Re: # 4 cylinder
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Home away from home
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What is the firing orrder???
Does the spark plug wires run thru a STEEL tube or are the wires simply dangling out in space as most engines do????
Posted on: 2016/10/18 19:20
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VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245 |
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Re: # 4 cylinder
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Home away from home
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Firing order is correct and the wires are not shorting out. I put the plug against the block and I was getting a very good spark.
Posted on: 2016/10/18 19:54
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1938 1601 Club Coupe
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Re: # 4 cylinder
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Home away from home
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Let me repeat the questions:
1. What is the firing order. 2. Do the plug wires run thru a metal tube or are they just floating out in air as do most engine plug wires???
Posted on: 2016/10/18 20:04
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VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245 |
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Re: # 4 cylinder
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Home away from home
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ok. i went and looked up the firing order.
Double chek to be sure if this is right for your engine: 1 6 2 5 8 3 7 4. CHECK to make sure that #7 wire is NOT touching the #4 wire AT ANY POINT. Might want to go thru the ENTIRE firing order to make sure that no plug wire is touching THE NEXT plug wire ready to fire. IF the wires run thru a metal tube then it does not matter if the wires touch each other. There needs to be AT LEAST 1/4" clearence between the wires of any 2 consecutively fireing cyclinders.
Posted on: 2016/10/18 20:40
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VAPOR LOCK demystified: See paragraph SEVEN of PMCC documentaion as listed in post #11 of the following thread:f
https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=7245 |
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Re: # 4 cylinder
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Forum Ambassador
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Phil,
For what it's worth, probably very little, Wade had an issue with his '37 Super 8 a while back when he had a great deal of trouble tracking down a miss. After checking/testing/eliminating/replacing "the usual suspects" he ended up stumped. Then on removing the valve covers, even though all looked to be OK, Wade found that one of the valve springs was broken. A little different to your 120 in that the Super 8 has double(inner and outer) valve springs, but maybe worth having a real close look at #4 while the engine is running?
Posted on: 2016/10/19 0:48
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Mal
/o[]o\ ==== ![]() Bowral, Southern Highlands of NSW, Australia "Out of chaos comes order" - Nietzsche. 1938 Eight Touring Sedan - SOLD 1941 One-Twenty Club Coupe - SOLD 1948 Super Eight Limo, chassis RHD - SOLD 1950 Eight Touring Sedan - SOLD What's this? ![]() Put your Packard in the Packard Vehicle Registry! Here's how! Any questions - PM or email me at ozstatman@gmail.com |
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Re: # 4 cylinder
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Home away from home
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Mal that was what I thought could be the problem so I took a good look while the engine was running. The only thing I questioned was the rapid spinning (compared to the others) of the valve.
Posted on: 2016/10/19 6:17
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1938 1601 Club Coupe
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Re: # 4 cylinder
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Home away from home
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"It doesn't seem to be firing"(#4)
Do you mean not making as much power instead? It's not clear why you suspect this cylinder? Firing can be easily checked. So if it's not firing, as you say, it's an ignition issue that needs fixed and is not puzzling. {I like to take the conductance type timing light and put on the affected wire and check the pattern of light flashes. Or you need an analyzer.} If ignition is good, checks to spec, then it's something else. There's alot of reasons beyond that, so you need a methodical approach.
Posted on: 2016/10/21 9:30
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Re: # 4 cylinder
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Webmaster
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Simple test. Pull the plug wire and plug and hold against the ground metal somewhere and see if it is actually firing the plug. Or use an inline spark tester. Then at least you'll know you're getting spark.
If you are not, then you know it's in the ignition system somewhere: Plug, Wire, Distro, etc. If you are getting spark, and you are sure the firing order is right, then you can pull the valve cover and observe the value action on the cylinder 4 to see if anything is wrong.
Posted on: 2016/10/25 12:46
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-BigKev
1954 Packard Clipper Deluxe Touring Sedan -> Registry | Project Blog 1937 Packard 115-C Convertible Coupe -> Registry | Project Blog |
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Re: # 4 cylinder
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Home away from home
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Thanks for the suggestions but I already did the spark test ( I have spark) and pulled the valve cover and all looks OK in there. I'm going to ponder everything for a while then get on it again.
Posted on: 2016/10/25 14:16
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1938 1601 Club Coupe
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