Running too rich

[DSM's 4 life]

I just rebuilt my car here is a list of my modifications

20g Turbocharger
Stage 1 comp camshafts

Fuel lab air fuel pressure regulator set at 42psi
bosh 44 fuel pump
FIC 550cc Injectors

3'' GM Mass air flow
mass air flow transistor: set to 3.5'' on transistor runs a lot better not sure why?

Evap removed
EGR Blocked off

I already adjusted my tps sensor and I am not sure what to set the second knob on my transistor at for my idle, Do I just turn down my pressure it seems like it is spitting fuel out of my cat back...

 

[92AWDHX40]

No wide band?

 

[DSM's 4 life]

Nope
Does Dsm link have one?

I know that short bands are not good but I had one laying around from when I bought the car I followed the vfaq and hooked it up I seem to be not getting power when it is switched to start here is a video showing whats going on.

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[steve]

I'm not sure what the question is here.

Set your translator according to it's manual for a stock setup and leave it along or get rid of it and go back to a stock MAF until you've sorted the car. You want to use DSMLink to tune with.

I suggest doing some research on how a narrowband O2 sensor works, it's normal for it not to do much until it comes up to operating temps. That's what the heater is there for, to speed up it coming to operating temp and a valid output voltage.

Also keep in mind that the car will run rich on startup until it can begin working in closed loop with the O2 sensor.

It's always a good idea to post a log with using DSMLink, first it lets people see what you have configured and it allows them to see the sensor values during your issues.

 

[DSM's 4 life]

Well it's not lighting up when the car is running shouldent it light up not just only on startup?

 

[steve]

I would assume that in order for the LEDS to light up there needs to be a voltage from the Sensor but I'm also assuming that you have verified that the power for the gauge remains on the whole time and it's not that the gauge is turning off on you.

 

[DSM's 4 life]

I'm not getting power when the car is running. I tapped into the ecu power black and red
Could I possiably be loseing the ground I feel like if I don't have power on pin 25 my injectors wouldent be working and the ground on pin 92 is a "sensor ground"

 

[steve]

Using pins 12 or 25 for battery voltage and 13 or 26 for the ground should be ok since it's the MPI switched battery power used for other things but pin 92 is only for the sensors grounds not for a gauge power ground.

Which O2 sensor wire did you tap the gauge to for input?

 

[DSM's 4 life]

I am using the front 02 sensor pin number 76

pin 25 for power

and i was using pin 92 for ground but i switched to 26 and that fixed my issue

My a/f looks fine at idle but this is it at 2k do i just turn down my afpr?

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[steve]

No. If the AFPR is set correctly at 43.5 psi base you leave it alone.

The first pass is to dial things in warmed up and in closed loop. If you haven't set the MAFT to defaults now it the time to and start taking logs in DSMLink, post them. At 2k RPM the ECU should be in closed loop and you should be seeing the blinkly light cycle between rich and lean.

 

[My1GLaser]

I have a suggestion for ease of tuning and removing some of the inconsistencies of using a MAFT.

Find out if you can get the GM MAF cable when running V3 lite! Get rid of the POS MAFT. My GM MAF tunes flawlessly now. I do have it in draw-thru which helps a lot.