Author Topic: Emissions fail, advice?  (Read 19988 times)

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andykrow

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Re: Emissions fail, advice?
« Reply #30 on: May 10, 2017, 11:42:51 AM »
Back when I teed off the line going from modulator to the valve and check the vacuum, it passed according to the fsm. This is the check to see if the system is applying vacuum to the valve when it should.

The issue is the valve. When applying vacuum directly to it, (bypassing the cars EGR control system,) the engine should run really rough or die. It does not do this. So at this point, the controls don't actually matter because the valve itself is not putting exhaust into the system.
85 4runner, 22re, 5spd, Ultimate crawler, Alcan lift that is too high, 35s, ARBs.

 
 
 
 
 

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