[BigBody5er]

Hello i have a 2011 535i and I'm desperate for answers. Ever since installing my JB4 back in October my car has been getting progressively worse. The JB4 was my final install of my list of mods. When I got my car, it ran great and I only ran map 2. Nothing major until November ish when I pumped 3 gallons of E85 and ran map 5. The car was faster, but when I turned it off and turn it back on it would turn over and die. After a few tries it would run just fine. So I figured well no more E85 for me since I didn't have a proper tune anyway. 2 weeks later the car started a rough idle and would randomly die like it did with the E85. Concerned I took it to my machanic and he told me I had a boost leak by the CP and he fixed it. The car ran great, but 3 days later it rough idle and died at a red light. I travel for work so I don't drive the car much. However everytime I get the supposed boost leak fix it goes back to the same issue. I'd be stopped at a light and the car act like it wants to take off with my foot on the brake or just die. Also when I'm WOT the car jerks two out of three times. Fed up I removed the JB4 3 weeks ago and the car was fine for about 12 days. Now it's back to doing the same things. I've searched the forums and haven't found any answers. If you can help me or point me the right direction that'll help too. Attached are pictures and mods/ replaced parts. P.S. my car is not X Drive. I heard about the transfer case issue.

Mods: JB4, Evo Racing CP & DP, BMS intake, Fuel it LPFP 450 Walboro, Speedmotor FMIC.

Replaced: Valve cover, Coil packs, plugs, valvetronic, starter, alternator, battery, timing belt, lastly walnut blasted. Everything professionally done.

[ziekxq]

I would check and make sure hpfp is not going out.

[95blkmax]

Bigbody (btw car looks great!), you said it was all professionally done but nowhere in your description did you mention what codes the car was showing. Was this just forgotten or did they not check for codes??

[BigBody5er]

Ziekxq I thought about that. I think I'm a take the car to BMW first. I'm not seeing codes for the HPFP. 95Blkmax sorry I forgot to post the codes I'm getting. I took several screenshots and I'm a post them. let me know if you or anyone else need more info.

[BigBody5er]

Originally Posted by BigBody5er

Ziekxq I thought about that. I think I'm a take the car to BMW first. I'm not seeing codes for the HPFP. 95Blkmax sorry I forgot to post the codes I'm getting. I took several screenshots and I'm a post them. let me know if you or anyone else need more info.

let me know if you can't see my screenshots. Also some of the codes like sensor codes are from me tinkering with the JB4.

[95blkmax]

hey any update on this? screenshots never came up