There's been lots of talk in the last few years about high resistance in Champion spark plugs. I have seen many of those failures and started using only Tempest plugs many years ago. Recently I had a customer who could not hot start his RV-8 (fuel injection), and the problem jsut recently began. Less than 2 months ago I had replaced the upper plugs with BR8EIX and the lower plugs with Tempest UREM40E's, only because they were all worn. It was in for the CI this week and in the process of reinstalling the plugs after a compression check I always check the resistance, even though these plugs were only 2 mos old and had only 35 hours on them. Three of them showed INFINITE resistance, checked with 2 different meters. I replaced all of them and am in contact with Tempest, who now has the plugs, and has promised to check them and get back to me.
I have another friend who was having a hard time hot-starting his Stearman. He bought 12 brand new UREM37BY Tempest plugs and one of them right out of the box showed INFINITE resistance.
So, for those of you having a hard time hot-starting, do check those plugs. Trust but verify.
Let's not start a thread on Tempest plugs having a problem until we get more data.
I performed over 12 hot starts after replacing the plugs, with no problems.
Vic
I have another friend who was having a hard time hot-starting his Stearman. He bought 12 brand new UREM37BY Tempest plugs and one of them right out of the box showed INFINITE resistance.
So, for those of you having a hard time hot-starting, do check those plugs. Trust but verify.
Let's not start a thread on Tempest plugs having a problem until we get more data.
I performed over 12 hot starts after replacing the plugs, with no problems.
Vic