X5 starting problem
Discussion
My old ( 2003, E53) 3.0 Diesel X5 has served me well over the years and has a full service record. I had it serviced and MOT'd etc. about a month ago an asked for the starting problem to be resolved. The car was difficult to start at any time ie first thing in the morning or even if I stopped the engine at a garage only to fill it up with fuel. A squirt of 'easy start' into the air intake always did the trick and got it started. The battery has lots of power and the starter motor is giving plenty of torque.
The BMW service manager said he renewed the fuel filter in the service and the starting did improve for a while. The problem has now returned ,well maybe 50% of the time, but its a bit reluctant to catch 100% of the time. Has anyone resolved a similar fault? My next guess is a fuel injector or the injector pump, but it runs fine once its going, I presume its got to be something that happens only on the initial start up.
Any guidance is much appreciated.
Regards
Steve
The BMW service manager said he renewed the fuel filter in the service and the starting did improve for a while. The problem has now returned ,well maybe 50% of the time, but its a bit reluctant to catch 100% of the time. Has anyone resolved a similar fault? My next guess is a fuel injector or the injector pump, but it runs fine once its going, I presume its got to be something that happens only on the initial start up.
Any guidance is much appreciated.
Regards
Steve
Hello again
My 2003 BMW X5 E53 3.0 Diesel is very reluctant to start
I have just put in a new fuel pump relay ( light green) but this did not solve the problem. The engine cranks very well , but will not start,hot or cold 90% of the time. A squirt of 'easy start' has always done the trick, and once going the engine doesn't miss a beat. Does this rule out the fuel pump? Why is it called a PRE fuel pump? is there another mechanical pump that takes over when the engine is running? Its odd that this problem is only present when starting the car. Any thoughts?
My 2003 BMW X5 E53 3.0 Diesel is very reluctant to start
I have just put in a new fuel pump relay ( light green) but this did not solve the problem. The engine cranks very well , but will not start,hot or cold 90% of the time. A squirt of 'easy start' has always done the trick, and once going the engine doesn't miss a beat. Does this rule out the fuel pump? Why is it called a PRE fuel pump? is there another mechanical pump that takes over when the engine is running? Its odd that this problem is only present when starting the car. Any thoughts?
Hi, would faulty glow plugs or glow plug relay make it reluctant to start even when the engine is hot? I could drive for 100 miles ,stop for fuel and it will not start again when I get back in. (unless I use 'easy start')I thought the engine block would heat the diesel sufficient for it to spontaneously ignite when it is compressed, the glow plugs only needed when everything is cold.
Thanks Helix 402
Yes, thanks for your earlier post hence me changing the relay as that was relatively easy and only a few pounds. Where is the pre supply pump? The main electric fuel pump is a pain to get at if its the one in the fuel tank, access under the back seat and I don't have a gizmo to take the seal off anyway. My local agents want £135/hr plus £70 to run the diagnosis plus parts and all plus the dreaded VAT. so I estimate in the region of £800 for a new pump. The car is only worth about £4k so I would like to have a go at resolving it myself.
My Chinese Maxiscan OBDII reader cant talk to my BMW for some reason, though it works fine on other cars. But then windows going down on their own and then not going up is another story about X5 electrics.
Yes, thanks for your earlier post hence me changing the relay as that was relatively easy and only a few pounds. Where is the pre supply pump? The main electric fuel pump is a pain to get at if its the one in the fuel tank, access under the back seat and I don't have a gizmo to take the seal off anyway. My local agents want £135/hr plus £70 to run the diagnosis plus parts and all plus the dreaded VAT. so I estimate in the region of £800 for a new pump. The car is only worth about £4k so I would like to have a go at resolving it myself.
My Chinese Maxiscan OBDII reader cant talk to my BMW for some reason, though it works fine on other cars. But then windows going down on their own and then not going up is another story about X5 electrics.
Hi Please excuse my ignorance,. but " its under the floor" is a bit vague for me . Do you mean I gain access to remove the pump from under the car, is there an external floor pan I have to remove to see it or can I lift carpets inside and is there is a cover plate to remove. I can find a youtube vid for the removal of the pump in the tank but not a pre supply pump. I cant hear anything like a pump start inside the car or at the fuel filler cap, when I turn on the engine, so I think your diagnosis is correct as I understand it should run and hum for about 5 seconds. Looking at your photograph its an inline pump with a rubber collar so if you can point me where to look.
Thanks
Thanks
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