page is designed to answer frequently asked Pre
and Post tuning questions...
What Octane fuel Should I
stock engine requires a min. 91 octane fuel.
Always use the highest octane fuel avail at your
local pump in your area, always try to use
gasoline that does not have ethanol
added. Gasoline that is refined to the final
octane is always the best choice.
Why is my "Check
Engine" Light on?
you going to work on your own car you should
invest in a code scanner or a laptop program
such as Vag-Com.
Sometimes parts and components that are near
failing can fail after your tuning. Please scan
your vehicle and tell your salesman the code,
and he/she will work closely with you to resolve
MASS AIR SENSOR FAILURE
Air Sensor is an electrical fuel injection
component that measures the incoming air to your
engine. It is well known in the automotive
repair profession that these newer Bosch sensors
are faulty, even a simple Google search for
"VW MAF Failure" will show tens of
thousands of links to failed sensors worldwide.
Most times when a sensor is failing it will not
even make the "Check Engine" light
even come on to let you know the part is
failing! The most common symptom of a failing
MAF sensor is loss of power. Does you car not
have the same "kick" that it had when
it was new or right after it was chip tuned?
Chances are your MAF needs to be replaced.
DIVERTER VALVE FAILURE
valve is a device that will automatically
release the boost pressure in the intake
manifold, when you let off the gas pedal of a
turbocharged gasoline engine. If this part fails
then valuable boost pressure levels cannot be
obtained. The early 1.8T should have the
Diverter valve updated to the newer part # 06A
145 710N This valve was originally designed for
the 225HP Audi TT Engine.
Why does my Diesel Smoke?
Did you know
that Robert Bosch recommends that your injectors
be rebuilt / replaced at 50,000 mile intervals?
The use of Bio-Fuels
above 5% can also decrease injector life. Your intake
Manifold should also be removed and cleaned
at 50K. We have seen intake manifolds so plugged
with carbon that the engine will not start or
run! There is a snow
screen in your stock air cleaner box that is
also notorious for plugging with debris.