Question about 2002 Audi A4

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Audi A4 1.9 TDI 130BHP engine power loss when it's raining

HiI have a Audi A4 1.9TDI 130BHP.Every time when it rains the engine runs at idle and has no power. I've replaced the air sensor, reprogrammed it at Audi main dealer cost me 300 quid, all the hoses related and still runs badly when it rains or after a heavy rain. I don't wanna spend anymore on this issue! Anyone any idea???Please help!Thank you

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This is the correct solution..........replace the solenoid valve N239 as the electrical connection is affected by dampness. What happens is that the EGR valve is jammed open by the solenoid and this allows oxygen starved air into the cylinders (exhaust gas) and combustion is poor.
Quick fix is to disconnect the vac hose to the EGR actuator and block the end with a self tapping screw or pencil. This will work for sure....

Posted on Oct 11, 2011

  • Suman Oct 04, 2013

    Excellent solution!! My car had power loss problem in rain, I changed the N239 also replaced the EGR (Maybe it was not needed, but did as it was covered by my warranty)- now working perfect. Drove last 3 days in rain no powerloss. Thanks a lot... :)

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I know it sounds funny, but check the air flow sensor. They had issues on all models with 100 and 130 bhp turbocharged diesels from audi/volkswagen.

Posted on Aug 16, 2009

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Hi! I think the water from the rain goes on the air filter

Posted on Aug 05, 2009

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If your problem isnt fixed check your coil packs.

Posted on Aug 20, 2009

  • knatterton47 Nov 02, 2014

    Helloo!!!!!!!!!!!!!!!!!!This is a Diesel engine...............

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You can try some damp start spray available from most good car spares shops,its a water repellent that once sprayed on it dries to give a waterproof seal. spray this on all electrical joins and plugs under bonnet, pay particular attention to any sockets at front of engine bay that may be exposed rain/spray entering in from the front as you drive forwards also any near or under fenders,
not too familiar with model but hope this info helps
regards
dave.

Posted on Jul 25, 2009

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