• To ALL forum users - As of late I have been getting quite a few private messages with questions about build ups here on the forum, or tech questions about your personal project. While I appreciate the interest, sending me a private message about these topics distracts from, and undermines the purpose of having a forum here. During the day I wear many hats as a small business owner-operator and I work tirelessly to provide the absolute best service possible to you, our valued customer. When I created this forum I rounded up some of the best minds I knew so that any tech question you might have could be asked and answered by either myself or one of my highly experienced moderators, this way the next time this same question is asked the answer can be easily found and utilized by the next IH enthusiast having the same question. This allows me the freedom to run the day to day operations of the business and minimize the impact to shipments and shop activities that these distractions can cause. It is of the up most importance for me to complete the daily tasks in order to best take care of you our customer, all the while providing you a forum to get the level advice and input you have come to expect and deserve from the premier IH shop in the country.

    So with that I ask that anyone with a question about one of our build ups or a general tech question to please use the forum as it was intended. I am absolutely available by telephone to answer your questions as well but at times may direct you back to our website to better field your question or questions. Most other private messages I will be glad to answer for you.

    Thank you for your understanding.

    Jeff Ismail

Warning--Pilot Automotive Nitrode Spark Plugs SP-NP28


scout II 345 4bbl carb, igniter ignition 400,000 mile engine...

this post is kind of a continuation of my last post on my misfire problems. after curing the misfire with cap, rotor, wires, plugs and coil, i saw an add for this fancy Nitrode Spark plug claiming more spark and claiming to be the best anti foul spark plug ever.
my 400,000 mile engine tends to foul plugs every 2 years or so, i think most of the problem is the engine is worn out, and the rest of the problem is all the elevation changes the scout sees. from about 5,000 feet to about 14,000 feet regularly. if you want to see some pictures of our camping and trail riding look up coloradoscoutii on Instagram.
so i ordered a set of these fancy spark plugs, installed them went for a drive and immediately noticed my idle was down below 500rpm. pulled over adjusted the idle back up, i like it just below 700. also the engine was not running smooth at all, and my vacuum gauge was reading lower then normal. pulled over again and adjusted the idle mixture, but could never achieve normal idle vacuum. continued driving for about 30 min and the motor ran worse and worse till it was misfiring, back firing out of the intake, barley accelerating. got back home, next day took a look at the Nitrode plugs and all 8 were totally black with soot, and some had raw gas on them. so bad that i though my floats were stuck open and raw gas must be dumping down the intake. took a look at floats, floats seemed normal, gas level in bowls was normal. tossed the Nitrode plugs in the trash and reinstalled the NKG spark plugs, and went for a drive and the scout ran perfect. had to re adjust carb back to old settings to get idle to come back down and get normal idle mixture vacuum

long story short beware of this Nitrode plug, save your money and get the plugs that have been around forever and work. maybe the Nitrode plug would work with way more ignition voltage or with coil packs like modern cars have. but for 70's style ignition systems, this plug is a total failure