Grundysp Posted Friday at 12:43 PM Share Posted Friday at 12:43 PM Last night I replaced the head gasket on my R52 Cooper S. The engine started up without a hitch, however it went into overdrive almost instantly (I neglected to check the engine rev limit). From what I can tell, it could be vacuum lines or low voltage levels; however, I have not been able to locate this specific issue on the forum; could you perhaps point me in the direction of a good starting point? Link to comment Share on other sites More sharing options...
Dudeta Posted Friday at 12:44 PM Share Posted Friday at 12:44 PM If you suspect a leak, whether it's from the intake, exhaust, or supercharger side, I recommend performing a smoke test and fixing any damaged components. To find out what's going on, check the real-time data, which may include things like temperatures, throttle positions, fuel trims, and more. Link to comment Share on other sites More sharing options...
Grundysp Posted Friday at 12:44 PM Author Share Posted Friday at 12:44 PM I see. Is it possible that it can take in air too easily? It will be interesting to see what the code reader shows, which I borrowed today. Link to comment Share on other sites More sharing options...
Dudeta Posted Friday at 12:44 PM Share Posted Friday at 12:44 PM Great job! Please inform us of your findings so that we can guide you. Link to comment Share on other sites More sharing options...
Grundysp Posted Friday at 12:45 PM Author Share Posted Friday at 12:45 PM It seems like the engine is going straight onto boost, and I'm worried the bypass valve is stuck closed. The hoover connection might have been knocked off, so I should go see. It seems to be in line with it since I also received identical problem codes. Is it feasible to you? Link to comment Share on other sites More sharing options...
Dudeta Posted Friday at 12:45 PM Share Posted Friday at 12:45 PM Unexpectedly high or low readings outside of the sensor's parameters are definitely the result of something. I will have to look into what you suggest, but I don't know the system well enough to give it a specific name. However, please inform us of the results of the checks. Link to comment Share on other sites More sharing options...
Accomis Posted Friday at 12:46 PM Share Posted Friday at 12:46 PM have air leaks Verify that the small black pipe connects to the supercharger horn; the end with the rubber cap has separated. same as before, smoulder it Link to comment Share on other sites More sharing options...
Grundysp Posted Friday at 12:46 PM Author Share Posted Friday at 12:46 PM Is that the short line that I've drawn here connecting the bypass valve's vacuum actuator to the horn side of the valve? Link to comment Share on other sites More sharing options...
Accomis Posted Friday at 12:46 PM Share Posted Friday at 12:46 PM Additionally, smoke testing will undoubtedly reveal whether the throttle body area, brake boost, and crankcase breather pipe snap off. Link to comment Share on other sites More sharing options...
Grundysp Posted Friday at 12:47 PM Author Share Posted Friday at 12:47 PM Link to comment Share on other sites More sharing options...
Accomis Posted 1 hour ago Share Posted 1 hour ago Link to comment Share on other sites More sharing options...
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