air mass meter

hello all and help please have been having a few problems with my 1999 vr5 passat at low speeds the car has been very juddery not all the time but enough to annoy my.so changed the air mass meter and the car run even worse so changed it back with the original and now the car has gone even worse when i start it when cold it starts then drops revs and cuts out then start it again and have to really rev it to get anywhere no power at all but then after a few minutes it picks again but still feels sluggish so have sent the senser back for a replacement and waiting for a new one back to see if this one seems to work .also have been hearing about limp mode will my car ecu need to be reset with this problem thanks

Try disconnecting the battery for an hour before and while you change them, then when you have done the MAF swap, re-connect the battery and start the car and let it idle for a few minutes, it chould clear the fault be OK.

Get it on VAG-COM to have the fault codes read. If the problem is getting worse and you've tried 2 different MAFs, it could be something else entirely.

Cam/Crank sensor or coolant temp sensor possibly. If you're near North London, PM me and you can come down and we'll hook it up to VAG-Com.

Where did you buy the AMM from?

yes mate told me to disconnect the battery but had already sent the unit back thinking it is faulty hopefully should get another back soon enough,also the car sometimes just keeps firing but will not start the engine note sound totally different and can do it for about 10 mins trying to start it but then it starts could that be the air mass senser aswell bloke i know had it on the computer and the only fault that came up was engine idle senser i think and the air mass

ok so i recieved my airmass meter put it in and disconnected the power for 30 mins and starts the car and it stalls starts it again and stalls does it a few times and then it runs ok.the new sensor seems to have solved the low power faults but when you push the accelerator to the floor quick the engine seems to drop revs then kick in,the stalling only happens when the car has not been run for about 4,5 hours it dont really want to go to the dealer coz i know there gonna spank my **** any suggestions many thanks:1zhelp::1zhelp::1zhelp::1zhelp:

You can get the codes read and cleared at just about any garage for about £25.

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Originally Posted by Crasher

You can get the codes read and cleared at just about any garage for about £25.

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bloke who worked used to work for vw plugged it in a not so long back he said that it was the AMM and the charcoal something and that was it.

So now you have fitted a new AMM you need to get them re-read, printed and cleared. Then drive the car again for a week or two and have them read again. What comes back (as long as you don’t disconnect anything with the ignition on) can be trusted as a good code and you can take it from, there.

Quote:

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Originally Posted by Crasher

So now you have fitted a new AMM you need to get them re-read, printed and cleared. Then drive the car again for a week or two and have them read again. What comes back (as long as you don’t disconnect anything with the ignition on) can be trusted as a good code and you can take it from, there.

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ok will get my mate to clear them thanks