JLKunka
Active member
- Joined
- Feb 8, 2009
- Location
- Richmond, VA
- TDI
- '99.5 Jetta - parts car, '99.5 Jetta - black, '02 Jetta - silver, '13 Jetta DSG - black
'99.5 Jetta - 180,000mi
Let me explain: Ran a tank of B50, clogged the filter pretty quickly. Put new filter in, car ran great. As I drove and refilled with straight pump diesel, performance began to fall off. The engine would struggle to reach 4000 RPM. I figured it was the filter clogging again, but I put a tank of B20 in and performance came back instantly. The engine is rev-happy again.
I ask what is wrong because with the added viscosity of the biodiesel, something is causing the engine to deliver more fuel. It must be one or more of the following:
Let me explain: Ran a tank of B50, clogged the filter pretty quickly. Put new filter in, car ran great. As I drove and refilled with straight pump diesel, performance began to fall off. The engine would struggle to reach 4000 RPM. I figured it was the filter clogging again, but I put a tank of B20 in and performance came back instantly. The engine is rev-happy again.
I ask what is wrong because with the added viscosity of the biodiesel, something is causing the engine to deliver more fuel. It must be one or more of the following:
- worn injector bodies/plungers
- worn injector pump
- bad pump seals