Significant hessitation during acceleration - Saab 900 Bulletin Board - Saabnet.com
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Significant hessitation during acceleration
Posted by 88-Vert (more from 88-Vert) on Sat, 8 Mar 2014 08:32:06
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Need some assistance diagnosing this issue.
During major acceleration (gas pedal nearly to the floor) the engine hesitates. The tach doesn't jump around, the turbo gauge needle doesn't jump around, the car simply loses the power for an instant and then comes back. I typically experience this in third gear probably because there is a longer acceleration period, but does occur in all gears.
I've tried to establish a pattern but haven't found anything consistent.
Someone suggested it could be the timing jumping. I have checked the parts to ensure they are all tight... just not sure if there is something specific to the vacuum advance that I can test. Is there something else I need to be looking at? Is the vacuum bottle in the passenger wheel well part of that system? It seems to leak a little bit.
Thanks for the assistance.
R
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