Re: 1978 440 Won't Run
[Re: jim6346]
#3024791
03/17/22 09:40 AM
03/17/22 09:40 AM
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Posts: 18,415 UPPER MICHIGAN, MARQUETTE COUN...
NITROUSN
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Has what appears to be maybe a weak spark (put one of those cheap inline test lights with the #1 plug). Ii either has good spark or it dose not. Should have a nice blue arc out of a plug wire 3/8 of an inch. If so verify compression, verify the distributor is at TDC compression stroke.
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Re: 1978 440 Won't Run
[Re: jim6346]
#3024795
03/17/22 09:59 AM
03/17/22 09:59 AM
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Joined: Nov 2003
Posts: 10,228 Colleyville
3hundred
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You know the drill, compression, fuel, spark, timing, valves that aren't stuck, pushrods in place and not bent... I'd would probably run a hot wire from the battery to pos coil to see if the spark improves. You seem to have covered everything else sparkwise.
'68 Fury Convertible '69 300 Convertible '15 Durango 5.7 Hemi '16 300 S Hemi
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Re: 1978 440 Won't Run
[Re: JohnRR]
#3024890
03/17/22 02:23 PM
03/17/22 02:23 PM
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Joined: Feb 2003
Posts: 10,205 Someplace you aren't
SomeCarGuy
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Knowing I’d tdc is really tdc would be good. Worth a check.
Easy thing at this point would be to bar it over to tdc indicated, then pull distributor. Look at drove slot in the gear. Should be parallel to the crank, or in other words straight across. If it’s close but slightly off, by not much with the timing mark right on tdc, you are 180 out. Roll engine over again to the tdc mark and it should be straight across now. Then reinstall distributor and make sure your rotor is close to number 1, also great time to check firing order.
If you put can’t picture how the gear will look, this will make more sense once you see it both ways, tdc and 180 out.
I want my fair share
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Re: 1978 440 Won't Run
[Re: SomeCarGuy]
#3024891
03/17/22 02:25 PM
03/17/22 02:25 PM
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Joined: Mar 2003
Posts: 559 Newark Valley, NY
jim6346
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Newark Valley, NY
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jlatessa called it, distributor 180 out, ugghhhh. I checked it like 3 times, never fails.
Runs smooth as hell now.
Thanks Everyone!!
jim
Last edited by jim6346; 03/17/22 02:25 PM.
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Re: 1978 440 Won't Run
[Re: JohnRR]
#3024979
03/17/22 07:52 PM
03/17/22 07:52 PM
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Joined: Jul 2011
Posts: 956 Chicago
PurpleBeeper
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Chicago
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Yep & Yep.......OR the ever popular......firing order of plug wires are correct on the cap....but not COUNTER-clockwise like a big block. Ask me how I know this stuff? It's because I make a lot of mistakes and remember stuff One more tip...IF you are indeed "180 out" and you have at least a little slack on all your plug wires, then the easiest way is to move the #1 wire at the cap straight across to the other side of the cap & then move all the other wires appropriately, following the fire order, counter-clockwise. On the other hand, if you don't have any slack, you can also remove the distributor hold down, move cap/wires out of the way, lift up distributor 1", turn rotor 180-degrees, drop distributor back straight down....etc.
Last edited by PurpleBeeper; 03/17/22 09:19 PM.
70 Roadrunner convt. street car
440+6, NOS, 4-spd, SS springs
'96 Mustang GT convt. street car
'04 4.6 SOHC, NOS, auto, lowered
"Officer, that button is for short on-ramps"
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Re: 1978 440 Won't Run
[Re: Magnumguy]
#3025751
03/20/22 02:25 PM
03/20/22 02:25 PM
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Joined: Nov 2003
Posts: 10,228 Colleyville
3hundred
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I thought Chrysler small blocks would run 180 out, not great, but would run. True or not? Nope, BTDT, not true. Well, unless you're a complete screwup and install the cam 180 degrees out, DAMHIK about that..
'68 Fury Convertible '69 300 Convertible '15 Durango 5.7 Hemi '16 300 S Hemi
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