| Slant Six Forum https://slantsix.org/forum/ |
|
| engine timing mark jitter https://slantsix.org/forum/viewtopic.php?t=34911 |
Page 1 of 1 |
| Author: | ppsi [ Fri Apr 17, 2009 5:28 pm ] |
| Post subject: | engine timing mark jitter |
I have done a complete tune up trying to diagnos a slight miss/stumble at idle and likely underway as well. I've got the following done: Rebuild motor-w-maybe 20K on it. Super six setup-w-Holley 2280 (Bad thing but I've got a BBD I hope to rebuild & install soon) Pertronix electronic ignition New wires, cap, rotor & Autolite #26 plugs Fuel line mod Electric fuel pump-w-clear filter so It isn't a fuel volume problem I tried adjusting this carb but I've realy got no info on the procedure so I just set it at a low idle and messed-w-the 2 idle wixture screws until it got the smoothest idle. An ongoing problem is to get the idle in gear at about 750 so it won't stall it idles at aver a grand out of gear but this is just info and may or may not have an implication in the timing/stumble. I put a timing light on it-I've got this tube thing that I suppose was from the 78 Aspen the motor came from but I see no purpose for it. The timing will show at about 3 degrees btdc and then fall about 3-4 degrees for one rev. That is when I can hear the motor go from very smooth to a slight stumble-not a complete miss. It will drop the timing between 5-6 steady readings and this is the only reason the engine sounds like a sort of miss. I was thinking of changing the coil but would love some other thoughts. Also I figured I would ask about any resources for a new BBD in case anyone knows of one. Thanks Howard Hampstead, NC |
|
| Page 1 of 1 | All times are UTC-08:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|