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1988 Volvo 740 GLE with B230f engine backfiring.. 700

posted by  Sammy29926 on  Thu Jul 28 09:32 CST 2005
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hi to all Brickboarders,
Recently i replaced ECu in my volvo and it starts know. I am getting a backfire most of th etime when i let the throttle go.. for example whe i am second gear and cruising around 2000rpms and i get on the gas car gains speed and rpms but when i let it go i can hear the engine bacfiring . Everytime i shift the tranny it backfires. My question is do i need to adjust the mix because i installed a used ecu? Or is it my AMm going bad and let the ecu run rich.?
Thank you
Sammy






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