It's a short ram intake on the car now and the high temps only happen when the car is sitting for a while at idle... I need to get the intake out of the engine bay. The IAT/MAF sensor is functioning properly.... checked it with a multimeter and checked the temp of the intake pipe with a gun...

 

what is your coolant temp when the IAT reaches those levels?

 

coolant with run between 180 to 205

 

your IAT is reading almost as high as coolant temp, there's something wrong...the ambient air under the hood should never reach that temperature...

 

Found the problem... Car went into limp mode today, and I was getting a 0.00 reading on the front 02 sensor. It did not throw a code but I was able to pull what was pending. P0131... That makes it so much easier to fix...

 

Please give me your thoughts on this car

 

Still seems to point out a faulty O2 sensor or wiring. Check for broken wiring, corrosion inside the connectors or faulty O2 operation.

Test both your sensors so you can rule that out. Then follow to wiring and check for tears or crappy DIY repairs, anything that could explain a bad connection.

Testing procedure :


Start from there, bring us the results when you're done.

 

More info on O2 operation :

When the engine is first started, and rpm is above 400 rpm, the system goes into 'Open Loop' operation. In 'Open Loop', the ECM will ignore the signal from the Oxygen (O2) sensor and calculate the air/fuel ratio based on inputs from the coolant and MAF sensors, but mostly from a pre-programmed table in the memcal.

The system will stay in 'Open Loop' until the following conditions are met:

1. The O2 sensor has varying voltage output, showing that it is hot enough to operate properly. (This depends on temperature)
2. The coolant sensor is above a specified temperature about 40oC/104oF.
3. A specific amount of time has elapsed after starting the engine.

The specific values for the above conditions vary with different engines and are stored in the mem-cal. When these conditions are met, the system goes into 'Closed Loop' operation. In 'Closed Loop', the ECM will calculate the air/fuel ratio (injector on-time) based on the various sensors but mainly the O2 sensor. This allows the air/fuel ratio to stay very close to 14.7:1.

 

what is the differences between open open1 and open2. the oxygen sensors and wiring have been tested and the faulty sensor has been replaced already. any other idea?

 

did you meter the whole run from the sensor connector to the ECU connector for continuity?

 

yes, there are no continuity issues between the o2 sensors and the harness on the bottom of the ecu. The o2 system is fine. there has to be another issue. Once the car is forced into open2 the o2 readings return to normal as well. Additional information, the car will not switch to clsd unless there is a full reset to the ecu. the car runs at open at all times and doesn't switch to clsd when the proper conditions are met.

 

 

What is the inner diameter size of your MAF tube? Is it factory size or did you bump it up to 3"?

 

^^bingo