runs rough when first starts like missing
BMW Q&AAsk Your Question
1990 BMW 750iL Question: rough idel first start also misfire
Answer #1Chow June 08, 2010, 03:05Master
Rough running could be due perished breather hoses in the back of the engine, perished intake manifold gasket or some other vacuum leak
Is the car misfiring constantly? what type of fuel do you use? is it from a reputable source? remove coil covers and check coils and plug condition, common for the rocker cover gasket to leak and the coil/plug valley fill with oil causing a misfire.