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fluctuating idle/power loss in upper range


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Hi All,

2001 Boxster 2.7l 72k miles

After doing some research on the forums here, I decided to clean the MAF - it was pretty dirty, metal (sensor?) parts covered in a fine layer of dust ...

Anyway, after cleaning with electrical contact cleaner it looked much better so I re-installed and disconnected the battery for 10mins to reset the DME.

Now, the car drives noticibly better at low revs (starts quicker, smoother acceleration, idles better and stays between 600 - 800rpm)

However, there is still a problem between 4000-5000rpm:

- if I apply throttle (3rd gear) evenly (gradually) then car will accelerate normally to the redline, in fact performance is better than before I cleaned the MAF

- if I apply throttle aggressively (3rd gear) from say 2500rpm then car pulls but torque falls off noticibly around 4000rpm and engine 'spins' towards redline, I have to quickly change to 4th gear and torque is available again at the lower rev range ...

So ... I am wondering what to try next .. should I go after the throttle body (has never been cleaned) or do these symptoms indicate a failing MAF which needs to be replaced with a new unit (btw the current MAF part no 986 606 125 01)

Any help or advice re my next troubleshooting steps would be much appreciated! :)

(p.s. CEL has not come on at all before or after I started looking into this problem)



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  • 1 month later...

When you find it

email the part # to me if it is different than

Sometimes sold as B3130-149265

quote name='mik' date='Oct 16 2008, 02:02 PM' post='120098']

hi wvicary, yep - that's what I'm thinking at this stage ...

anyone have the Bosch equivalent part number for 986.606.125.01?

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