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ok i have a 98 at 2.0 no CEL when i start the car it idles fine. when i tap the gas it shuts off. when i put it in gear it starts shaking and "drops off" recently replaced the MAF.
 

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5/23/10 <3
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11,417 Posts
Have you scanned for codes? There might not be a CEL, but there could still be codes stored.
 

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Why did you replace the MAF to being with? What brand and part # was the MAF? Poor quality; aftermarket MAFs have caused allot of people problems! It is best to purchase a OEM BOSCH maf; they are the original equipment from Volkswagen and perform, as they should.

You can look up the correct Bosch parts for your car here:

https://www.boschautoparts.com/auto

You can also; test the MAF with a multimeter or a scan tool with live data.

4 wire:
Part 1 -Testing the VW Passat (98-99) Mass Air Flow (MAF) Sensor
5 wire:
Part 1 -VW Mass Air Flow (MAF) Sensor Test (5 Wire Type)

If you still have the original maf; put that back on and see if the problem, goes away.
 

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Everett Street in May
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3,212 Posts
Yep, scan for manufacture codes and do what Bill said, put the old MAF back in and see if the problem goes away. I would probably just start with the MAF swap first.

If you pull any codes, please post them up.
 
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