Got engine running, but its running retardedly lean.

[kyle1911]

SOHC 1990 KA24E

Engine is not seeing boost read last line.

It idles fine but the AFR's from the O2 sensor are dead lean, there is no power under load.. I can't get above 2grand without worring about my HG.

What would you suggest to look for? It is setup as a blow through MAFS I will provide pictures tommorow.

All the emission garbage is removed, the only thing recieving a vacume now is the idle control and FPR.

It idles fine but the EGT's are damn hot, I infared scanned the runners on the manifold

1 - 65 degrees C2 - 753 - 1014 - 89

The "turbo" is at 215 degrees C after the engine is warm.

The engine is running NA currently because my turbo didn;t like my skills with a hydro press... it was modified and is now an elbow...

[navysnail]

those manifold temps arnt really that hot...

are you sure they A/F gauge isnt lying to you?

[kyle1911]

those manifold temps arnt really that hot...

are you sure they A/F gauge isnt lying to you?

That could also be true. But I would rather be safe then SOL and assume it is incorrect.

What else would cause the engine to idle strong, than struggle horribly trying to accellerate under load 2k + I can free rev it to which ever rpm I want.

Think not having the intake air temperature sensor connected would affect it?

[NISTECH]

The intake air temp has no effect on engine management. Use a volt meter and look at your O2 voltage does it also indicate lean [close to 0 volts]?

[kyle1911]

I thought that was the case.

I tried getting a voltage out of it by putting the ground on the head and the positive lead from the multimeter to the wire commig off the O2 sensor which I assumed would be the positive.

It is a new sensor that I just bought and it is about 4" back from the "turbo" in a 3" pipe with no back pressure at all (if that makes a difference)

Also I have the swirl valve controller and vacume source removed, I was under the impression that they didn;t a vacume source because they would stay paralle to the runners until the vacume source is applied.

[s13sr20chris]

move the swirl control system with your hand and try to drive(this may require creativity). i have seen a stuck swirl control valve or two cause a car to run out of breath at 1500 and up.

[kyle1911]

move the swirl control system with your hand and try to drive(this may require creativity). i have seen a stuck swirl control valve or two cause a car to run out of breath at 1500 and up.

I'll giev that a try and get back to ya.

[kyle1911]

Swirl valve didnt do much.. But I am throwing code 41 ?? which I do not know what it is

[NISTECH]

41 is intake air temp sensor [daig purposes only]

[kyle1911]

OK, I'll pug that in and see

[kyle1911]

replaced fuel pump(walbro now) ran codes and replaced my AIT sensor, resealed my vacume hoses now shes haulling *** NA