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Ken..yeah, fmc said sometime ago..poor fuel can cause coking & use stanadyne perf./m.c additive or ? which may help. If tec. stated ONLY poor fuel can cause coking that would contradict..FMC TSB 06-4-12..which lists a BUNCH of things that can cause/contribute to coking. So..
For argument sake...poor fuel is responsible for coking = fmc not responsible, but gonna give you a break this time & fix under warr. Some use additive/some dont, I do. Maybe worthwhile if your getting fuel from many diff. place's. If same place all the time you need to ask about their fuel quality (cetane) etc. JMO! Good luck.
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03 F250 XLT SC/SB 4X4 6L (stock) A/T. SRW 3.73's BD:02/11/03. 01 TL 23' SGII
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