[beyondloadedSE]

Originally Posted by Neutrino

You might need to reset the ecu. The weapon R intake just gave your car more air and if the ecu regulates the air like it used to do with the normal intake your engine is running too lean.

How does an ECU regulate airflow. You mean fuel right?

The MAF is whats calibrated for fuel delivery. Think of it this way. The MAF receives an input (airflow or CFM) and the delivers an ouput (fuel). Its calibrated for a pretty large range for CFM values. Actually, you can make about 300 hp on the stock MAF before it pegs at 5 volts. So just because your airflow has increased doesnt mean your PCM isnt going to have an idea as to how much fuel to deliver, because it does. Its calibrated from the factory.

Originally Posted by mstangv8302

Since the EGR lines are circulated through the intake piping instead of the manifold, if there are any leaks in the pipe the car will perform poorly or even stall out depending on how big the leak is

The EGR is not circulated into the intake piping. This is the PCV (Pressure Crankcase ventilation) system. These MUST be plugged into the intake piping or your car will stall. This is unmetered air since it enters after the MAF and as a result, must be taken into account within the stock tune even though its not actually reading it.

If your PCV isnt leaking, it may be due to the fact that the MAF adapter to the filter is severly undersized and has a sudden expansion leading from the filter to the MAF. This is going to create 'shock' pressure losses since the velocity distrubution is not uniform. Consequently, the MAF sensor will get an inaccurate reading.

The concensus amongst the Cougar community (www.newcougar.org) and the Contour community (www.contour.org) is that this intake is pretty much garbage. If I were you, I would get an K&N RU 3530 intake filter and a MAF adapter from www.batinc.net and call it a day. If you want the polished intake pipe, they have that too. Nobody complains about this setup.