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Thread: OVERBOOST HELP

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    OVERBOOST HELP

    At high boost getting an overboost, car hesitates until it goes into limp mode , I'm pretty sure it's a vacuum leak, checked both bov and stock diverter valves looks OK to me, but happens with both sometime after 11 psi , is there anyway to do a vacuum leak test in the shop ? besides just looking at the hoses ? Maybe it's my wastegate actuators ? How can I check ? This drives me $#@!ing crazy !!!!! :mad0259::confused2Click here to enlarge tried IT WITH NEW OLD AND EVEN OLDER MAPS so I doubt the tune is causing it

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    post full mods and what you did last and when

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    fmic, dps, mufflers, cp-bov , intakes , meth - tank is off ( for the past 6 months ) , occ, procede , cp - bov was the last thing I did , thought it was the problem, took it off and put stock cp with dv's and same thing , I'm thinkng maybe the O ring needs to be changed on the throttle body connections ?

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    bump for help

    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
    : http://www.boostaddict.com/showthrea...r-kit-for-sale

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    you need to do leak test . What settings are you running ? try to post a screen shot of the user adjustable parameters and the codes you are getting.
    07 335i AT - MOTIV 750 - MHD BMS E85 - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
    Click here to enlarge

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    are you sure you connected everything properly? snap some pics just be sure of the easy stuff

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    lol there's more

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    What is your boost gauge saying? any logs? Would definitely help.

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    is it overboost or underboost codes? are you on JB4?

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    If you had a vacuum leak you would be getting under boost codes for failure to achieve target. Over boost codes I would remove the tune and drive it...you might have a stuck closed waste gate.

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    if on JB4 and overboost, he may have FF max set too high..? maybe? i dunno.. do what Matt says

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    Click here to enlarge Originally Posted by n54BoostOnCoke Click here to enlarge
    fmic, dps, mufflers, cp-bov , intakes , meth - tank is off ( for the past 6 months ) , occ, procede , cp - bov was the last thing I did , thought it was the problem, took it off and put stock cp with dv's and same thing , I'm thinkng maybe the O ring needs to be changed on the throttle body connections ?
    His list of mods say procede...
    There are two theories to arguing with women. Neither one works

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    sorry, i cant read. I wish him all the best. at least its not a misfire Click here to enlarge

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    It was the wastegate, but I might of had 2 problems, wastegates and the boost leak, because since I've removed the procede I got the under boost code, could that code be for wastegates as well ? if let's say they open and don't close all the way or something ? or boost leak only can cause that code ? Thanks ( I've reused the same o-ring like 5 times on the charge pipe so I've ordered a new one from BMW just in case, DIC maps on procede were causing the problem with my wastegates, however on the previous maps it didn't happen, but I might of abused my wastegates that I need new ones now IDK !!!

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    Click here to enlarge Originally Posted by n54BoostOnCoke Click here to enlarge
    It was the wastegate, but I might of had 2 problems, wastegates and the boost leak, because since I've removed the procede I got the under boost code, could that code be for wastegates as well ? if let's say they open and don't close all the way or something ? or boost leak only can cause that code ? Thanks ( I've reused the same o-ring like 5 times on the charge pipe so I've ordered a new one from BMW just in case, DIC maps on procede were causing the problem with my wastegates, however on the previous maps it didn't happen, but I might of abused my wastegates that I need new ones now IDK !!!
    you might have a wastegate not closing . This has happened to a friend of mine , underboost codes, both turbos replaced.
    07 335i AT - MOTIV 750 - MHD BMS E85 - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
    Click here to enlarge

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    DAMN IT !!! anyone else here has something to say ?

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    Is there a check valve on your meth kit? Is the line still connected might be leaking from there
    JB4LIFE

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