Spark Plug Help

-

ReegDawg707

Active Member
Joined
Nov 6, 2017
Messages
27
Reaction score
6
Location
Ukiah,CA
https://www.napaonline.com/en/p/NGO2635currently running Autolite plugs in my ol 65’ Dart 3.7 225. Ran for a day and then took a ****. New carb, new distributior, wires, cap, rotor and plugs. Mechanic thinks it’s crappy plugs. I purchased NGK V-Power and the old dude behind the counter was pretty hesitant and said “it usually requires Autolites” but I said no. Am I okay putting these on? Or will it mess something up? Thank you in advance!

-Rigo
 
I have always used Autolite's they are cheap and out last Champions


If the plugs are fouled than it's too rich, carb, choke problem ?
 
The good plugs for the early slant sixes are the ZFR5N No. 3459 They are the extended electrode and get the spark into the cylinder where it should be. Whatever plugs you use make sure you remove the gaskets. The plug tubes take the place of gaskets on the early slants.
 
Last edited:
I don't think all the plugs would "take a ****" at the same time. Sounds like you have other issues.
 
I don't think all the plugs would "take a ****" at the same time. Sounds like you have other issues.
It ran well for a day or so then the next time I went to start it, it started up fine then 5 seconds later started sputtering at died. Now it just has the hardest time starting but won’t last longer than the initial start.
 
OK basics. Getting a good spark? Plugs fouled? I am assuming a points system, change the condenser lately with a parts store one? Just FYI
 
OK basics. Getting a good spark? Plugs fouled? I am assuming a points system, change the condenser lately with a parts store one? Check the ballast resistor under a load? Just FYI

upload_2017-10-21_17-39-53.png
 
you running points or an electronic distributor? Ballast in place and functioning?
 
I have always used Autolite's they are cheap and out last Champions


If the plugs are fouled than it's too rich, carb, choke problem ?
I sent the carb off to get rebuilt professionally; I understand there could still be a problem with it if it wasn’t done correctly and The choke seems to be fully operational opening and closing when it needs to. Mechanic suggested I start by replacing spark plugs and go from there. Sound like a decent way to start or y’all recommend somethin else?
 
What is a "whole day" 2 4 6 hours?
I drove it for the first time about 30 minutes round trip, just stop n go from stoplight to stoplight. got home around 4pm and it sat until 10am the next day . Another part store trip 30 minute roundtrip, sat a whole day. The next day went to start it, got down the driveway and started shaking and sputtering and dead. Tried to start it again and it starts for 2 seconds before quitting.
 
If it really is fooled plugs then need to figure out what is causing it.
 
If it really is fooled plugs then need to figure out what is causing it.
I’ll pull them tonight and check them out. Been having a hell of a time with full time job/ and full time college, not as much time as I’m used too haha .
 
https://www.napaonline.com/en/p/NGO2635currently running Autolite plugs in my ol 65’ Dart 3.7 225. Ran for a day and then took a ****. New carb, new distributior, wires, cap, rotor and plugs. Mechanic thinks it’s crappy plugs. I purchased NGK V-Power and the old dude behind the counter was pretty hesitant and said “it usually requires Autolites” but I said no. Am I okay putting these on? Or will it mess something up? Thank you in advance!

-Rigo


People who get weird over putting an NGK plug in a chrysler... meanwhile recommending a Ford plug... just slowly walk back away from them keeping eye contact till you're safely out of that store.

Resistor or non resistor, after that... run whatever brand you decide to be hung up on.

I'll only give you a couple tips when you make that decision...
1. make sure it's a plug that is finished in such a way that you can easily see the mixture color on the base ring and timing mark on the tang.
2.make sure it's the right heat range.
 
People who get weird over putting an NGK plug in a chrysler... meanwhile recommending a Ford plug... just slowly walk back away from them keeping eye contact till you're safely out of that store.

Resistor or non resistor, after that... run whatever brand you decide to be hung up on.

I'll only give you a couple tips when you make that decision...
1. make sure it's a plug that is finished in such a way that you can easily see the mixture color on the base ring and timing mark on the tang.
2.make sure it's the right heat range.
Exactly and I would reccomend that if you use a non Champion plug that you look up the plug manufacturers recconendation and compare it with their conversion chart. Many times the conversion will be a heat range or two off. I found that out the hard way.
 
Not disputing post #3, but search for posts from SlantSixDan since he answered this many times and had a strong opinion (forgot his choice). Also check slantsix.org. BTW, Dan sold his slant car so rarely here now.
 
Check the condenser for the points. The newer ones sometimes fail when they get hot.
 
Autolite plugs are now Chinese garbage (Champions are American garbage). Follow tune-up parts and technique suggestions in this post. Any future counterman who says something stupid like "Durrr...no, because that car requires Autolite spark plugs", smile and nod and back away slowly without any sudden moves.
 
Nailed it the condenser do your self a favor swap over to pointless ignition. I have found that autozone condensers go bad new. The new China stuff has really bad quality control out the box.
 
-
Back
Top