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'89 740 won't rev past 1500 rpm 700

posted by  volvosfive on  Tue Jun 29 02:56 CST 2004
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last visit: Sun Aug 21 08:01 CST 2011
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Hey Everyone,

I finally found out what was wrong with my 740 16 v. It wouldn't rev at all past 1500 or so rpms and it ended up being the ECU. I guess it was shutting off power to the injectors after a certain rpm. Can anyone explain to me why ecu's fail? A few hours after I replaced the computer, the main fuel pump went out completely. It was the original. After I replaced that, the car has been running great. That was two weeks ago and I haven't had problems since. Now I need to replace the tailshaft bushing and I'm set. Any ideas as to what kind of gas mileage to expect from a 16 V car?

Cheers,
Dave






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