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Oh boy!!!!!!!!! this turbo is making me feel stupid :( i have owned just hondas turbo cars never a turbo toyota but i will keep working on this!! i know i can do it lol.

i think i found a problem please let me know if im wrong. i remember when i installed the turbo manifold i noticed that manifold dosent have the egr port, gap or whatever is called. so i think that it is the reason that egr valve never opens. when i go full Throttle is good 11.8af but not when im cruising or half Throttle, the AF is 14.7 all the time even if im pushing 3psi or more, so i need to go full throttle to have a good AF.

So my question is that port or gap can be the reason of my problem? Thanks guys
 
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!
 
landtank said:
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.
Click to expand...


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? :confused:


here is the new video
http://www.youtube.com/watch?v=bk20NOmBtT0
 
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pr0ject42 said:
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!
Click to expand...

well i may buy the smt6 :frown:
http://www.youtube.com/watch?v=bk20NOmBtT0
 
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TRDCRUISER95 said:
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? :confused:
Click to expand...

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.
 
The Lovely Boyo said:
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;))
Click to expand...

So if I don't make the port to my turbo manifold my truck will be safe no damage right? So I can just ingnored it ?
 
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2
landtank said:
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.
Click to expand...

Thanks landtank to keep posting ideas!
Now I did installed a new 255 fuel pump and keeps doing the same *****. now let me tell you something. I think we have some people here that they are wrong just because they go full trouttle is rich dosent means is rich all the time. remember u are going to use the truck on hills, freeway, offroad and not all the time you will be at full trouttle! YES full trouttle is perfect but when you push the gas slow the ecu or maf or whatever control the gas dosent respond. the af stays allway the same and that is because the ecu calibrates the af with the 02sensor and I can tell u this because I did DISCONECT the 02sensor and now this ***** is runing perfect 13.8 cruising no boost. At 2psi 12.3 --- 4psi 11.9 5.5psi 11.4 and yes I have drove this truck for about 75 miles after I disconected now I installed the o2sensor back and erase the codes and what you think happends? now is lean againg! :hhmm: what u think mi amigo?
 
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.
 
I recived my fuel presure gauge today so I may install it tonight will see.
I was thinking the samething bad fuel pressure regulator that is why I ordered the fuel presure gauge thanks landthank!:cheers:
 
landtank said:
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.
Click to expand...

Nothing same **** :crybaby:


Landtank do you have thei information below? if so can you please give it to me?


RPM signal
Air Flow signal


Thank you
 
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