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EFV-8 Club Forum / General Ford Discussion / tired 59AB...no RPM increase

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Discussion Topic: tired 59AB...no RPM increase -- page: 1 2

supereal

11-18-2017 @ 11:42 AM

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Thank you. I have seem mufflers so full of carbon that you can hardly lift then. It seems unlikely that many valves stick at the same time. I have seen timing gears that are badly worn skip a tooth or two and lose power. It will also occur if the ignition condenser is weak or open. I agree with my friend TomO that a look inside is probably warranted.

MICHV8

11-18-2017 @ 4:53 AM

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Supereal,

No exhaust on the car when I started the task...now have new driver side and waiting on passenger side due next week. Still very LOUD. But thanks for the suggestion. I follow your advice all the time and appreciate your time and effort to help people like me

supereal

11-17-2017 @ 9:34 AM

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Before you start tearing down, be sure that the exhaust system is not plugged. Try a vacuum gauge. If it is stuck valves.the reading should drop 3 to 5 inches, then return. If the reading is normal ( steady at 17 to 21 inches) when first started, then drops to zero, a choked muffler or other exhaust system problem is likely. I have seen mufflers full of carbon, or loose baffles, prevent increasing rpms beyond idle, or same for a bent tailpipe.

shogun1940

11-13-2017 @ 4:12 PM

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If you have compression tester you can remove the valve inside the end that goes in the spark plug hole and use it for a leak down tester and put it back in to do compression test

TomO

11-12-2017 @ 7:01 AM

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When you get a chance, dribble about 3/4 of a pint down the carb with the engine running at a fast idle, then dump the rest down the carb just fast enough to kill the engine. Let it sit for at least 12 hours and try the engine. If you still have the problem, repeat the procedure. If the second time doesn't improve the running, you will have to pull the heads to see what is going on.

Tom

MICHV8

11-12-2017 @ 5:26 AM

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Tom()
Yes, I've added MMO to the fuel and, as you suggested in another post, a qt to the oil. I'm in the process of installing the exhaust system so I can run the engine to operating temp without headphone protection. Cold snap here in MI has delayed things somewhat!

TomO

11-11-2017 @ 6:29 AM

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See topic https://www.earlyfordv8.org/forum/viewmessages.cfm?Forum=18&Topic=2967&keywords=leakdown%20test

This topic was found doing a search in all forums and all in the past dates with the words "leakdown test". You can also search on "leak down test"

Knowing how to search can be a big help on a lot of problems.

Did you try the MMO?

Tom

cliftford

11-11-2017 @ 6:27 AM

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Take an old spark plug, break out the porecelan center, weld or braze a 1/4" pipe coupler to the sh*ll, and screw on a male air fitting that will attach to your shop air hose.

MICHV8

11-11-2017 @ 6:01 AM

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Tom()
How do I modify a plug to hold compressed cylinder air?

MICHV8

11-11-2017 @ 6:00 AM

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Thanks all. I'll pull the intake and see how it goes...

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