Just installed my cleaned/flow tested evo 8 injectors. I have a hotwired walboro, AFPR, aem wideband and emanage with just corrections from 360-560's.

Cold idle afr's bounce all over (didnt do that with old injectors) and it eventually evens out to 14.6-14.8 after a few minutes. But after driving for a bit my afr at idle slowly creeps down to 11.9-12.2. I wouldnt think I would have to pull that much fuel at idle, do I?

And the other issue. At WOT afr is lower 12's until 5200rpm where it pegs rich, I dont have a problem with that, I can tune for that. But somewhere after 4500 to 7000 I get 4-6 counts of knock, at which point timing jumps from 30degrees to 20. So I cant tell the difference from 12psi to 17, is that timing killing me? And why is timing being pulled with such low knock?

Thanks for any help in advance.

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Matt
92 VR4

If it helps at all the idling thing is mainly when the car idles down to 700rpm, if I hold it at 1000rpm the afr is right where it should be.

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Matt
92 VR4

Obviously yes if the WB is calling for it.

The ECU is supposed to cycle the O2s at idle and cruise. You're going to find your AFR changing a bit because the ECU corrections for temp, pressure, and stock o2 sensor inaccuracies.



Waaay too much timing... Retard it a degree or two in that area.

Stock timing advance for that RPM range is lower 20s.

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06 Blue EVO 9

All afr listed were wideband readings. I know it didnt do that before the injectors, didnt think they jumped around either. Oh well guess thats not such a huge deal.

Ya I fudged the timing numbers. It will jump from 25 to 15. The timing is untouched and was the same before injectors or emanage. And the base timing was right on.

Edit, ah gotcha on the idle stuff. I misread what you said. So basically I need to find the tps difference from 700-1000 rpm. Thanks.

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Matt
92 VR4