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with out that passage way in the manifold you will not get any gasses over to the EGR valve. I'm not sure what you mean by not working.
I've been thinking about your AFR issue and the position on the sensor might be a problem. They don't like turbulence. I'm planning on a blow threw setup also but it will be after the intercooler. I'm hoping that way it will smooth out the air and help with any pulsing that comes out of the compressor.
That is the way the 5vzfe goes with a supercharger. It runs at 14.7 (or the stock ECU is trying to anyway) in closed loop and in open loop you can tune to whatever fuel mixture you want.
Now I know these are two different engines and ECUs however they come from a similar generation of Toyota engineering, so I'm willing to bet the design principals are similar. I think the ECU is keeping you at the "optimal" AFR in closed loop i.e. 14.7.
If you want to be able to overcome this you'll need to get a piggyback. Contact Gadget at URD and he can advise you. I think the MAPECU2 could maybe do the trick of keeping you at whatever AFR you want. I wish APR made something like the X-1 for the old 1fz.
There is a tad of wiring to be done with the MAPECU2, but it gives you pretty good flexibility. Don't forget to bring your wallet!
Ok my question is if this manifold dosent have those passage way I will not get any gasses over the egr valve so the ecu will think the valve is all time open or close and makes the truck lean I don't know how the egr works but if this valve work together with the ecu to adjust the gasses I think that can be the reason my lc is lean or no?![]()
In the US you guys have a temperature sensor within the EGR valve set up. We don't in the UK so diconnecting the EGR is a breeze (mines been off for months and has just passed emissions testing easy)
There are threads on here about soldering a resistor to fool the EGR into thinking that the EGR is working correctly.
Try that mod? That should take the EGR issue out of the loop.
I can't think of any conditions where Toyota engineers would want to run beyond 14.7. Always richer than this, limp mode = run rich. Just like full throttle open loop = pour loads of petrol into that engine and let her go!
Too much petrol won't cause much damage (apart from at the pump)
With out the EGR you should get a code for insufficient flow. How this effects the AFR I don't know.
I've been doing some testing lately and I'll share those finding but they are from a NA truck. This is just my observations from several different MAF sensors at sea level.
Closed loop runs pretty much all the way up to about 17 lbs of air. During this time the AFR is constantly maintained around 14.7, it does fluctuate some.
After that we are in open loop and the AFR is consistently around 12.3
Now when we flow enough air for the calculated load to reach 99% we enter another "zone" and based on others posts in the past you should see an AFR around 8.6.
From what you have posted I think you have a fueling issue. The only reason you are not running lean during closed loop is because you are in closed loop and the ECU is compensating for the short comings.
One possibility is that the fuel pump relay is not triggering to the high side and you are not getting that additional flow out of the fuel pump that is needed during those high demand times.
I'd expect the system to run richer with the O2 sensor disconnected because the ECU will see that as a fault and default to limp mode which I understand is designed to be rich to safe guard the engine. So I don't think this is a valid test.
I would personally try and monitor the fuel rail pressure to make sure that is OK. On the older 3FEs the FPR is a known issue and they recommend replacing it with fueling issues. It's pretty much the same as ours and it's on my list of things to change before I even touch a match to my setup.
Nothing same ****
Landtank do you have thei information below? if so can you please give it to me?
ECU
RPM signal
Air Flow / Pressure Signal Input
Air Flow /Pressure signal output
Thank you
I'm not sure what you are asking for.
I'll get them for you tomorrow