With a third UTEC in and another new MAP sensor the car runs now. Even with MAP averaging at 32 (maxed out) the UTEC is pulling random values from the 100% load zone so I had to flatten the fuel map above 50% load just so the customer can drive the car. Obviously this is NOT how we normally do things, but it's his only car and we had to get it going for him temporarily.

UTEC logs show rock solid boost of 8.9-9.0 psi (he's on spring pressure), but the MAP must have a dirty signal or there is something screwy with the software.

Hopefully TurboXS will do something for the customer as he's had to waste a lot of time and money on this. He's going to need a fix for the problem so we can turn up the boost and fuel the car properly.

-Mike

 

I have heard of others having this same issue, not quite as extreme, but taking values from the wrong area of the map.

Did you enter in your map sensor calibration numbers? What are your map as load threshold numbers? Are your knock constants conservative or aggressive?

I have a car with tuning issues as well. Mostly boost related, but UTEC is still new for the VQ and any information share is helpful.

 

how do we enter the map calibration numbers?

i got 4 calibration numbers on the paper that came with the map sensor.

It says:

PSI
Inputs: Outputs:
Cal 1 : 1712 Cal 1: 20.12
Cal 2 : 1529 Cal 2: 7,32

BAR
Inputs: Outputs:
Cal 1 dont remember this part) Cal 1: 0,1
Cal 2 dont remember this part) Cal 2: 1,01

which value shall i enter ?

 

I am not sure if he entered the map calibration numbers, but I will find out from my tuner in the next few days. And yes I agree the more info we can all share the better.

 

so,

any progress with about your problem?

 

mistaboosta-
your signature says Tomei Billet Rods. Didn't know they made them. How do you like them?

 

I've been using them for 3 years on EVOs and WRXs which boost "at least" 2 bars. Up to now they worked perfect for me no matter how hard i push on them. Once one of my friend's car hydralocked while cruising which normally instantly breaks or bents one or more rods, the engine had stalled, when we opened the engine we found out that the rods were as good as new, the fault was a faulty injector which stucked open. The rods are quite light in weight and looks beefy. Now I'm waiting for them to release their billet steel, light weight crankshaft for VQ35.

 

Sorry no progress, trying to tackle one problem at a time. As you seen in your other post im trying to resolve the p0011 code issue and get this dam car to pass inspection. Agh, this car is driving me nuts always some kind of problem !!!

 

Did u see utec using 100% load zone on the logs or are you assuming so ? I got a similar problem that i couldn't solve yet.

 

I dont think inn tuning will be posting on here anymore, i am no longer using him for my tunning. Yet I still have the same problems, along with when i looked at my utec dashboard I am getting knock all over the place after 4k rpm by just reving the car while it is sitting still.

 

Did you check the knock thresholds? Are you checking the knock from the blinking CEL light or from the UTEC dashboard?

 

I was just sitting there monitoring the dashboard. I dont know very much about the utec program, but something tells me when it says Knock! next to knock event its not good. Hopefully i can get this thing to an excellent tuner/ shop and get all these headaches taken care of.

 

yeah you need to get the car to someone with utec experience, there are a few settings from the factory (base maps and parameters) that will cause it to show knock just cause it is hearin common engine noise. this is due to the sensitivity turned up too high. i would get a whole new set of parameters in there. its easy to do....

tell us all your mods, power adders and we can get you some good parameters...

 

Thanks for the responce, i will just wait till i can get to a good tuner to get this mess all fixed up as long as it wont mess up or break anything in the mean time. If it will mess anything up i guess i will take up that offer on the new parameters.

 

After the car warms up, we see only 45psi at the fuel rail. Under full load and 8 psi boost, we're only seeing 56-59 psi fuel pressure. According to APS, this number should be 66 psi. So we're 7 psi low on the fuel pressure.
]

The condition of the fuel pump is worn [from extra pressure] or a voltage drop in the +12 volts/ground? Examine the current waveform with oscilloscope and amplified current probe under these load conditions.

http://www.picotech.com/auto/automot...illoscope.html
http://www.picotech.com/auto/tutoria...injection.html