900 SET still not right! - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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900 SET still not right!
Posted by Stuart (more from Stuart) on Mon, 4 Mar 2002 09:10:58
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Still trying to solve hesitiation problem during gentle acceleration
looked in throttle body, clean as a whistle, butterfly plate moves smoothly
Accel cable adjusted OK
no sign of split vac lines.
Plugs fine (light brown) gaps OK
Air filter clean
So what next? Fuel pump, how can I test - (its £160 to replace) does it post ECU fault ?
Change fuel filter, but its ok at idle.
is the throttle position sensor a potentiomenter, or does it just measure fully closed and fully open positions?
Can any of the fuel/ignition related sensors fail and NOT be picked up as a fault by the ECU?
Also since original daignosis, I notice roughish firing at high speed. The car easilly goes into the red region on turbo pressure guage, and I had the over-pressure cut off ignition thing happen three times the other day (it was hard accel in 5th at 80mph)
posted by 212.104.1...
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