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740 started backfiring on deceleration, advice requested. 700

posted by  The Plastic Lizard on  Tue Apr 26 06:18 CST 2005
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Well my goldbrick (the 740 B230F, non-turbo) has started backfiring on deceleration. I can rev it fine, but as I back off the throttle I get some black smoke out the exhaust and a loud "ding" from the engine.

I opened the hood and I could reproduce it by manipulating the throttle. It's the sound of one lead pipe hitting another lead pipe. It seems to be coming from the back of the engine, or the exhaust manifold.

Any ideas?

Thanks folks
--
1991 740 B230F 140K miles






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New 740 started backfiring on deceleration, advice requested. [700]
posted by  The Plastic Lizard  on Tue Apr 26 06:18 CST 2005 >


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