danutt 4 Report post Posted October 14, 2012 Car is a stroker 2.7 m325i didnt have any issues but all a sudden takes about 10 seconds of crank to start No air leaks have checked thoroughly icv works fine tps is all good Got fuel got air air flow meter is good aswell Every now and then itl start in 1 second as if if nothing is wrong and most other times it takes ages Fuel relay good fuel pump etc all ok new spark plugs and dizzy and rotor all in working order and battery strong Mm could it be the crank sensor? Or perhaps cam sensor if it has one? Have replaced the blue coolant temp sensor because the brown one is just for the gauge When the car is warm its fine starts right up but if left to sit for about an hour it has the issue again But not as often as when its cold you havta pump the throttle Quote Share this post Link to post Share on other sites
BM WORLD 1258 Report post Posted October 14, 2012 could be a tied fuel pump , fuel return valve failing , fuel drains back then takes a while for teh fuel pressure to build back up?? what motronic set up is it . if its the early system could be the cold start injector leaking fuel into the manifold and flooding it or a faulty cold start injector timer switch (just unplug it) Quote Share this post Link to post Share on other sites
danutt 4 Report post Posted October 14, 2012 could be a tied fuel pump , fuel return valve failing , fuel drains back then takes a while for teh fuel pressure to build back up?? what motronic set up is it . if its the early system could be the cold start injector leaking fuel into the manifold and flooding it or a faulty cold start injector timer switch (just unplug it) No cold start injector... The fuel idea sounds plausable where are those things exactly and how to check them? Quote Share this post Link to post Share on other sites
