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Originally Posted by Lotus99
Bubbles, you having the Dinan already, are those A/F numbers normal? Any concerns or comments on them?
OP, pls. let us know what you hear back on that.
Enjoy it!
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Dinan runs rich but his AFRs are a bit off, it should stay around 11:1-12:1 in the high RPM range. His fuel pump may be failing which could explain the dip and strange AFRs.
OP are you experiencing MPG loss? A failing fuel pump does not atomize fuel correctly which reduces MPG and HP.