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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 07-04-2005, 11:46 PM   #1 (permalink)
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Hey can someone please help me...I just change my water pump on my 91, 525i and put everything back exactly how I took it off......Now when I went to start it, it starts but wont Idol and then it starts backfiring, if I Gas it. What could I have done wrong ...please help any solutions welcome ...thankyou
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Old 07-05-2005, 12:14 PM   #2 (permalink)
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sp0rky is an unknown quantity at this point
Do you have the m50 or m20 engine?
If you have the m20, did you mess with the timing belt at all? Check the timing and reset it if it's off.

And as for the crank position sensor, did that get tweeked at all?
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Old 07-05-2005, 09:59 PM   #3 (permalink)
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Quote:
Originally posted by sp0rky@Jul 6 2005, 06:14 AM
Do you have the m50 or m20 engine?
If you have the m20, did you mess with the timing belt at all? Check the timing and reset it if it's off.

And as for the crank position sensor, did that get tweeked at all?
[snapback]359746[/snapback]
How can I tell if it is a m50 or m20 engine? And also where is the crank position sensor situated? I dont think I messed with the timing belt unless it is the bigger belt of the 2..... Thanks for youe help
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Old 07-06-2005, 12:16 AM   #4 (permalink)
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sp0rky is an unknown quantity at this point
Bigger belt of the two tells me you most likely have the m50 engine in which case you don't even have a timing belt. Thats chain driven.

Here is the m20 engine:


and below is the m50 engine:


http://www.bmwe34.net/e34main/Maintenance/...e/M20Timing.asp
That link has some info on the crank position sensor.
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