power drop/ stumble - Saab 9-5 Bulletin Board - Saabnet.com
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power drop/ stumble
Posted by Rob T [Email] (more from Rob T) on Mon, 2 Jan 2012 14:34:12
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1999 9-5 3.0
No codes
Starts immediately, idles great
loses power/ stumbles when accelerating/ driving. Can gently tap the throttle to get up to speed.
engine runs smooth when parked, revving the throttle by hand.
Tried another throttle body, no difference.
Replaced cassettes, plugs, Mass airflow sensor
fuel pump relatively recent, new fuel pressure regulator
checked vacuum lines to the best of my ability.
pinched lines that were flexible, but didn't notice any difference- (thought I would...)
Is there anything simple that I am missing? Is there anything that engages differently on the engine- such as the turbo- when the car is parked versus when it is driving?
Thanks for your thoughts,
Rob
posted by 67.253.205...
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