An interesting theory for someone to try........

When I converted my '88 vanagon to Tiico, I didn't want to take it to the
local dealer to have them set the computer.  So, I purchased a cable and
software from Rosstech.  This software is OBDII compliant, and can be used on
any VW with an OBDII connector.  I called Peter at Tiico and he supplied me
with the connector.  Once I got it wired in, I was able to set the adaptation
(fuel mixture) to a value of 135(default is 128) and it runs perfectly.
(BTW, I've found that adding the O2 sensor makes the engine run so much
smoother.)   Now, stay with me here.... I was recently checking the error
codes on my wife's '96 Jetta Trek with the same Rosstech software.  While
browsing through the settings, I noticed the same adaptation (fuel mixture)
setting as the Tiico's initial value - 128.  I've also found out that by
upping the fuel pressure, the motor seems to respond better during the
initial startup period.  So, I was wondering if you could change the fuel
pressure regulator to the one used by the later A3 ABA motors and not have to
do anything to the computer?  Has anyone on the list tried this?

Chris Stanford
Montgomery, AL