5KTQ wierdness...

[Stephen Ankney]

Ned you wrote:

"1st I assume what you have is an air/fuel gauge which is really an
oxygen sensor that is calibrated in air/fuel."

Correct.

"2nd  These are ONLY meaningful when all systems are working properly."

I agree.

"3rd  If the first assumption is true then you have an excess oxygen
situation only, and you must completely throw out any air/fuel stuff
until you determine what is really going on."

OK.

"3rd  In this situation I assume an engine misfire.  Plug, Wire, Coil,
low voltage, or whatever. (This is a textbook case where O2 sensor is
reading lean "?", but the engine is running rich because of the O2
sensor.)"

Ok. About 3 weeks ago I replaced the rotor, cap, wires and plugs(w7dtc)

I used all Bosch products from my local indy Audi/VW repair shop. The only 
thing I did notice while changing these parts out was that the old 
distributor cap was a bit different than the new one I got. The difference 
being that the old cap did not have staggered raised plug end connections. I 
can't imagine this being any sort of problem...

Thinking misfire, I rechecked these components and replaced the coil with a 
spare I have laying around. It cleared things up a bit but there still is a 
lack of power.

I did pull the plugs and all of them are a bit blackish. No signs of 
detonation.

"Someone behind in another car may watch black smoke indicating the TRUE
situation created by the first engine misfire."

I'll try to confirm as soon as I can get a buddy to follow me and watch.

I'm gonna do the fuel filter in the meantime as it hasn't been changed in 
awhile.

Any other ideas?

Thanks.

Steve

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