MAF Nightmare - can you help? - Alfa Romeo Forum
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Moaning MAF Nightmare - can you help?

Hi all,
I have a 156 that was revving too low whilst driving (when you dip the clutch)...and when it was in neutral and idling the revs would at times go up and down like a yo yo!
I changed a couple of spark plugs, and also changed the MAF sensor..... it has improved it a bit but it seems to show the same problems with the revs although not as bad but after 45 mins or so as driving the problems seems to go away
then on starting the next day it is back to square one! although again not as bad before the bits was changed
i have read somewhere that it can take up to 5 days for the MAF and ECU to speak to eachother properly, is this right?
I have tried disconnecting the battery for 45 mins and re setting the ecu, and also tried the re setting of the accelerator sensor by putting the ignition on for 90 mins, off for 90 mins and then turning car on to idle for 10 mins
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Did you get a genuine bosch maf or one of those cheapo after market ones, this could well be the issue........
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a not so expensive garage near you is AHMotorsports for everything Alfa ... Adie will be able to sort out your car ... although good luck getting it sorted yourself
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wasnt a bosche one. just ordered a genuine part....... see if that solves the issue. cheers
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Member car:

a very dirty car

Clean the throttle butterfly with carb cleaner and reset the ecu again.
It is usually enough to spray it liberally with carb cleaner and let it soak a bit. Really hard stuff can be removed with a *gentle* rub with a cotton bud.
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thanks for your help lads. much appreciated

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