[Doctor X]

Please help!

B58
- 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 syphon 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=

[lens]

Your HPFP crashes above 5k RPM.

Since you're stock HPFP, it means you added too much ethanol for the HPFP to handle, hence the crashing and backfires.

You're going to have to siphon some fuel out and add in more 91 oct.

[Stopsign32v]

Originally Posted by chaungo

You're going to have to siphon some fuel out and add in more 91 oct.

OR

Just chill out and drive it normal until it is low enough to add more 91 octane.