Will the diaphragm in my 87 6.9 hold up to long term bio-d use? I've been thinking of changing to an electric pump. I mostly run svo. Would I have to use two electric pumps or could I use one pump for bio-d and the lift pump for the svo? Would the lift pump be damaged while I was running the bio on electric and the lift pump was still pumping without fuel flow out.
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