Analyze this . . .

[DannL]

Cleaned these 30.6 miles ago. In order from cylinder 1 through 4. #1 was a little wet where I touched the edge with my finger. Thanks in advance.

[F.M.]

Running Rich...

[30 Closed Cab PU]

Was this mostly around town driving? Could try a hotter plug. Had similar issue switch from 3076 to Champion W18s, helped quite a bit. Mine were not wet though

[Werner]

Hallo Dann,
the plugs image is not perfect but not bad. The rear two plugs are also less sooty at my engine than the two from the front. They work there with hotter conditions.
In order to judge the plugs images correctly, you should travel 20 miles quickly, turn off the engine without running idle. Then you can rate the plugs face correctly.

Modern spark plugs are heat tolerant, because they have a "spread" (= multi-range) heat value.

[DannL]

Thanks yall! 14 miles was at 35-40 mph (max that sounds comfortable). The rest was local in-town 30-35. I did shut her down directly after the 14 mile hike. Then pulled the plugs specifically to verify where I was with the GAV. It was only about 1/5 open for this test. Plugs are Champion W16Y.

[F.M.]

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Originally Posted by DannL

Thanks yall! 14 miles was at 35-40 mph (max that sounds comfortable). The rest was local in-town 30-35. I did shut her down directly after the 14 mile hike. Then pulled the plugs specifically to verify where I was with the GAV. It was only about 1/5 open for this test. Plugs are Champion W16Y.

Put in a set of 3X or W18 and try again, they are hotter..

[eagle]

You should be able to get a lean run with the GAV. Then open it up JUST enough to smooth out. Usually I close mine a bit more while cruising. If you can't get a lean run then you need to check into the carb cleanliness, jetting, etc. Also, pull the spark lever down until it pings, then retard it just enough to eliminate the ping.

[WHN]

What setting is your spark plug gap, 35?

They do look like your running mixture is to rich. How did the engine perform on your 14 mile run?

Does your engine feel like it is loading up when you accelerate? Are you using MMO in your gas?

[DannL]

Originally Posted by F.M.

Put in a set of 3X or W18 and try again, they are hotter..

http://pvmafc.org/phpbb/viewtopic.php?f=8&t=3

Originally Posted by WHN

What setting is your spark plug gap, 35?

They do look like your running mixture is to rich. How did the engine perform on your 14 mile run?
Does your engine feel like it is loading up when you accelerate? Are you using MMO in your gas?

Runs well in my opinion. Steady. Reached 40mph for the first time on the flat during that run. That was after 3 months of "fine tuning", and replacing every part under the sun.

.035 on the gap.

Loading up? Not sure about the meaning there. MMO? Is that a particular tasty batch of Moonshine?

[alexiskai]

MMO = Marvel Mystery Oil

[WHN]

Originally Posted by DannL

http://pvmafc.org/phpbb/viewtopic.php?f=8&t=3




Runs well in my opinion. Steady. Reached 40mph for the first time on the flat during that run. That was after 3 months of "fine tuning", and replacing every part under the sun.

.035 on the gap.

Loading up? Not sure about the meaning there. MMO? Is that a particular tasty batch of Moonshine?

Loading up. I was asking if the car seemed to hesitate (not firing on all cylinders) as you accelerate.

If you think it is performing well. Than I would try a hotter spark plug first.

Years ago I bought a set of plugs that I didn’t know were wrong. They looked right, fit right. After running them for a few miles they looked like yours, I needed to clean them every 30 miles or so. I don’t believe that the plugs could have been the problem. They were after all new. Changed plugs, everything is fine.

[DannL]

I've ordered some "other" plugs. We'll see how they perform before I reveal what they are. A fool and his money are soon parted. :-)

[Humperhill]

In my opinion, if its running well maybe leave well enough alone. That last plugs look like you could end up too lean in a heart beat if you start leaning out the fuel/air mixture. However my experience with these motors specifically is very limited.

[Big hammer]

Looks to me #4 is running leaner, check for intake leak. All of your plugs should look the same!

[Werner]

Originally Posted by Big hammer

Looks to me #4 is running leaner, check for intake leak. All of your plugs should look the same!

If there is a intake-leak, then must run #3 leaner too.

[30 Closed Cab PU]

Originally Posted by DannL

http://pvmafc.org/phpbb/viewtopic.php?f=8&t=3




Runs well in my opinion. Steady. Reached 40mph for the first time on the flat during that run. That was after 3 months of "fine tuning", and replacing every part under the sun.

.035 on the gap.

Loading up? Not sure about the meaning there. MMO? Is that a particular tasty batch of Moonshine?

If running MMO (Marvel Mystery Oil) in the gas, sometimes plugs will show additional deposits than if running without it.


It is used to counteract effects of corn (ethanol) gas, provides a little upper end lube, keeps valve from sticking, and helps Carb float needle seating, may be other advantages. Usually added 4 ounces per tankful.
Sometimes added through the intake vacuum port or through the carb air intake to free sticky valves.

[DannL]

Well, to my dismay the Autolite 3076 plugs did not help. They did make the engine sound like it was firing more assertively during idle but . . . on the road any time you would give it gas the plugs we're randomly misfiring. Went back to the Champion W16Y plugs and all is normal. Ordered some W18's and will see if that makes a difference.

