Campaign - Thumping Or Knocking Noise In Fuel Tank Area
20 07 05June 15, 2007
2015111/2
Supersedes Technical Service Bulletin Group 20 number 07-04 dated June 7, 2007 to correct Saga data.
RVU - Thumping, Knocking Or Popping Noise In Fuel Tank Area (IH)
Models
Condition
This RVU has been proactively released to prevent the following condition from occurring in the vehicle:
Customer may report thumping, knocking, popping or similar noise emanating from fuel tank area during or shortly after driving.
This Required Vehicle Update (RVU) is in effect for 15 months from date of publication. After that date, this RVU will expire and no longer be in effect.
Vehicle must meet all of the following criteria:
1. Procedure is valid only for vehicles that show the IH code in the ElsaWeb Campaign/Action Information screen on the day of repair.
2. Vehicle must be within the Limited New Vehicle Warranty.
3. Procedure must be performed within the allotted time frame stated in this Technical Service Bulletin.
4. Procedure must be performed on applicable vehicles in Dealer inventory prior to sale.
Technical Background
Filtration element was too fine in the original in-line filter (part number 4F0 201 801 A) for the leak detection pump. In some cases, the filter becomes obstructed by particulate build-up that impedes tank pressure normalization. This condition leads to nonlinear corrections in tank pressure, thus causing a thumping noise.
Production Solution
Vehicles produced after the specified VIN break are equipped with an improved filter (part number 4F0 201 801 B).
Service
Replace in-line LDP filter with improved part 4F0 201 801 B and verify elimination of the noise.
Warranty
Required Parts and Tools
^ Destroy and properly dispose of removed parts in accordance with local, state and federal/provincial environmental regulations.
All parts and service references provided in this RVU are subject to change and/or removal. Always check with your Parts Department and service manuals for the latest information.