Hey guys,

I had an unfortunate experience a few weeks ago where when changing lanes on the interstate I hit some road debris, which resulted in destroying my oil cooler. The oil cooler was mounted in front of where the air intake tubing came down on the drivers side behind the inner fender liner.

Needless to say, the car sucked up a bunch of oil in between the 10 seconds the debris was hit until I realized I had damaged the oil cooler. The oil cooler and front end damage was repaired.

However, now under 1/4+ throttle/WOT at 1500RPM-3500RPM, my AFR gauge drops from "10" (its lowest reading) to about 10.2. This doesn't seem to be a particular problem as the car has plenty of power. However at 5900RPM, the car falls on its face entirely, and the AFR gauge pegs 17.0. So I have no power from 5900-7100RPM.

I thought this may be a fuel delivery issue, but I then considered perhaps the oil that was being sucked under at least partially positive vacuum pressure could have infiltrated the SS box via the vacuum hose and damaged the unit.

Any thoughts on how I may be able to test the functionality of the box? Any other thoughts or recommendations? Thanks.

Car Info:
2005 Infiniti G35 Coupe (Rev-Up)
Vortech with non-revup cogs and a 3.12 pulley.
Stock in-tank fuel pump, with Walbro 255lph inline and Vortech FMU.
Deutschwerks 550CC injectors
DevilsOwn methanol injection (~33% Methanol + 66%DI water)

 

Stop! Driving hard like you stated, in till you get the problem fixed, you will Fry your motor!

1. Did you Clean your MAF Sensor?
If oil got in your intake it surely got to the MAF. This will through off the Signal to the ECU, and the ECU will not know how much air is coming in the motor, and con not give it the right amount of fuel. It take an incredibly small amount of contaminant to cause the MAF not to work correctly.


Get some electric contact cleaner, to clean the MAF. And clean out the oil thru-out the intake system.

2. Don't know where else the oil went, did you check the SS box to see if it had oil on it?

 

Cleaned the MAF.

I am going to take a look at the SS Box to see if I can see anything wrong, and clean out the vacuum hoses. SplitSecond recommended connecting voltmeter to power to in-line fuel pump and see if it reads a power under boost to see if the box is working.

Also will get a fuel pressure gauge to check out that.

 

Have you checked the Aux Fuel Pump setting in the R4 Software to verify it did not get changed?

 

^I hooked up my laptop to the box tonight. In system settings should it be set to Additional Injector Controller or Programmable Signal Calibrator? I picked Vacuum/Pressure for display mode.

However watching the real time variables with the engine running, at an idle my Vacuum/Pressure manual Autometer gauge registered about -12ish PSI of vacuum. At the exact same time the SS box was telling me that the Pressure was 2.1 and Vacuum was 0. To me this suggests even at an idle under vacuum my SS box thinks it is under 2PSI of boost.

What are the settings for AUX pump supposed to be?

 

Looking at the RealTime Chart, is not the way to do it…….

If you want to verify how it's working, run your car while watching the Highlighted Cell in the Maps. If you give it some gas, you will see the Cell move very quickly thru the cells.

Here are the Settings I used when i used an Aux Fuel Pump.

System settings

Display mode, you should have vacuum/pressure selected
Application, you should have programmable signal calibrator


Output settings

PWM mode, pressure 0 to 30 PSI/5vdc
Output A mode, Aux fuel pump with abortive start time
Output B mode, over RPM and Pressure

Over RPM, 950
Over pressure, 1

 

Thanks, I will try that tomorrow. Meanwhile here is a SS of my Fuel Map. To my knowledge it has never been changed from default values. But it seems like in the upper PSI/RPM ranges, the trim leans out?

 

I can not tell you from your fuel map what you AFR's are doing…..

Who did the Tune?

The Stock maps from Vortech Are Crap.

But, I can tell you IMO, Who ever did the tune did not know what they were doing….

In the Fuel Map, Values should not very more that .5 from Cell to Cell in any direction.

Also, can tell you from looking at part of your map, most likely your car does not run very well.