[Doctor X]

Please help!

Car: 540i
- BMS Intake
- VRSF Downpipes
- Stage 2 E30 bootmod3

Like the inpatient idiot I am I filled it e30 without measuring the ethanol content in either my e85 or my 91 (california) octane. I'm so dumb because I have my ethanol measuring cylinder coming in tomorrow but I for some illogical reason found it necessary to completely fill up blindly tonight...

At an empty tank I put in 5.8 gallons of e85 and 13 gallons of 91 octane.

After flashing the car I drove it around for a few miles before doing any pulls.

After the first pull at around 5k RPM I felt the kind of stutter/bog/misfire and it would let out a big backfire.

I datalogged the car and will provide datalogs of the pulls from 91 octane as well as e30 mix.

I asked around and from what people have said so far I might be running too much ethanol? So the car is having a fuel cut which is causing all my problems.

This or my spark plugs are bad. Mind you the car is at 42k miles and I don't know when the last time the sparkplugs have been replaced.

If I'm running too much E-85 should i siphon it out? Or should I just drive it as calm and mellow as possible below 3k rpms until the tank runs out.

Please someone guide me in the right direction and help me.

E30 Datalog #1:
https://datazap.me/u/doctorx/e30-data-log?log=0&data=

91 Datalog #1:
https://datazap.me/u/doctorx/91-datalog-1?log=0&data=

91 Datalog #2:
https://datazap.me/u/doctorx/91-datalog-2?log=0&data=