Trip computer solution for ALL??

[Allan Jones <ampj@tiac.net>]

To All Fellow Listers,
	I had no problem gettting my trip computer's MPG average and instant
numbers back in line by cleaning the bottom of the fuel metering
system(fuel distributer/mass air-flow sensor plate) as described below.
I thought I'd pass all of the info below as one post to read, digest,
and/or save so that all listers having similar symptoms may know the
solution(or at least a highly probable solution). I believe this
procedure will work for almost all I-5s using the same fuel metering
system, and possibly all cars with the same/similar fuel distributer,
but I am not sure.   ...Anyone else know if this applies to all?

	Regardless, I know '86 and above 4Kqs, 5Ks and C-GTs will benefit from
the following:

> Audial@aol.com wrote:
> > One of the small problems with my "new" Quattro is that the trip 
> > computer reports the incorrect mileage.  Somewhere around 7mpg. How 
> > does the computer assess mileage and which sensor is bad?

Allan Jones wrote:
>       I believe you have an '86 5K, correct? If so, do you know how to
> change(or clean if K&N) the air filter? Because if you do, you must go
> about the same process so that you are able to get UNDERNEATH the mass
> air-flow meter with a spray can. Remove the airbox cover and get it
> completely up and away from the bottom half...I know, if you have the
> same set-up, it's TOUGH! Remove the airfilter so it doesn't get soaked
> and place a rag down on top of the opened airbox(I soaked the living
> daylights out of it). Using fuel-injector/air-intake cleaning spray,
> begin to spray the mass air-flow meter and fuel distributor from
> underneath hitting everything that moves, and anything else that looks
> like it may have a part in your problem(I am not actually sure of what
> causes the problem, so I unscrewed the small plastic cube-shaped
> electronic piece attached to the side of the fuel distributor(it's
> pressurized, so be careful if you do so too) and sprayed away there
> too.... Basically spray and clean any- and every-thing in the area of
> the fuel distributor and you should have a properly operating trip
> computer again. This worked for me(mine now works perfectly again), so
> I hope it helps!

Christopher Olson wrote:
> > Would the same proceedure work with my 89200qt wagon?  It does the 
> > same thing.

Allan Jones wrote:
> Does it HAVE the same thing? What I mean is... does the 200qt have the
> same fuel metering system(an air flow mass-sensor plate on top of the
> air box)? If it does, and it should(as long as the 200 is an I-5 - a
> fact which escapes me at this moment), have something similar, then I
> would say a loud 'yes!'
> 
>               same fuel metering system = same result! (I think?) :-)

Kelly and Bill Reigelsperger wrote:
> I am having similar problems in my CQ.The only functions that work all 
> the time are the range and timer. The instant mpg, avg mpg, avg spd,
> and fuel used functions occationally act as if they're missing some
> info.

	See first paragraph....  :-)

Allan Jones
 '86 Commemorative Design Coupe GT