[DocSolis]

I have 08 335i about 74000 mls. Got a Cobb tune catless dps and fmic. I noted that the car seems to sputter at cruising speeds. Started like month ago but happened rarely noticed this week it happening almost daily. I've had the tune for a while so not sure if it's attributing to the problem.I changed the coils and sp recently and also had an oil change. Plus I use 93 shell gas.also on wot it pulls fine no cel or ses ,problem just seems at cruising speeds. Wondering if any has had same experience or knowledge what it might be before I take it to the dealer. . Taking tune off today see if that does anything. Thanks.

[PKizzle]

Have noticed a similar problem in my stock 335is over the last few days. Trying to accelerate at lower speeds in a higher gear (30 in 4th, 40 in 5th etc.,) causes the car to sputter a bit. Taking it to the dealer to get checked out next week. Will update once I find out the cause.

[DocSolis]

Did yours do it when your car hadn't fully warmed up? I put gas from another shell station and seemed to have gone away ( knock on wood) ..maybe a bad batch of fuel.

[Simple5]

Mine does that sometimes too... since im an 07 and you are an 08 we probably need to do that walnut shell blasting of the valve intake...

[DocSolis]

Yea I was thinking it might also be that...or the dreaded hpfp. But I haven't gotten any long cranks or cel/ses associated with hpfp failure.