Quote:
Originally Posted by Joshinator99
If your low side drops off, it will then let the high side drop off. When the HPFP cannot keep up, it loses it big time! The rail pressure will simply fall off a cliff…. What was your low side holding at? What did your IPW look like? E55 seems like a lot for a stock fuel system LT4.
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That's what I was thinking too. I think he's trying to run too much ethanol and the fuel system can't keep up.