EGR delete., 7afe Options

[92-gt]

Has anybody done this?

I just got done helping my friend do it on his 2jz. It wasnt bad at all on his car.

I looked at the system on my 7afe and it didnt look to be too bad.

My only concern is, will it throw a CEL?

Thanks for any input on the subject.

[Sinyk]

http://www.fordscorpio.co.uk/egr.htm

EGR is considered a `metered intake leak' and was developed to reduce the combustion temperatures to below 2,500 degrees, the threshold where NOx is created. Not unlike putting a brick in your lavatory to lower the volume of water used, the EGR valve meters a readily available inert gas (actually exhaust gas which contains a lot of very inert Carbon Dioxide) into the combustion chamber to effectively reduce the volume. Smaller effective displacement means less fire, and less heat and thus lower temperatures, thereby controlling NOx emissions.

http://www.asashop.org/autoinc/nov97/gas.htm

How EGR systems work The EGR valve recirculates exhaust into the intake stream. Exhaust gases have already combusted, so they do not burn again when they are recirculated. These gases displace some of the normal intake charge. This chemically slows and cools the combustion process by several hundred degrees, thus reducing NOx formation.

As the combustion chamber temperature is reduced, engine detonation potential is also reduced.

if you unplugged an EGR valve, you'd have a driveability complaint of engine ping.

http://www.autoshop101.com/forms/h61.pdf

By integrating fuel and spark control with the EGR metering system, engine performance and fuel economy can actually be enhanced when the EGR system is functioning as designed

http://en.wikipedia.org/wiki/Exhaust_gas_recirculation

The impact of EGR on engine efficiency largely depends on the specific engine design, and sometimes leads to a compromise between efficiency and NOx emissions. A properly operating EGR can theoretically increase the efficiency of gasoline engines via several mechanisms:

This post has been edited by Sinyk: May 6, 2009 - 12:08 PM