P1174 code BMW 1998 318i

Question

It seems the more I run smoke test to find the vacume leak the more of amont of smke comes out??but I can not find from where cause is tight area where the end corner of the valve cover and upper intake and the fuel injector meet it so many possibility there ..I took the upper intake off and I inspect nothing there it look some where under the lower intake is Gina be big job if I decide to take it off..but if I do how I am gonna run any test and every thing wide open to run a smoke test please I need help before taken that step and what could be leaking there despite the car run exsellent except I am losing fuel because of that leak..thanks in advance

Answer 1

If you already inspected the oil drainback valve as not the problem and the MAF boot as not the problem,pull the lower intake out, make the inspection from there,Heres the problem if the lower intake had a vacuum leak it will affect that one particular cylinder, Cover the lower intake opening with duct tape, do your smoke test and use a inspection mirror Also get a spray bottle fill with soapy solution and spray the area you suspect.