Re: 440 Stroker Engine Problems In A 1967 Plymouth Fury
[Re: plycuda]
#2775846
05/18/20 05:00 PM
05/18/20 05:00 PM
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sr4440
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I had a chevy do the same thing, would run fine when cold and then when hot it would turn into a dog. Was hard to start when hot. Turned out the coil was bad, changed it and all was good.
Joe
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Re: 440 Stroker Engine Problems In A 1967 Plymouth Fury
[Re: plycuda]
#2775852
05/18/20 05:08 PM
05/18/20 05:08 PM
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get the heat off the carb. The car has a phenolic bodied carb spacer, and a phenolic bodied Demon carburetor on it also so it dissipates heat better.
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Re: 440 Stroker Engine Problems In A 1967 Plymouth Fury
[Re: SportFuryS/23383]
#2775862
05/18/20 05:30 PM
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Here are some more pictures of the engine....
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Re: 440 Stroker Engine Problems In A 1967 Plymouth Fury
[Re: fourgearsavoy]
#2775866
05/18/20 05:38 PM
05/18/20 05:38 PM
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So was there any signs of pistons scuffing as I metal transfer? When you called in the experts did they square up the bores and sign off on "well that was the cause"
Yes there was scuffing but very very minimal and don't believe that caused the problem, our mechanic took the oil pan off the engine and said he "leaned towards" honing the cylinders, and another friend of ours also suggested honing the cylinders as well like we did
Last edited by SportFuryS/23383; 05/18/20 05:38 PM.
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Re: 440 Stroker Engine Problems In A 1967 Plymouth Fury
[Re: fourgearsavoy]
#2775871
05/18/20 05:45 PM
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How was the valve lash at running temp?
Nick set all that up and it was not touched since then
Last edited by SportFuryS/23383; 05/18/20 05:45 PM.
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Re: 440 Stroker Engine Problems In A 1967 Plymouth Fury
[Re: fourgearsavoy]
#2775872
05/18/20 05:47 PM
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The 440 Source heads sounds like a strange part addition since Nick was an Indy head guy. But since your dad was paying the bill I guess he put on what he wanted Gus That would be correct my stepfather wanted the 440 source heads.
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Re: 440 Stroker Engine Problems In A 1967 Plymouth Fury
[Re: lancer493]
#2775876
05/18/20 05:49 PM
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Porous fuel lines,neoprene or steel,can fool you. Same for a clogged sending unit sock, or lack of tank venting.
The car does not have a sending unit sock
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Re: 440 Stroker Engine Problems In A 1967 Plymouth Fury
[Re: SportFuryS/23383]
#2775878
05/18/20 05:52 PM
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We honed out the cylinders .003" and it still does not run
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Re: 440 Stroker Engine Problems In A 1967 Plymouth Fury
[Re: GY3]
#2775884
05/18/20 06:04 PM
05/18/20 06:04 PM
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ZIPPY
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I had a magnetic pickup do this in a '75 Powerwagon a few years back. It would run fine until it got warmed up and then wouldn't start. Turned over fine, though, just no spark. I've had them do that too. Just remember....air, fuel, spark, compression. That's all it needs. The odds of it losing compression and air are slim. It's most likely losing fuel or spark. Check for fuel spark with the condition duplicated. Quick test for ballast resistor equipped stuff, multimeter required: Check coil + voltage key in start vs. key in run. Should have battery voltage in "start", should be around 9v or slightly less depending on ballast value with key in "run". If you've got less than battery voltage with the key in "start" then you're probably on the right track. (This is a pretty common wiring error).
Rich H.
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Re: 440 Stroker Engine Problems In A 1967 Plymouth Fury
[Re: SportFuryS/23383]
#2775886
05/18/20 06:07 PM
05/18/20 06:07 PM
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markz528
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I love the car! Does he live near you - would love to meet him and see the car when I visit my mom.......
My first thought was fuel and the second ignition. You can't rule out fuel pressure unless you have a pressure gauge . Does it have a fuel pressure gauge? My 67 Coronet street car was running out of fuel and to diagnose it I temporarily tied a fuel pressure gauge to the wiper - it told me that my pressure was dropping to near zero on acceleration - was temperature dependant.
You could have an ignition box, pickup or ignition coil failing when it gets hot.
If the pistons were too tight in the wall, I would expect that would be easy to test by trying to turn the motor over with a breaker bar when hot. Should be noticeably harder to turn over. And it should turn over noticeably slower with the starter.
67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......
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Re: 440 Stroker Engine Problems In A 1967 Plymouth Fury
[Re: markz528]
#2775896
05/18/20 06:37 PM
05/18/20 06:37 PM
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440Jim
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My first thought was fuel and the second ignition. You can't rule out fuel pressure unless you have a pressure gauge . Does it have a fuel pressure gauge? My 67 Coronet street car was running out of fuel and to diagnose it I temporarily tied a fuel pressure gauge to the wiper - it told me that my pressure was dropping to near zero on acceleration - was temperature dependant.
You could have an ignition box, pickup or ignition coil failing when it gets hot. The above are my initial thoughts too. Coil, distributor pickup, fuel delivery problem when hot, etc.
Last edited by 440Jim; 05/18/20 06:38 PM.
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Re: 440 Stroker Engine Problems In A 1967 Plymouth Fury
[Re: Jerry]
#2775897
05/18/20 06:38 PM
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too many unknowns here. what does it mean the car doesn't run?
what is the initial timing set at? are you running an electronic distributor or points? is the distributor in 180 degrees? is there a thermostat in the car? if yes take it out. what carb is on the car now? take the throttle cable off the carb. I just ran across this on another site where the throttle cable was hanging up pulling the throttle blades open exposing the idle slots and making the mixture screws in effective. how many different problems are we fighting here. so lets take it one at a time.
also hopefully you didn't hone a full .003 out of the cylinders that's a ton. telescoping gages are not the way to measure the bores. To answer you questions Mr. Jerry we do not remember what the initial timing is set at, we are running an electronic distributor, the distributor not at 180 degrees, there is a thermostat in the car although you cannot see it in my pictures, the carb that is on it right now is a 750 cfm Demon, and unfortunately yes we did indeed hone the cylinders to .003.
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Re: 440 Stroker Engine Problems In A 1967 Plymouth Fury
[Re: markz528]
#2775912
05/18/20 07:18 PM
05/18/20 07:18 PM
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I love the car! Does he live near you - would love to meet him and see the car when I visit my mom.......
Thank you we appreciate that. Yes sir he does.
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Re: 440 Stroker Engine Problems In A 1967 Plymouth Fury
[Re: SportFuryS/23383]
#2775948
05/18/20 08:59 PM
05/18/20 08:59 PM
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JD Dart
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Are the pistons cast or forged? In one bore you have .002 interference.
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