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Re: The evil monkey that lives in my SAAB Posted by SWEDECAR [Email] ![]() ![]() ![]() In Reply to: The evil monkey that lives in my SAAB, pilotalx, Fri, 19 Jan 2007 14:49:43 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I just hold all my fingers crossed that it is solved.
The car was having a significant misfire during acceleration but it was no misfire codes logged and no misfire at all could be seen when studying the live data stream.
I thought that was mighty odd since I could feel it going on.
The car had new IDMs and good plugs.
The only slight anomality I could see was that the air mass meter values were slightly off at idle.
It is a Tech 2 line in the data stream called Airmass deviation and it is displayed as a percentage number (10-14% at idle). It tells the difference between what the AMM is taking in, in air quantity and what it should be taking in as far as the rest of the engine says.
I just took a chance on that value being off and installed a new AMM.
After several test runs I could not feel any misfire and that deviation number had changed to a more neutral value (+-2%).
Anders
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