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2000 Beetle TDI rough / pulsing idle

9050 Views 16 Replies 5 Participants Last post by  h_2_o
Hi everybody, this is the first time I am using this forum.
I just bought a 2000 Beetle TDI GLS manual transmission with 145k miles. The car needs a lot of love and mainly cosmetic repairs (door panels, headliner). I love the way it drives.
The car starts great but it idles very rough, pulsing. When I drive it there is no vibration, just when it idles. The check engine light is on and the plugs light is blinking. The car had the whole engine replaced at 120k miles with a used one with 77k miles on it. This is my first TDI and I have no idea where to start from. Any suggestion will be greatly appreciated. I made a short video so you can see/hear the idle. This is the link https://www.youtube.com/watch?v=n_jjaPlhPGI&feature=youtube_gdata_player

The lady that I got it from said she drove it like that for a couple of months and her mechanic said that it might need a new second air injection pump.

Thank you all in advance
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A buddies tdi had a similar roughness with it. if you know someone with a vcds have them check and adjust if needed the injection quantity. look at this link for help Injection quantity adjustment on fuel pump - Hammer mod | VW TDI forum, Audi, Porsche, and Chevy Cruze diesel forum
Thank you for your response. I'll see if I can find somebody
You also need to get the car scanned for codes. Autozone, etc can do it for free.

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I just bought a OBD2 scanner, I will scan it tomorrow and post the codes here. Thank you
Ok, so these are the codes that I got from the OBD2 : P1562 and P3130
check all your vacuum lines, your vacuum booster bulb or whatever that thing is called and also.
yes check the connection on the egr as well, but i was talking about the vacuum resevoir. but check all the vacuum lines.
Thank you. I will check them and post an update
Thank you! I will check the EGR valve this week and post an update
So I opened the EGR valve and it looks VERY dirty.


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yeah egr and intake need cleaned. if you do it use the fire method on the intake it is both fast and fun :)
So I managed to remove the egr valve and this is how it looks like. The intake needs cleaning too. How do I know if the egr valve will work after cleaning? Is there a way to test it before I put it back in?


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on a side note when you do clean this and the intake wear clothes you can just throw away, that black gunk doesn't come out of anything.
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