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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 02-23-2009, 07:04 AM   #1 (permalink)
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1994 BMW 325 surge problem

My 1994 325 has an internittent speed surge problem. At ~48-50 MPH, the RPMS/speed will surge up and down over about a 5MPH range.
Would appreciate any starting points to start looking for problem.


Any help is appreciated.

Thanks,

Jimw
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Old 02-23-2009, 07:43 AM   #2 (permalink)
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Give the throttle body a clean and your maf, your maf may also have failed
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Old 02-23-2009, 05:58 PM   #3 (permalink)
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Thanks! Will check for proper MAF voltage and also clean. Also, do you advocate taking to throttle body off to clean or is there something that be sprayed into the intake (or gas tank) while engine running?

Thanks,
Jim
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Old 02-23-2009, 07:39 PM   #4 (permalink)
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Thanks! Will check for proper MAF voltage and also clean. Also, do you advocate taking to throttle body off to clean or is there something that be sprayed into the intake (or gas tank) while engine running?

Thanks,
Jim
e36-tech.com | CLEANING YOUR Mass Air Flow Sensor DIY

or they do sell MAF cleaner in a spray can......
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Old 02-23-2009, 08:25 PM   #5 (permalink)
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If it is not the MAF, should you clean the Throttle Body? Can you clean this without removing the Throttle Body by spraying something (carb cleaner) into the intake?

Appreciate your input.

Jim
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Old 02-23-2009, 08:35 PM   #6 (permalink)
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If it is not the MAF, should you clean the Throttle Body? Can you clean this without removing the Throttle Body by spraying something (carb cleaner) into the intake?

Appreciate your input.

Jim
Yes you can......also check the intake boot for dry rotting & cracks...

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