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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKV-A5 Golf/Jettas

VW MKV-A5 Golf/Jettas Discussions area for A5/MkV Jetta/Golf (2005/2006 PD and 2009 CR).

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Old December 4th, 2019, 15:25   #16
dcoollx
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Quote:
Originally Posted by Ol'Rattler View Post
Remove the air filter box and check the major chassis ground underneath it. It is an acorn nut and has worked loose twice on my BRM causing problems. It may not be your problem but is something that could be your problem and should be checked before you look at other things. Most intermittent problems are because of loose electrical connections, corroded/loose grounds being way up there on things that fail.
I did as You said and didn't find anything way outta the ordinary. However many of the grounds were quite rusted so i cleaned them best I could. haven't tested it quite yet. here are some pics
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Old December 5th, 2019, 08:00   #17
crazyrunner33
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The ground under the air box is a cable that connects to the ground on the transmission mount. Two 10mm bolts for the battery tray and you can get to it. I remove that cable and clean it every couple years. The acorn nut is either 10 or 13mm.

To give you an idea of how sensitive these cars are to the ground connection, I had a hard start/no start issue that had all the symptoms of a bad starter. The radio and all other electronic devices operated without a hiccup. The problem ended up being the ground connection, specifically at the connection to the transmission mount.
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Old December 6th, 2019, 18:33   #18
Seatman
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My mk4 PD had a similar issue, just randomly shutting down, sometimes starting, sometimes not starting for a few minutes.
Mine ended up being the cam sensor, new one cured it and it never let me down again.
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