What causes "dieseling"?
Race Director
Joined: May 2003
Posts: 10,956
Likes: 409
From: California
yes a fully closed throttel plate will help.... try changing gas... this worked well for me, Chevron gas seems to have considerbly less desil effect then other fules i have run... maybe becouse it keeps the combustion chamber cleaner of carbon, thus not ignighting the fuel????. Also, after i put on my CAI this also helped. One other thing, are you running rich at idle? that will also cause this problem...
Thread Starter
Pro
Joined: Aug 2008
Posts: 744
Likes: 19
From: Salzburg Austria
Melting Slicks
Joined: Mar 2005
Posts: 2,838
Likes: 10
From: Austin TX
With little timing (all initial) at idle, the throttle blades have to be opened up pretty good to obtain a reasonable idle RPM, especially if you have a performance cam. This uncovers the transition slots in the carb and when you cut the ignition on a hot engine, she's still pulling fuel from the TS's which often causes dieseling.
Yes, run manifold vacuum to the distributor which will raise your curb idle rpm. Then you can reduce the idle rpm to specs using the idle screw in the mechanical throttle linkage which will close the primary throttle blades and limit the dieseling.
If that doesn't work, there are two or three other tricks we can try. Report back.
Yes, run manifold vacuum to the distributor which will raise your curb idle rpm. Then you can reduce the idle rpm to specs using the idle screw in the mechanical throttle linkage which will close the primary throttle blades and limit the dieseling.
If that doesn't work, there are two or three other tricks we can try. Report back.
Last edited by 73, Dark Blue 454; Aug 16, 2011 at 11:34 PM.
Thread Starter
Pro
Joined: Aug 2008
Posts: 744
Likes: 19
From: Salzburg Austria
Hey guys!
Yesterday I solved the problem of dieseling. Your were right
Now I´m running mainfold vacuum to the distributor and the dieseling is gone!
Thank you so much!
Regards, Günther
Yesterday I solved the problem of dieseling. Your were right
Now I´m running mainfold vacuum to the distributor and the dieseling is gone!Thank you so much!
Regards, Günther
