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Matt
Matt, Engineer
Category: BMW
Satisfied Customers: 20576
Experience:  Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing
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I have a 2008 bmw 328xi coupe with no power it starts but

Customer Question

Hi I have a 2008 bmw 328xi coupe with no power it starts but rpm's don't go above 2000
Submitted: 12 months ago.
Category: BMW
Expert:  Matt replied 12 months ago.

Hello

I'm assuming that there's no engine fault / check engine light on so in which case I'd say that this sounds like a lack of fuel and could be a lack of fuel pressure from the electrical pump at the tank.

If the connections to the pump are corroded or damaged then the pump could stop at any time or could not be running at full speed. Check that its relay switches in and out and the relay contacts are clean and bright – replace the relay if in any doubt and do the same for the fuse,

Ideally measure the pressure at the injectors and if this is low check the pump as described and also consider changing the fuel filter as if this partially blocked this too will reduce pressure.

Customer: replied 12 months ago.
I have 2 codes 1030 and 1056 the engine light is on yellow when I start the car it runs fine just no power
Customer: replied 12 months ago.
I also unplugged the oil pressure switch by the oil filter and the car ran fine for about a week I replaced the switch and now getting the same thing is happening
Expert:  Matt replied 12 months ago.

Hello

thanks for the extra information

P1030 BMW - Valvetronics Monitoring Sluggish Movement, so this would result in the inlet valves not being lifted off their seat and so choking the engine as with the valve tronic system the regular throttle is only usd to regulate inlet manifold vacuum

This can be cause by a wiring fault to the Valvetronic Motor or perhaps a failed motor itself.

The first step would be to remove the beauty cover on the top of the engine and inspect the wiring

If you don't find a wiring fault and want to replace the motor, here's a walkthrough to get you through it:

http://www.pelicanparts.com/BMW/techarticles/BMW-3-Series-E90/FUEL-Valvetronic_Motor_Replacing/FUEL-Valvetronic_Motor_Replacing.htm

Customer: replied 12 months ago.
sorry I have replaced that motor to
Expert:  Matt replied 12 months ago.

Hello

Ok in that case check the connection to the motor and both cam sensors and it would also be worth checking that the high power wiring to the motor in is good condition with no corroded connections and stiff sections of wire , if you find any of these then replace the wiring

Expert:  Matt replied 11 months ago.

Hi

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