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Re: [T3] 68 Emissions Nightmare

On 6 Mar 2001, at 20:24, Marshall wrote:

> The fuel pressure was up to 50 lbs and he brought it down to 26 lbs which
> is slightly under the specs.

This was a HUGE change. How could it NOT have made a difference? Is 
it possible that your oil is heavily diluted with excess gas which is 
now contributing to the CO measurement. I would adjust the pressure 
to the correct 29 psi.

> Can anyone offer some advice as to fixing this problem?  We are at our
> wit's end over this.  He was suggesting perhaps the previous
> owners put the wrong injectors in.  He was asking if I knew the
> Millisecond ontime of the injectors.  I told him I would try to get that
> info from the list (and any advice offered).

I have one measurement of the injector on time made years ago. I can 
dig it up if you really think it will help, but I have my doubts. 
Still I'm impressed that your mechanic thought to consider this and 
also that he thinks he has the equipment to measure it.

There were 2 possible injectors for your 68, Bosch numbers ending in 
001 (black plastic bodys) or 007 (yellow plastic bodies.) They should 
all be alike.

I would make sure that all the other stuff is right first: timing, 
dwell, advance mechanisms, valve lash, idle speed. Then check 
compression and make sure that all the hoses are installed on both 
ends for the pressure sensor and the pressure switch.

Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA

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