[30 Closed Cab PU]

The W16s and 3076 are almost equivalent range plugs for RPMs on an A. The W16 are kinda a dual range plug, they are colder at below 2000 rpm, but hotter above 2000 RPMs for more modern motors.


If you do not read how W16 plugs are designed, the W16 plugs appear to be hotter than a W18, but in an A the W18s are actually hotter than the W16.

[F.M.]

Originally Posted by DannL

Well, to my dismay the Autolite 3076 plugs did not help. They did make the engine sound like it was firing more assertively during idle but . . . on the road any time you would give it gas the plugs we're randomly misfiring. Went back to the Champion W16Y plugs and all is normal. Ordered some W18's and will see if that makes a difference.

Re-read posts #3 & #6

[DannL]

I had found a plug cross reference that put the 3076 up there with the W18. I guess we'll find out soon enough.

[Werner]

Dann,

you can also use modern iridium spark plugs (NGK) with adapter. They have a high heat spread. The center electrode is pulled forward and always burns clean. They are a bit more expensive, but you can drive> 50,000 miles.

I take the lowest heat value.

[DannL]

Now I am a believer. Put some MMO in the tank for the first time. Perty much felt that I had to do it, with all the recommendations. In less than a mile I could easily see the engine was running smoother. Very interesting . . . indeed. Will check plugs in about 30 miles more.

[redmodelt]

I don't understand why all this fuss about what the plugs look like in 30 miles. Put a set in and drive it. Unless it starts to miss don't mess with them. Put some real miles on them.

[DannL]

Ibn

Originally Posted by redmodelt

I don't understand why all this fuss about what the plugs look like in 30 miles. Put a set in and drive it. Unless it starts to miss don't mess with them. Put some real miles on them.

Recently, it only took a few miles to foul the plugs to where the car would no longer start. So, just for now, l'm using 30 as a gauge troubleshooting wise. Oh, l would love to just drive . . . . trust me. But having a car that starts when it's needed is also perty handy. :-)

[F.M.]

Originally Posted by DannL

Ibn Recently, it only took a few miles to foul the plugs to where the car would no longer start. So, just for now, l'm using 30 as a gauge troubleshooting wise. Oh, l would love to just drive . . . . trust me. But having a car that starts when it's needed is also perty handy. :-)

Try looking into your Carb for your problem !!.

[30 Closed Cab PU]

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For fouling in 30 miles I suspect you may only get marginal improvement with the W18s.


Try the w18s, if issue not resolved as FM indicates most likely your carb is running way too rich. Try cleaning the carb, clean the passages/jets, can replace Jets using Renners Corner Jet kit (they come flow tested). Or if you have or can borrow a known good carb. swap in a different carb.

[F.M.]

Originally Posted by 30 Closed Cab PU

For fouling in 30 miles I suspect you may only get marginal improvement with the W18s.


Try the w18s, if issue not resolved as FM indicates most likely your carb is running way too rich. Try cleaning the carb, clean the passages/jets, can replace Jets using Renners Corner Jet kit (they come flow tested). Or if you have or can borrow a known good carb. swap in a different carb.

That is exactly what I said in post #2 above !!..

[30 Closed Cab PU]

Originally Posted by F.M.

That is exactly what I said in post #2 above !!..

Yep, was agreeing with you, a rehash, and adding a suggestion or 2.

[F.M.]

Originally Posted by 30 Closed Cab PU

Yep, was agreeing with you, a rehash, and adding a suggestion or 2.

Yup, You can lead a Horse to water "BUT" !!

[DannL]

I also would agree had I not recently changed carburators at someones suggestion. This horse can't hardly drink much more water. (Thats meant to be a funny btw.) Nobody has suggested an engine rebuild. I wonder why. ;-)

[ETAModel]

DannL, I was going to ask how's the compression, and is she using oil? I'm new on here, but the 30 Fordor I'm driving will hit 45mph before you can say Bob's Your Uncle, (as my Brithish cousin says), and tours along at 50 likes its nothing. I actually have to watch my in town driving or I'll get the red/blue light special.

IMHO, the plugs look a little rich, basing this on years of small engines and farm tractor use. I bought a set of hot range plugs for my Farmall, hoping to lease some farm land, but it fell thru. Now i have to clean #3 plug regularly...I should get a new set of plugs.

Good luck, hope the weather is nicer in OKC than here...BRRRRRR!!!

[wmws]

The fact that MMO helped smooth things out leads me to believe part of your trouble is sticking valves. You are running too rich also. Do you have an air cleaner on there especially a paper one?

[F.M.]

Originally Posted by DannL

I also would agree had I not recently changed carburators at someones suggestion. This horse can't hardly drink much more water. (Thats meant to be a funny btw.) Nobody has suggested an engine rebuild. I wonder why. ;-)

Rebuild the Engine ?? Why,?? Put in the plugs you have been told to and get a GOOD Carburator and drive it all day..

[30 Closed Cab PU]

Originally Posted by DannL

I also would agree had I not recently changed carburators at someones suggestion. This horse can't hardly drink much more water. (Thats meant to be a funny btw.) Nobody has suggested an engine rebuild. I wonder why. ;-)

So you tried another good carb, no help? Re-read this string and did not see this info.


Perhaps a summary of what has been done would help, if the W18s do not solve your issue.