i can also see from a year ago you got new injectors, did the stumbling start occuring recently?
Hi all I am trying to sort out a off Idle stumble on my 1994 525I M50 engine, Auto Trans. I have replaced coils , spark plugs, Oxy sensor, throttle position sensor, and intake temp sensor. up acceleration from a stop the engine stumbles and then it catches and takes off. any ideas on where to look from here?
Thanks pan
Thanks
Python1
1994 525i
i can also see from a year ago you got new injectors, did the stumbling start occuring recently?
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Perhaps the fabled 19lb injectors? I bet they are not the stock ones... and you do not have one of Mark D's chips right?Originally Posted by BillionPa
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08/88 535i e34 M30+miller MAF, 'stiens, tints & teeth!
Air flow meter?
Throttle position switch?
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By stumbling you mean the engines starts coughing or it just hesitates?
If just a hesitation, then it might be MAF.
1994 520i with M50 engine, manual transmission and air conditioner.
VIN: GG45422
No it has not it's been there the whole time. The injectors and Coils were my first attempt at solving the stumble.
Thanks
Python1
1994 525i
It is just a hesitation
Thanks
Python1
1994 525i
Just replaced the throttle position switch, intake air temp sensor, and the oxy sensor. new injectors and coils a year ago.
Thanks
Python1
1994 525i
Really? Did you confirm they sent you the BMW part... not the FOTE-D5B or other generic 'replacement' types? Five-O are the major source for those... part number is on the side of each injector; at the top. You sure the TPS switch is properly adjusted too; according to Bill Rs posts showing the correct BMW procedure from the TIS? Next step is to test the AFM output as you push the air flap open- is ti reading a consistent increase in resistance as you open the flap? This is a common cause of bad DME data. NickOriginally Posted by python1
Last edited by genphreak; 07-26-2006 at 12:36 AM.
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08/88 535i e34 M30+miller MAF, 'stiens, tints & teeth!