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Re: [T3] excessvie fuel consumption


On 19 Apr 2001, at 21:31, dubdriver wrote:

> Ok, disconnecting the cold start valve/pinching off the fuel line to
> it, did nothing.  I am definitely getting fuel into the crankcase, as
> the oil level rises just a bit after driving the car.  The oil also
> smells of gas and is "thin".  Car runs good, no smoke but is using gas
> like a top fuel dragster!. I looked at one of my "spare" pressure
> sensors and noticed that it has a ground lug mounted to one of the
> rivets that holds it together.  The sensor on the car has no such lug
> and further the sensor is held together by screws instead of
> rivets.......... Again my car is a 72...

I think the ground terminal started in 72. Are you sure that the PS 
in your car is the right one for that year? If you're not sure you have 
the right one, remove it and get the numbers off it and let us know. 
The 72-3 pressure sensor should have a black cap over the 
adjustment screw on the rear end, but these have sometimes been 
removed if the PS was rebuilt or tampered with. Careless tampering 
could leave you running rich. 

Did you find a FI wire connected to the starter? I just realized that 
on a 72, that wire doesn't connect directly there. Here's a different 
way to look for this problem:

Get in the car and turn the key ON. You should hear a click as the 
key goes ON, and a second click ~1 second later. The fuel pump 
should run only between these clicks. Is this what you hear? If the 
pump runs continuously after you turn the key on then there are 
some wires misconnected on the starter. This problem is covered 
in the Bentley manual. Do you have this manual?

> Could the temp sensor II be causing this high fuel consumption?  Any
> way to test these temp sensors with an Ohm meter?  What's the
> resistance range between good and bad?

Yes, this is a possibility. The Bentley manual has all the numbers 
and a rather complete test sequence for the FI system. You're 
flying blind if you're trying to do this without a manual, and the 
Bentley manual is by far the best one.

-
Jim Adney
jadney@vwtype3.org
Madison, WI 53711-3054
USA

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