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W126 420 SEC Stalling after 2 Minutes

Noidea

New Member
Joined
Aug 18, 2012
Messages
8
Location
Leeds
Car
420 sec
Hi

I have a 1988 420 SEC, she runs fine :confused:for about 2 minutes at 1000 rev idle then slowly dies at about 500 rev. Any suggestion? Fuel pumps / Relays?

If i put my foot down it struggle to maintain a constant rev count. When I put it into drive, the rev drop off, I then have to pump the accelerator to keep the rev counter up.

Any suggestions

Thanks

NOIDEA
 

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