[redfred18t]

Hey everyone

I have a 2007 335i with the vishnu procede v4 installed. The problem I'm having is that the car doesn't build boost, and at idle and normal cruising it is showing up on my rix boost gauge as -4 vacuum. The most boost that it built was like 0.2 psi or so. I wanted to drive w/ my laptop to see what the procede is telling me, but its snowing out so I'll pass on that for tonight lol. Anyways, there are no codes on the DME according to the procede software. I have gotten about two or three check engine lights in the past week, but they all went away upon restart. I dont recall if they were the "service engine soon" or half engine light. Also, I've noticed the light would flip on when it's cold and I haven't run the car for very long (take off after maybe a minute when it's sitting overnight for example). It always came on during normal driving.


It doesnt have anything else installed aside from a milltek catback, injen intake, and rixster boost guage. Everything else is stock and the car currently has 70k. It isn't beaten on, and I've gone to the track once.

Is this something anyone has run into before? Maybe a bad vac line or solenoid is causing this? The car is out of warranty so bringing it to the dealer to pay out the nose to fix this is out of the question.

Any suggestions are much appreciated!

[Wedge1967]

You have it in map 3. hold the cruz stick down until hit map 1 and see if that fixes the issue. If you're running meth, hold it up until you hit map 4. If you're not sure what I'm talking about, call and talk with Robert tomorrow.

[redfred18t]

I switched maps when I was in my garage earlier and it didn't change anything. Also, I think I have only 2 maps + valet. I'm always in map 1.

[redfred18t]

turned out to be a disconnected vac hose lol

[lpphreakx06]

Yup, thats always a PITA, feels like a n52 ehe

[Tzu]

Where was it disconnected? At the accumulator or servo area?

[redfred18t]

disconnected by the diverter valves