geostar
Veteran Member
My 2009 Jetta TDI has been disabled for more than two month now. It started in early February will intermittent lack of throttle response. After changing the fuel filter, the problem persisted.
It would come and go and sometimes I couldn’t accelerate at a red light. Then all of a sudden it would kick in. After draining the fuel tank, cleaning the tank, refueling, and then running the fuel and aux pumps with VCDS, I had trouble getting the car to start. Eventually I did get it to start, but then after a test drive, it would start, run and then stall after about 3 seconds. VCDS showed timing faults on injectors 3 and 4.
(The fuel that I removed from the tank looked clean and without water.)
A private VW mechanic found very small metal particles on top of the fuel filter element and then removed the lines between the rail and the injectors. He also saw particles in the standing fuel at the injector fittings. I didn’t see the particles at first with my 50 year old eyes. He suggested that I should replace the pump and injectors, but after reading about some VW goodwill on HPFP (injector pump) failures, I decided to take some pictures and then have it towed to my local VW dealer. My car has seen 110,000 miles.
(The fuel that I removed looked clean and without water.)
After telling the VW service manager the complete story, he seemed sympathetic, but he did say that it would might be a problem, because the private guy may have elimiated the evidence (particles). The VW mechanic started by opening the fuel filter and there were no particles on the top of the element (because my private guy removed and then reinserted it). The mechanic then removed the N290 fuel metering valve on top of the HPFP to check for particles. The fuel in the housing bowl was clean and the screen on the valve was clean. He concluded that there were no particles in the system. I later checked the fuel flow circuit for the HPFP, and it seem odd that he would particle check at the N290, because the schematic shows a fine filter, upstream of the N290. He assured me that the VW procedure was to check at the N290.
He also did not see any low pressure fuel faults, so he concluded that the pump is fine. He is getting a P403 EGR fault, so he is chasing that. But I think he is chasing his tail. It seems like a fuel problem to me because it won’t stay running.
Questions,
1. Opinions on checking for particles at the N290?
2. The particles, that I saw, were very small and not too many. Could the dealer be right and the pump is OK?
3. If the pump has failed, or is failing, why don’t I get a low pressure fault?
4. Would a P403 EGR fault cause the car to stall after three seconds of running?
It would come and go and sometimes I couldn’t accelerate at a red light. Then all of a sudden it would kick in. After draining the fuel tank, cleaning the tank, refueling, and then running the fuel and aux pumps with VCDS, I had trouble getting the car to start. Eventually I did get it to start, but then after a test drive, it would start, run and then stall after about 3 seconds. VCDS showed timing faults on injectors 3 and 4.
(The fuel that I removed from the tank looked clean and without water.)
A private VW mechanic found very small metal particles on top of the fuel filter element and then removed the lines between the rail and the injectors. He also saw particles in the standing fuel at the injector fittings. I didn’t see the particles at first with my 50 year old eyes. He suggested that I should replace the pump and injectors, but after reading about some VW goodwill on HPFP (injector pump) failures, I decided to take some pictures and then have it towed to my local VW dealer. My car has seen 110,000 miles.
(The fuel that I removed looked clean and without water.)
After telling the VW service manager the complete story, he seemed sympathetic, but he did say that it would might be a problem, because the private guy may have elimiated the evidence (particles). The VW mechanic started by opening the fuel filter and there were no particles on the top of the element (because my private guy removed and then reinserted it). The mechanic then removed the N290 fuel metering valve on top of the HPFP to check for particles. The fuel in the housing bowl was clean and the screen on the valve was clean. He concluded that there were no particles in the system. I later checked the fuel flow circuit for the HPFP, and it seem odd that he would particle check at the N290, because the schematic shows a fine filter, upstream of the N290. He assured me that the VW procedure was to check at the N290.
He also did not see any low pressure fuel faults, so he concluded that the pump is fine. He is getting a P403 EGR fault, so he is chasing that. But I think he is chasing his tail. It seems like a fuel problem to me because it won’t stay running.
Questions,
1. Opinions on checking for particles at the N290?
2. The particles, that I saw, were very small and not too many. Could the dealer be right and the pump is OK?
3. If the pump has failed, or is failing, why don’t I get a low pressure fault?
4. Would a P403 EGR fault cause the car to stall after three seconds of running?
