[GTATX]

Got this again today. Cars drives fine but rough idle. I can clear the code and lights goes away but side to side sway is back whenever this happens. Any advice?

[GTATX]

Tuner said it's more than likely spark plugs. Last time they were changed over 6k miles back.

[r33_RGSport]

Originally Posted by GTATX

Tuner said it's more than likely spark plugs. Last time they were changed over 6k miles back.

Running too lean or too rich will kill plugs prematurely.

[GTATX]

Originally Posted by r33_RGSport

Running too lean or too rich will kill plugs prematurely.

So I filled up 93 straight no e85 and cars running better no codes. I ran the gas all the way to below 0 before filling it up

[BMWM12045]

What mixture were you using for your e30? I typically use 15 gallons of 93 and 4 gallons of e85 pump (which according to a local facebook group is e77) The car seems to love it

The ethanol will help keep the engine safe in addition to the slight octane boost so don't add too much trying to boost the octane up

[GTATX]

Originally Posted by WFPC

What mixture were you using for your e30? I typically use 15 gallons of 93 and 4 gallons of e85 pump (which according to a local facebook group is e77) The car seems to love it

The ethanol will help keep the engine safe in addition to the slight octane boost so don't add too much trying to boost the octane up

I was doing 5 gals to rest 93 fill up. Couple of weeks back I have done close to 7 gals and think ecu just needs to relearn 93 straight first and then I might add 5 gals again after this 93 fill up ends.