boost issue

[ChezoGTR]

so for the past couple days ive been having a boost issue. i washed my engine bay the other day and ever since ive been boosting fine for a bit of driving but then after a while my car will only boost to the line right before +7 (stock boost gauge) and then i turn my car off and let it sit for a bit and it boost all the way up to +7 again and then back down to lets say +3.5. is there such thing as a boost limp mode or is my? or did i mess something up when i washed the engine bay and is now restricting my boost? its using both turbos even when its being restricted it just wont get to full boost. solenoid maybe?

[ChezoGTR]

bumping ( its really bugging me cant figure it out) any suggestions will do. i know its not a vaccume leak

[danwit]

Wastegate actuators sticking maybe? I dont think washing youre engine would be the cause because the issue is reoccuring sporatically. Its not in limp mode either. Limp mode restricts your rpm, not your boost.

[ChezoGTR]

but ill be in full boost and it will just drop to the the 3.5 mark while im in full boost.

[dickered32]

Sounds like a boost leak to me.

[DarkCaporaL]

I'd say either you have a leak (BOV starts leaking when it reaches a certain pressure, wastegates, etc.) or the ECU is pulling boost aka switching to boost knock maps if you're running the stock solenoid.

[import27]

actually i was informed that your boost solenoid actully can go to a limp mode i limit your boost so just by pass it. i went to can tire it was 2.99 for a box of three vaccum line connectors then just by pass it and see if that helps.

[ChezoGTR]

i washed my engine bay and after that i ran on 5 cylinders i guess because im missing one of the center plate screws and water must have gotten in. im thinking that threw a code and is putting my boost into limp mode. how do you by pass the solenoid

[Skym]

Don't bypass the boost control solenoid, fix the problem (find and replace faulty coilpack). If running on 5 cylinders, stock ECU is probably picking it up as knock (high knock count) and switching to knock maps (knock ignition map, knock fuel map, knock boost duty) to protect engine.

[DarkCaporaL]

What Skym said, if the ECU is limiting boost it's because it's detecting knock, you need to find out why, not bypass what controls your boost...