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Hello, im trying to get my van to pass smog! its failed now twice. ive cleaned the throttle body and egr valve, have new can n rottor also. Do you have any sujestions or know whats wrong? Thank You!!!
 

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87-89-90 03AWDx3
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Do a tuneup, check wires/plugs, I would also do a compression test if you are changing plugs.

Check your timing.

Do a seafoam treatment.
 
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