How to tune up your TDI
Today i show ya how to tune up your Diesel engine.
In the injector cleaning part of the video, i dont explane part one, since
its not very safe, however, you dont need to do the first stage, stage two
(boiling in the engine oil) will usually work perfect. add some off the
shelf ATF to really clean them up.
How To: Diagnose Restricted Fuel Supply on a VW TDI
One of the most common causes of starting, drivability and performance
issues in Volkswagen TDI diesels is fuel system restriction -- at the fuel
filter, at the fuel tank, or anywhere in between. Dr. Dan of Dr. Dan's
Biodiesel explains how and why this happens, and what to do about it. Fuel
system plugging is usually caused by contamination from dirty, unfiltered
diesel fuel, but biodiesel often gets the blame! Dan explains the various
causes, symptoms, and consequences of fuel supply restriction in TDIs and
takes us through the process of diagnosing and repairing a restricted fuel
system on a 2000 VW Golf ALH TDI.
2009 VW Jetta TDI - Fuel Filter Change
Fuel Filter Replacement in a nutshell:
1) Replace every 20K miles (I do mine every 10K with oil change).
2) Have the right filter for your housing.
3) Engine OFF! Remove Upper Sound Absorber Panel.
4) Water Separator Service (1 Screw Plug, 1 Washer Seal)
a. Remove Screw Plug and old Washer Seal with Torx T30 bit.
b. Siphon water at bottom of Filter Housing from top of housing - A.K.A
c. Siphon enough fuel to avoid spillage when Housing is opened.
d. Reinstall Screw Plug with New Washer Seal. Torque 3 Nm (27 in-lb).
5) Fuel Filter Replacement (1 Filter, 2 Seals on Filter, 2 Seals in
a. Remove 5 Torx T30 Bolts and lift off Upper Filter Housing with lines
b. If you see any amount of metal particles TAKE THE CAR TO A
PROFESSIONAL! You have a major issue.
c. Pull out old Filter and Seals in Housing.
d. Clean as necessary Lower Filter Housing by Siphoning out remaining
NOTE: Removal of Lower Filter Housing is not a requirement. So long
as you remove any contaminants found at the bottom of the canister by other
e. Install New Filter and New Seals.
f. FILL CANISTER WITH CLEAN FUEL to help purge air. (approx. 650 ml or
22 oz) ---OR--- Use VAG-COM to operate fuel pump from fuel tank to prime
the fuel system (the air will be sent back to the tank to vent) SEE VAG-COM
STEP BELOW (7).
g. Reinstall Upper Filter Housing and secure with 5 Bolts. Torque 5 Nm
6) Reinstall Upper Sound Absorber Panel.
7) If you have VCDS/VAG-COM, operate fuel pumps to purge air from Filter
8) Otherwise, Start Engine & try to run it at 2K RPM for at least 30
seconds. If Engine shuts down, restart engine (this method is not
preferred. it is bad for your High Pressure Fuel Pump).
NOTE: Turning key to turn on Accessories does not turn on the fuel pumps,
from what I have read, only when the key is turned to Ignition (Engine
A visual aid to what to expect when replacing the Fuel Filter on the 2009
VW Jetta TDI (A5 - CBEA ).
I used as a reference the Bentley Publishers VW Jetta Service Manual
(2005-2010) as well as a couple of very good write-ups which can be found
at the following links. Many thanks to those who took the time to document
and share the information at these links.
I obtained the Mann Fuel Filter from IDPARTS.COM (formerly TDIPARTS.COM),
UPS Ground Shipping was free with them. Amazon.com also offers the same
Mann Fuel Filter for those who are exclusive to Amazon.
VW TDI Leaky Injection Pump: Healing With B99 Biodiesel
Dr. Dan of Dr. Dan's Biodiesel takes us through the steps of curing a leaky
injection pump in a Volkswagen TDI. Injection pumps on TDIs and older
diesels are prone to leaks due to ultra-low-sulfur diesel fuel (ULSD) --
NOT due to biodiesel!! When a pump is introduced to ULSD and begins to
leak, an infusion of biodiesel often works to seal it up again. Dan
demonstrates the process of taking a 2000 Golf TDI ALH that is leaking ULSD
and stopping the leak with B99.