If the blue trace at the bottom is fuel (showing max of about 4 or 5 lb) it looks like its bouncing 2lb in 1st gear!.
Is you gauge liquid filled?.
Believe the transducer on the logger over a gauge anytime.
Get the AFR trace trough and we can look, i have spent hundreds of hours looking thousands of data logger 02 and EGT traces.
Normally my recommendation is to look at a min of 3x traces at any one time, ie rpm, acc, 02, and figure out what's going on, but when dealing with screenshot we need to nail down what's actually happening with your 02 with some readable data and scale reference.
As well as confirming data on fuel pressure.
Do you have jet extensions and a PV in the rear bowl?
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Working on going faster (and now staying dry at the same time !!)
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