I've been getting this worked on for a few weeks at the dealership, of and on, and nothing yet. I started a thread at tdiclub here, which has brought up a new idea.
Heres my original post:
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My 2005 Passat wagon doesn't always start properly. It's not cold start related thing, as I have noticed it between 0 and 25 degrees Celsius. It does seem to be starved of fuel. So far, if I turn the key a few times to cycle the rear lift pump a few times, it will start no problem. The other odd thing is that I often hear bubble sounds from under the hood when the rear pump first runs, before starting the car as though air is in the fuel lines. My thought is that fuel is running back to the tank somehow when the car isn't running.
Things I have tried so far:
-New fuel filter
-New plastic return T that fits in to filter
-new o-rings on T
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Since this post, the dealership has also replaced the fuel sender unit and some fuel lines. SCFC has been really pretty helpful in the whole thing, and had a loaner for me when they kept my car, which was nice. Unfortunately, they can't find the issue. Right now their theory is that it is related to the crappy glow plug recall that my car has had done, but this doesn't really make sense because I have start issues even with a hot engine, and in warm weather (20 degrees outside).
The tandem fuel pump issue that was posted on TDI club seems like a possibility.
SCFC also said they expect a VW Canada rep to be in in November to review the glow plug issues, but no promises on a new recall.
So I'm not sure where to go from here. I think right now my best bet is to wait for this rep to come and go and see if he has anything to say, and then start over with diagnosing.
If my car is having start issues with a warm engine, and also on nice sunny +20 days, is it reasonable to think this is not a glow plug thing? Also, you Passat TDI guys, do you ever get any loud 'bubble' type noises when your fuel system primes right when you turn the key, before you crank the engine over? It's pretty loud. I should have showed you guys when we had the meet up here in Creekside.
Heres my original post:
------------------------------------------------------
My 2005 Passat wagon doesn't always start properly. It's not cold start related thing, as I have noticed it between 0 and 25 degrees Celsius. It does seem to be starved of fuel. So far, if I turn the key a few times to cycle the rear lift pump a few times, it will start no problem. The other odd thing is that I often hear bubble sounds from under the hood when the rear pump first runs, before starting the car as though air is in the fuel lines. My thought is that fuel is running back to the tank somehow when the car isn't running.
Things I have tried so far:
-New fuel filter
-New plastic return T that fits in to filter
-new o-rings on T
------------------------------------------------------
Since this post, the dealership has also replaced the fuel sender unit and some fuel lines. SCFC has been really pretty helpful in the whole thing, and had a loaner for me when they kept my car, which was nice. Unfortunately, they can't find the issue. Right now their theory is that it is related to the crappy glow plug recall that my car has had done, but this doesn't really make sense because I have start issues even with a hot engine, and in warm weather (20 degrees outside).
The tandem fuel pump issue that was posted on TDI club seems like a possibility.
SCFC also said they expect a VW Canada rep to be in in November to review the glow plug issues, but no promises on a new recall.
So I'm not sure where to go from here. I think right now my best bet is to wait for this rep to come and go and see if he has anything to say, and then start over with diagnosing.
If my car is having start issues with a warm engine, and also on nice sunny +20 days, is it reasonable to think this is not a glow plug thing? Also, you Passat TDI guys, do you ever get any loud 'bubble' type noises when your fuel system primes right when you turn the key, before you crank the engine over? It's pretty loud. I should have showed you guys when we had the meet up here in Creekside.
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