1984 VW GTi Rabbit Failed Smog

Hi

I am the original poster.

I forgot to add that this year / make does not have a EGR valve!

Thanks James

Remove the cat and see if it's all there. In my state CO2 must be above 6% so don't worry there.

More info. Did you belt it at peak revs in 2nd gear, 3rd and top on a good road for two minutes in each gear to blow out the exhausts. Did you disconnect the two hoses from the fuel filter, and run thru, 0.5 litre of injector cleaner (with some diesel) until it is used up? And pump the other

I guess not. Try it

If that fails again, and if the Bosch Injection Pump is mechanical (almost certain) back off the full throttle stop, and the screw that limits the fuel delivery volume. Back off the first by 3 quarters of a turn max, and the second by about one half a turn. Turn each back after it passes.

Or ship it over to me in the UK, and I might find time to do it.

Buy the two Bosch booklets on the rotary VE diesel Injection pump

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The 1984 Rabbit GTI was NOT a diesel engine ... no injection pump, just an electric fuel pump back by the fuel tank. It uses the CIS lambda injection system.

My guess ... either the Cat is gone or the O2 sensor needs to be replaced.

HI

Thanks for the reply.

I think you misunderstood. THe car is gas not diesel.

Thanks James

It's too lean. If it's cis you can adjust the mixture in the fuel distr. (3mm allen ) Turning it clockwise will make it rich. Be carefull it's very sensitive, start with a 1/4 turn.

SFC

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The present CO is .75% and the max is .91% and in my opinion a 1/4 turn will cause the CO to exceed the max limit.