pyrometer weirdness and cold starting issue

[Pork_Chop50]

Have you tested the GP? That is another I've run into. The Beru/Motocraft's are, like many say, superior in quality. I put 8 new DieselRx GP's in and in two days they started to fail. The current set of Beru's are going on three years with not a single issue.

 

[SPR1NK]

i put 8 brand new beru/motorcraft plugs in it when the engine got swapped in