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I should note I am using 7/64 hose instead of 3mm. It is a tiny bit smaller. Would that matter?
More backpressure doesn't affect the mixture.It affects the EGR and modulator. More exhaust in the intake = less NOx.Look at the modulator and EGR and hoses in Snowtoy's post.When the bottom of the 'T' is closed, full available vacuum is applied to the EGR (if the BVSV is working correctly, BVSV is so EGR doesn't work when cold, you can bypass as smog test is for warm conditions)Backpressure at the bottom of the modulator and vacuum in the middle will close the bottom of the 'T'But (this is from memory) the middle chamber also has a controlled vacuum leak. So if there's low backpressure and not much vacuum the bottom of the 'T' is never (or rarely) closed. So you never get much vacuum to the EGR valve to open it up.Toyota designed the system for the stock exhaust and muffler. Any changes to the exhaust and you've messed up Toyota's calibration.The plate I made was just a educated guess and it worked................
The plate I made was just a educated guess and it worked................
So if the EGR is not working at idle (full vacuum), then the mixture goes lean?
If adding headers and open exhaust on a stock 22RE was causing a serious lean fire condition, wouldn't we know about before now?Were the injectors tested or refurbed? Like me, I assume you don't know or have not tested the fuel pressure?
Ugh, baffle in place and egr still doesn't want to make the car stumble.
So at this point, the controls don't actually matter because the valve itself is not putting exhaust into the system.
Or maybe a clog somewhere before the EGR.
Have you pulled the plugs, disconnected and reconnected the battery, or done a compression check?
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