Fuel stratified injection (FSI) engines are found in VW and Audi cars that use fuel injection technology. From time to time, we diagnose a FSI car with cam follower failure. We thought now would be a good time to discuss this vital component, how it fails, and the symptoms to watch for.
What the Cam Follower Does
The cam follower acts as a barrier between the camshaft lobe and the high-pressure fuel pump. Like any component, the cam follower will eventually wear. Causes of failure can range from using low-quality motor oil to making improper modifications to the fuel pump.
If the cam follower wears all the way, damage to the cam shaft and fuel pump will probably follow. Some mechanics say that the cam follower is more prone to failure if it has undergone certain modifications. These include the installation of an aftermarket high-pressure fuel pump or larger turbos. However, we have observed cam follower failure in cars with both stock and aftermarket parts.
The Symptoms of Cam Follower Failure
A “fuel cut” is a primary symptom. Never heard of this term? A fuel cut is exactly what its name suggests. This is when the car’s engine control unit cuts fuel to the engine. This is a protective measure which keeps the car from detonating because it is running lean.
When a fuel cut occurs, you’ll feel as if your car lost power abruptly, almost as if you just drove into a wall. The car may also lurch a lot.
Is My Car Vulnerable?
We advise car owners to be mindful of their cam follower if they drive a VW or Audi vehicle with a 2.0 FSI engine manufactured between 2005 and 2008.
Get Your FSI Car Checked Out
Drop your car off at Buttera Motors if you notice any red flags during operation. Our story explains why we’re adept at Audi and VW repairs, including diagnosing FSI cam follower failure and other faulty engine parts.
Edited by Justin Vorhees
FSI Engine Diagnosis and Repairs
VW and Audi service in Bothell, Bellevue, Kirkland, Kenmore, Redmond & Woodinville.