BMW Questions? Ask a BMW Repair Expert for Answers.
Hi Brian, my name is*****'ve looked over some of your previous questions. It appears as though you have measured the fuel pressure and have 50 psi. It also looks like you have tested for spark and have verified that you are not getting spark to any of the spark plugs. If your tests are correct I would check to see if you are getting 12V to the ignition coils with the key on. If you have 12V to the coils I would suggest replacing the crankshaft position sensor. Ideally you should have a factory level scan tool to check for fault codes and to check for drive authorization. If the EWS system has a fault you will have a crank/no start condition. EWS is your vehicle immobilizer.
Hi Brian, it would have been good if the dealer at least got the car started while it was there. At this point you will need to get the starter replaced and install new plugs and see if it will fire. The EWS can lose it's alignment due to a dead battery. There is nothing you can do to prevent this other than not allowing the battery to get low. I would not crank it very long after you get the starter replaced. If it does not start up immediately there is still something not right. Going back to what you said about having 50 psi fuel pressure and good spark I would have to suspect that the EWS may have been the problem but everything is not adding up at the moment. You are dealing with a couple of different issues with the lack of cranking and the no start. Let's get the motor cranking again then go from there.
Let me know how you make out. I am not around much on Sunday so it may take me awhile to reply.
Not necessarily. It rarely happens. At this point you don't even know if it needed to be aligned since the dealer never started the car.
An EWS fault would disable both spark and fuel injector pulse. You said it was flooded and if that is correct it would not be an EWS fault. If you have both spark and fuel and it's flooding when trying to start I would suspect either low battery voltage or a faulty mass air flow sensor. Flooding is very unusual on this model.
With an EWS fault you would have fuel pressure but you would not have spark or injector pulse. The low voltage when cranking could have put the EWS out of alignment. See if it will start with the new starter and a fully charged battery.
Let me know how it goes.
Hi, sorry for the wait I was away this evening. Yes it is very possible that the fuel has washed the cylinders and you have lost compression. A compression test would be a good idea but you could also squirt about 5-6 squirts of oil into each cylinder then install the plugs and see if it will fire.
I doubt any fuel additive harmed anything. Are you sure there is fuel in the tank? It's hard to imagine what might have happened. I'm assuming that you had a perfectly good running engine until you replaced the spark plugs, is that correct?
A teaspoon of oil won't do much if the cylinders are washed with fuel. If you can run a compression test that would be best. You could also remove fuse 47 for the fuel pump and just use a little ether in the air intake to see if it will fire. You need a helper to crank the motor while you spray a little ether to see if you can keep it running on the ether for a little while. If you get it running you can replace the fuse and see if it will run on it's own.
Yes, if the compression is gone due to fuel washing you should squirt about 5-6 squirts of oil into each cylinder then install the plugs and turn it over. I'd also pull the fuel pump fuse before you crank it. After you crank it a few times you can install the fuse and see if it will fire. Is the fuel filter new now?
I put the oil into a squirt can and shoot it in that way. I doubt that your fuel filter is plugged.
Doesn't make any sense that it keeps flooding. You can remove the fuel pump fuse to keep it from flooding while you are cranking the motor while using ether to see if it will fire.