[T3] Injectors

[Jim Adney]

On 26 May 2016 at 12:50, Tim Keohane wrote:

> Is there a source for rebuilding type3 injectors? Mine are out and I
> see 2 plugs fouled. I've observed this for repeated tune-ups. If not,
> then I'm looking for new. Either way is fine. I'm certain my power
> loss and relatively low mileage (20 mpg) is the result of 2 faulty
> injectors. The power loss occurs as a gradual build up of carbon on 2
> plugs. It runs fine after a tune up and new plugs but over time it
> degrades and I've lurked and checked everything but the injectors. I
> read them from the plugs. 

20 mi/gal is not particularly bad for a '73 with mixed hwy/town 
driving. You should make sure the valve adjustment is correct and a 
compression test might find a different problem. If those all look 
good, check around to see if you can find a local automotive machine 
shop that can test and clean your injectors.

I'm assuming this is always the same 2 cylinders. If not, then there 
may be something wrong that's making things run too rich. One common 
problem with the D-jet that causes this is low system voltage due to 
a worn out voltage regulator. Measure the voltage across the battery 
after the engine is warmed up after a drive and with the engine still 
running at medium rpm. If you see under 13.5 V under these conditions 
replace the voltage regulator with a Bosch 30-019.

-- 
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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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