For a while now my '06 Jetta BRM has an issue when trying to accelerate with a bad shudder. If I accelerate slowly the car is fine but if I step on the throttle then it starts. When I leave work there's a hill I have to climb and if I try to speed up to fast I have a problem. If I give it a little throttle and keep the RPMs under 3k then its fine. If I were to take off from a stop and floor it, the car would shake and shudder a lot. It seems to do it more in 3rd gear than any other, but that could be a coincidence.
Lately I've noticed on one long hill I have to go up that the transmission will shift into 3rd as usual, the RPMs will climb up to about 3k and then just sit there. The car won't go any faster, pressing the throttle to the floor makes no difference and it won't upshift into 4th. As soon as I reach the top of the hill and let up on the throttle a little bit, it accelerates normally. The car isn't shuddering at this point, just won't accelerate.
I thought it was a transmission issue. I was worried about the DMF blowing up, so I've really tried to baby the car. Now I think its probably a fuel/boost issue.
The car starts great, idles fine, has no black smoke when trying to accelerate and as long as I'm not in a rush and use small throttle inputs runs great. I have a new fuel filter on order so in a couple days I will be changing that. I did the timing belt last week and the problem hasn't changed.
If its not the fuel filter, than I will look at the mass airflow sensor. Sounds like it could be a boost issue based on my reading here and other forums. I welcome anyone else's insight to where I might look. I have 119k on the engine and I have not checked for cam wear yet. I have the VCDS tool and can do diagnostics.
Lately I've noticed on one long hill I have to go up that the transmission will shift into 3rd as usual, the RPMs will climb up to about 3k and then just sit there. The car won't go any faster, pressing the throttle to the floor makes no difference and it won't upshift into 4th. As soon as I reach the top of the hill and let up on the throttle a little bit, it accelerates normally. The car isn't shuddering at this point, just won't accelerate.
I thought it was a transmission issue. I was worried about the DMF blowing up, so I've really tried to baby the car. Now I think its probably a fuel/boost issue.
The car starts great, idles fine, has no black smoke when trying to accelerate and as long as I'm not in a rush and use small throttle inputs runs great. I have a new fuel filter on order so in a couple days I will be changing that. I did the timing belt last week and the problem hasn't changed.
If its not the fuel filter, than I will look at the mass airflow sensor. Sounds like it could be a boost issue based on my reading here and other forums. I welcome anyone else's insight to where I might look. I have 119k on the engine and I have not checked for cam wear yet. I have the VCDS tool and can do diagnostics.