rings or
gaskets, etc will throw fuel/air mixture off. Is often much more than
minor inconvenience: impossible idle, poor acceleration, excessive
fuel consumption, dirty combustion (how many times do problems like
these crop up on list?). Can not stress enough importance of ensuring
entire upper half of engine is air tight. Good news: is easily within
capabilities of every owner to at least isolate a leak. Just don't
take any seals for granted on a 22 year old block...

Bill Robertson
#5939

>--- In dmcnews@xxxxxxxxxxxxxxx, "David Teitelbaum" <jtrealty@xxxx> wrote:
> If the injectors are that loose you should consider replacing the
> injector seals. I see on most cars they are rock hard and loose
> fitting into the sleeve. Even when you finally get the injector back
> in and clipped the seal will leak. The term is "false air" which is a
> fancy term for air that is getting into the engine and not being
> measured by the air sensor. As for the clips they can be bent a little
> to keep from poping off but if any are missing or broken they should
> be replaced.
> I would go easy on the Armor-all around the motor. Armor-all contains
> silicones and if they find their way into the engine by way of the air
> intake you will contaminate the O2 sensor. Use something like windex
> which is safer or find another cleaner that doesn't contain silicones.
> David Teitelbaum
> vin 10757
> 
> 
> 
> 
> --- In dmcnews@xxxxxxxxxxxxxxx, "B Benson" <delornut@xxxx> wrote:
> > This might sound too simple and maybe it is but, have you verified
> all the
> > injectors are securely in their seals with the hold down clips
> snapped in
> > place? I wipe down my engine every time I wash the car. I polish
several
> > areas with armorall to keep it looking good. In the process hoses
> get pushed
> > around a bit and I have a couple of injector clips that are a bit
> weak. When
> > I notice the engine idling a bit rough I push the injectors down and
> > invariably feel one of the weaker clipped ones go back into place.
> The idle
> > smooths right out. The other area that occasionaly gets disrupted
> while I'm
> > dusting things off is the electrical plug at the vacuum advance
> solenoid.
> > With that unplugged the idle is noticbly rougher and I'd think
either of
> > these things could effect the emission testing.
> > 
> > Bruce Benson