Originally Posted by
joshua43214
As a follow up to Javier's post, I am 99% sure it is only rpm signal that is used to keep the fuel pump active. I think the only other criteria for fuel shut down is airbag deployment.
Not trying to inflame but some models use the oil pressure switch signal to switch the fuel pump on after the starter is disengaged. In the event of a roll over or the lack of oil in the sump shuts the engine down (common on GM cars).
FYI : The new BM models use the oil level sensor and will go into 1 of 3 limp home modes if he oil level drops to a predetermined level.
In the event of an accident they have a pyrotechnic device that seperates the positive battery lead at the battery triggered after the front curtain airbags deploy.
Last edited by Ausmpower; 05-31-2006 at 09:24 AM.
BMW parts professional
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E12 M535i (go the dogleg!)
E28 M535i (MMM M88!)
E34 535i M
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RX7 S-IV T04 (440 hp ATW)
RX7 S-I 13b bridge port
RX4 13b peripheral port