I work on motorcycle engines for a living (KTM, Ducati, MV Agusta, Husabergs) and they are all work in the 6 to 8 inches of mercury range, I shall measure the manifold vac tomorrow and tell you what readings I get from this M52. I had vacuum gages, does anyone know a reference vacuum value for the M52 engine to crosscheck against. solenoid assembly adjustment with air conditioning 600 rpm in drive (my car did not have a/c) fast idle speed 1600rpm in P or N. It had crossed my mind the fact the the absence of cat converter has lowers the exhaust backpressure to the point where is affecting the manifold vacuum. If you have difficulty reading the picture, Auto transmission 305 with EGR EFE Canadian Cert. On the other hand as mentioned above the muffler butterfly is opening after 3600 -4000rmps, the RB manual calls for 2600 rpms, CCVV is clean and disabling the muffler butterfly does not alter the idle speed (hose plugged during the test of course). To all, If you don't mind, I take the opportunity to add extra data to see what you think this is a 328i EU version, which means that it does not have oxygen sensor and the previous owner removed the cat converters:spank:, they are not require by law down here. I am getting this M52 ready to take it for a final scan at the official BMW Dealer, I want them to fix only the things that are outside of my reach, CO%, fuel Trim, diagnose of the sensors, etc. I want to take this opportunity to thanks all of you for your interested in my thread.:thumbup:īTW, All this questions come about from the fact that I had never worked on a BMW, This results in a relative air density (RAD) of (89-92) %:typing: Yep Miles_Trail, the 325i/M50/1992/manual Trany, was located at the same location, CARACAS, Venezuela.Īmbient temperature: 28 degree centigrade.
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