riddle me this...

https://youtu.be/u6J_qjbuoOA

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slant six's RULE!
http://www.usajon.com

Well.... I see the gremlin on the dash. Maby hes working on it while you sleep.

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~Nic

Bizarre. Sounds electrical (spark) rather than fuel-related. But that steady rhythm to it is weird. I think for a quick-and-dirty check I'd pull one of the spark plug wires off its plug, insert a bolt, and then hold it near the head with the engine idling. If there's no spark during the dead phase, then it's time to figure out what component is dying or connection is faulty. If there's spark during the dead phase, then it is fuel related and probably in the carburetor.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Suction side of the fuel pump is where I'm drawn.

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Joshua

Piece of crap in the carb.

It's hovering in some orifice blocking as the engine revs up, which then causes the revs to drop, and it then unblocks, repeat.

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

Josh: Nice choice of words!

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67' Dart GT Convertible; the old Chrysler Corp.
82' LeBaron Convertible; the new Chrysler Corp
07' 300 C AWD; Now by Fiat, the old new Chrysler LLC

that's a bobble head lobster mary and me pick up in keywest.fla.
we had bought a dead motor early geo metro Barbie pink convertible for $500 at a donated auction. the auction stated motor was dead. then bought a replace engine from japan inport ebay $750 del. had a local small garage install. they had to take the fuel injection stuff of the japan engine and install our carb stuff/also the oil pan. garage called said small oil leek . I could see it was where the guy hit the pan with a hammer to get it off he also wacked the block. I ask the seller of the motor on ebay. he just said he'd send another free that sometimes that happens on his end.I told him I would try epoxy as I have had luck on aluminum blocks b4. sealed it up. drove from Maryland 2keywest and back to Maryland / 35 mpg with ac on or off. put it on craigslist had some pinup girl buy it said the Barbie pink was one year only rare. told her about every thing. we sold it as it never would go through Maryland emissions never.

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slant six's RULE!
http://www.usajon.com

…except that this behaviour is not dependent on engine speed. It's the same cadence whether the engine is idling or revved up. If it were cyclically starving for fuel like that, we'd expect it to change and get worse with higher revs.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

last night after 3 hours truck started normal/ran normal..
this morning I have some light recyclable's and headed out on the 495 dc beltway 10 mins in it stalled and started the on/off run I crawled back home..still wondering what it is...things aren't what they seemmmmm
https://www.youtube.com/watch?v=lWZ7O-RrATY

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slant six's RULE!
http://www.usajon.com

Check the fuel pickup in the tank. I've had the sock collapse and starve the engine. I took the fuel line off the pump and the cap off the tank and blew into the tank. That cleared it up.

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Joshua

Wait a sec. Does it do this only once the engine is warmed up?

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Had somewhat similar on again-off again symptoms with a warm engine. It was a bad orange box ECU.

Worn distributor gear

Sorry, no help here.

Just wanted to say that the video reminded me of a WWI fighter plane engine, using ignition interruption for throttle control.

Brrrrrp ... brrrrrp ... brrrrrp ...

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"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO

Faulty taillight bulb! Worn-out "cat whisker" window seals! Peeling chrome on the instrument cluster! Sagging seat upholstery!

(since we're throwing random guesses at it )

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一期一会
Too many people who were born on third base actually believe they've hit a triple.