The Ford Barn

Minn-Tex Lee · 08-23-2017, 11:59 AM

I have been fighting a miss for some time. Today while idling the engine, I grounded out #1 and no change. I grounded out #2 and no change. Grounding out #3 and #4 each slowed down the engine speed.
I measured the dynamic pressure at each plug and all were at 90-93 psi.
I do not have the tools to do a leak down test.
I have previously lubed the cylinders with MMO to help in the event it is a valve sticking.
I am guessing a head gasket failure between #1 and #2 cylinders. However wouldn't that keep the pressure from being as high as it is?
I would like to hear some other fixes besides replacing the head gasket.
Your thoughts would be appreciated.
Lee

08-23-2017, 11:59 AM	#1
Minn-Tex Lee Senior Member Join Date: May 2010 Location: Stewrtvl MN-Fredbrg TX Posts: 192	I think I found it I have been fighting a miss for some time. Today while idling the engine, I grounded out #1 and no change. I grounded out #2 and no change. Grounding out #3 and #4 each slowed down the engine speed. I measured the dynamic pressure at each plug and all were at 90-93 psi. I do not have the tools to do a leak down test. I have previously lubed the cylinders with MMO to help in the event it is a valve sticking. I am guessing a head gasket failure between #1 and #2 cylinders. However wouldn't that keep the pressure from being as high as it is? I would like to hear some other fixes besides replacing the head gasket. Your thoughts would be appreciated. Lee