| j.grif | -- 09-29-2011 @ 10:07 PM |
|
I have this 21 stud flathead recently put together after being worked over at a machine shop. Not running real good. Seventy pounds pressure on all cylinders and steady 17 on the vacum gage. No.7 plug stays wet after test drives and running the engine. Changed plugs (autolite) and had distributor checked out but No. 7 plug stays black. The lead has a good looking spark when held to the block. The other seven plugs are clean and grey at the tips. The old 97 carb might be part of the problem but only no.7 stays black. appreciate any suggestions
|
|
| BERTHA | -- 09-30-2011 @ 4:20 AM |
|
Try spraying short bursts of starting fluid around #7 intake runner. Bob "it's only original once""
|
|
| supereal | -- 09-30-2011 @ 7:17 AM |
|
I suspect a problem with the plug wire to the number 7 cylinder. It would account for the poor performance and the wet plug. Check the connections on both ends. We solder the connectors in place to be sure of good contact. If you have non metallic plug cables, I'd install metal conductor type. Check the distributor cap to be sure the wire is seated, and that there are no cracks or carbon paths in the cap. Old wires can short inside the metal conduits between the distributor and the heads. One crack in the insulation will do it. For a recently assembled engine, your compression is low. It may be that the rings haven't seated. I'd do a wet/dry compression test to be sure.
|
|
| EFV-8 Club Forum : | https://www.earlyfordv8.org/forum |
| Topic: | https://www.earlyfordv8.org/forum/viewmessages.cfm?Forum=18&Topic=3808 |