[T3] Chasing Engine Gremlins

[Joe McDiarmid]

send your injectors to Witchhunter Performance in Washington. They clean,
flow test, match, and replace the internal filters of your OG injectors. It
costs $20 per injector, so you'll save QUITE A BIT compared to buying new or
refurb ones, and you know they're right because they're your OG stock ones.
Turn around time for me was 3 days.

best
Joe

On Mon, Apr 11, 2011 at 3:40 PM, Robert Bills <rdbills at aol.com> wrote:

>
> Jim Adney suggested that I check the regulated voltage of my Bosch 30-019
> voltage regulator in my quest to root out the gremlins in my engine (stock
> FI; occasional exhaust "popping" when under load while cold).
>
>
> Results:   The existing regulator tested at 13.5 volts at the battery at
> moderate rpm.  I replaced it with a new unit and tested again.  This time
> the result was 14.7 volts regulated voltage at the battery.
>
>
> I was able to road test my Squareback the next day on a 330-mile round trip
> to a VW event in Solvang CA.  Not only did the engine run better, my fuel
> consumption went from 20mpg to 27.5 mpg.
>
>
> Thanks Jim!!!
>
>
> My next quest is to determine why the idle is rough when cold, and why the
> engine still "loads up" so that I sometimes have to rev it up to "clear" the
> cylinders before it will accelerate like it should.   An experienced (but
> prohibitively expensive) local mechanic looked at my motor and immediately
> observed that the injectors weren't matched (something my inexperience and
> lack of VW knowledge prevented me from seeing).    If that is true, it would
> explain a rough idle.  I suspect that one injector is bad and causing that
> cylinder to load up with fuel at idle and low rpms.  Two injectors (1 & 2)
> have yellow caps at the tip.  No. 4 has a green cap.  No. 3 is the oldest
> and appears to have a black cap.
>
>
> Which are the correct injectors?  (If any)    Please school me on flow
> rates and which injectors are the best for a stock motor with the goal of
> maximizing fuel economy while retaining reasonable performance.   Someone,
> in a forum somewhere else, suggested bus injectors but my limited experience
> has thus far proven that the experts are here, not there.
>
>
> Thanks.
>
>
> Bob Bills
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