My wife and I once drove a Ford Aerostar minivan to Washington DC to visit our daughter. Shortly after leaving DC, the van would miss and buck in a hard pull in overdrive.
I didn't want to work on it on the road, for fear I'd spend a lot of money for naught. I found that if as soon as I heard the engine began to pull, like on a hill, if I immediately hit the throttle hard enough to kick it out of OD, it wouldn't miss and buck. I babied it 1200 miles home.
A day or two after we got home, I was looking under the hood and noticed one plug wire almost off. Snapped the plug wire back on and no more problem.
One other time, about 1961, I was leaving Albuquerque, NM with a '57 Mercury for the East Coast, by way of home in Nebraska. Last thing before I left Albuque, I had the oil changed at a local Merc dealer, and I told them to go ahead and set the tappets. Mechanical valve lifters.
I got about 50 miles into the desert east of Albuquerque and the engine developed a miss. I pulled off the road by a historical marker. I did enough trouble shooting to eventually pull a valve cover and find a bent push rod. Apparently whoever set the tappets set that one too tight.
It was a solid steel push rod, not a tube. The historical marker had a beautiful smooth granite top. I took a hammer and worked the push rod over until it would roll smoothly across the top to the historical marker. I reinstalled the push rod, set that one tappet, replaced the valve cover, and went on my way. I put another 60K miles on the car with the same push rod.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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