stefhelm
Well-known member
Hi all,
I know there are a ton of threads on this. I have read a ton of them. Perhaps all of them. Haha. I'd appreciate if some had some insight here. It's intermittent and have had no luck with a shop reproducing at this point.
Car is a 2005 Passat TDI. Issue is a very long crank, only when warm (like an hour after shutting down a hot engine). Its a consistent crank. It does not seem slow and no sputtering or sound of just some of the cylinders firing. Just cranking like no fuel. Sometimes to the point that the "stop" warning pops up on dash, but will always eventually fire. Cold starts are flawless. I don't think it's ever hesitated more than a crank or two on a cold start. This has been going on for a long time, but I've been putting up with it as since Covid, I don't drive a heck of a lot. I've done a bunch of things over last year or two with no improvement. Throwing some parts at it since the issue is intermittent and hard to pinpoint.
I have:
-done injector purge/clean. Injector stabilization values seem fine.
-checked timing and fine.
-replaced crank sensor with new part.
-replaced cam sensor with used part.
-tandem pump was leaking so having to remove it anyway, I replaced it with new.
-EGR - I have a few of these. All used, but no change when I swap them.
-anti-shutter is not stuck. I have had start issue with intake pipe off and felt it was open. I have also tried second used ASV.
-basic service stuff like fuel and air filters.
-lift pump (was pretty sure this was not it but got a new aftermarket one at a good price).
-replaced lift pump relay.
-dont expect glow plug issues since this is a warm engine.
-temp sensor looks good when I'm looking. Again, not sure this would cause a warm start issue anyways.
-should effect start but charge hoses are all good. I pressure tested them.
-should not effect start, but turbo was replaced during the course of this issue existing (because it died)
-other fun facts - BSM is gear drive, has 5 speed swap, runs a Malone stage 1.5 (tune has been there since 90,000km... Long before this issue, so not a suspect).
In general, once running, car pulls, idles, drives really well. There is no symptoms after the starting. Drives great for 320,000km, to be honest.
There are no codes when scanned.
So what's left here? I have not pulled the cam cover since my last timing belt change a long while back. The cam would have about 210,000km. I'm not hearing any popping or performance issue relaxing to worn cam, but maybe something there? How about injection? Is there anything there that could act up (in my mind, I'm thinking all 4 injectors would not act up together and I'd get a few cylinders firing, but could be off base there). I don't want to pop the cam cover without good reason the stupid covers don't like to re-seal.
Also noticing that there is not heaps of smoke when it does fire. Like on a cold winter morning, I've had it crank and crank do to cold, and when it fires, there is a ton of smoke. I don't see that here. Like I just tested it and had a bad start in a closed garage and it was no big deal with smoke. Maybe fueling, but both pumps are new. Is there something else that could stop fuel flow? (But the drive totally fine with no power loss once started?)
I see the starter as a common recommendation for a long crank. If someone can vouch for that, that is helpful. I really don't see that as is is turning over plenty fast in my mind. It does not sound like it's working hard to turn over.
So if you made it this far, thanks for reading. I'd love to hear any ideas beyond what I've already tried.
Thanks a bunch!
I know there are a ton of threads on this. I have read a ton of them. Perhaps all of them. Haha. I'd appreciate if some had some insight here. It's intermittent and have had no luck with a shop reproducing at this point.
Car is a 2005 Passat TDI. Issue is a very long crank, only when warm (like an hour after shutting down a hot engine). Its a consistent crank. It does not seem slow and no sputtering or sound of just some of the cylinders firing. Just cranking like no fuel. Sometimes to the point that the "stop" warning pops up on dash, but will always eventually fire. Cold starts are flawless. I don't think it's ever hesitated more than a crank or two on a cold start. This has been going on for a long time, but I've been putting up with it as since Covid, I don't drive a heck of a lot. I've done a bunch of things over last year or two with no improvement. Throwing some parts at it since the issue is intermittent and hard to pinpoint.
I have:
-done injector purge/clean. Injector stabilization values seem fine.
-checked timing and fine.
-replaced crank sensor with new part.
-replaced cam sensor with used part.
-tandem pump was leaking so having to remove it anyway, I replaced it with new.
-EGR - I have a few of these. All used, but no change when I swap them.
-anti-shutter is not stuck. I have had start issue with intake pipe off and felt it was open. I have also tried second used ASV.
-basic service stuff like fuel and air filters.
-lift pump (was pretty sure this was not it but got a new aftermarket one at a good price).
-replaced lift pump relay.
-dont expect glow plug issues since this is a warm engine.
-temp sensor looks good when I'm looking. Again, not sure this would cause a warm start issue anyways.
-should effect start but charge hoses are all good. I pressure tested them.
-should not effect start, but turbo was replaced during the course of this issue existing (because it died)
-other fun facts - BSM is gear drive, has 5 speed swap, runs a Malone stage 1.5 (tune has been there since 90,000km... Long before this issue, so not a suspect).
In general, once running, car pulls, idles, drives really well. There is no symptoms after the starting. Drives great for 320,000km, to be honest.
There are no codes when scanned.
So what's left here? I have not pulled the cam cover since my last timing belt change a long while back. The cam would have about 210,000km. I'm not hearing any popping or performance issue relaxing to worn cam, but maybe something there? How about injection? Is there anything there that could act up (in my mind, I'm thinking all 4 injectors would not act up together and I'd get a few cylinders firing, but could be off base there). I don't want to pop the cam cover without good reason the stupid covers don't like to re-seal.
Also noticing that there is not heaps of smoke when it does fire. Like on a cold winter morning, I've had it crank and crank do to cold, and when it fires, there is a ton of smoke. I don't see that here. Like I just tested it and had a bad start in a closed garage and it was no big deal with smoke. Maybe fueling, but both pumps are new. Is there something else that could stop fuel flow? (But the drive totally fine with no power loss once started?)
I see the starter as a common recommendation for a long crank. If someone can vouch for that, that is helpful. I really don't see that as is is turning over plenty fast in my mind. It does not sound like it's working hard to turn over.
So if you made it this far, thanks for reading. I'd love to hear any ideas beyond what I've already tried.
Thanks a bunch!
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