BMW M51 idle issues HELP !!!!

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Sasizza

New Member
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5
HELP NEEDED PLEASE
I have a 1998 p38 dse man M51 engine done 68k miles.... It has developed a fault that no one seems to know how to cure.... As you come to a halt and the revs drop as they should, it misfires until it comes to a complete stop then settles back to running on all 6 cyl....
It is not injectors and its had a new inj pump.... No fault codes are apparent when diagnosed at standstill and if diagnosed when driving have had fuel actuator ( in the inj pump which is now replaced ) and lift needle in inj 4 which governs the idle and is also new....
Has anyone had the same fault ??? Joe :((
 
HELP NEEDED PLEASE
I have a 1998 p38 dse man M51 engine done 68k miles.... It has developed a fault that no one seems to know how to cure.... As you come to a halt and the revs drop as they should, it misfires until it comes to a complete stop then settles back to running on all 6 cyl....
It is not injectors and its had a new inj pump.... No fault codes are apparent when diagnosed at standstill and if diagnosed when driving have had fuel actuator ( in the inj pump which is now replaced ) and lift needle in inj 4 which governs the idle and is also new....
Has anyone had the same fault ??? Joe :((

Number four injector does not govern the idle. That is controlled by the ECU when the idle control switch is engaged, via speed signals from the CPS and position changes by the ECU of the fuel quantity servo.
 
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