PE Explaination

Reply Subscribe

Thread Tools

Search this Thread

Feb 25, 2007 | 09:20 PM

Nakoz

Thread Starter

Launching!

iTrader: (2)

Joined: Aug 2003

Posts: 211

Likes: 0

From: Norco, Louisiana

PE Explaination

Can someone please explain to me PE and how it works? I know that PE stands for Power Enrichment, and according to HPT its used for WOT.

What I dont know is how it actually works. Does it change the air fuel mixture? If so how? Does it just add more fuel and how does it know when to add, does the VE table aid that?

I searched this forum and read most of the Intro documentation but I still cant grasp the concept.

Thanks in advance.

Feb 25, 2007 | 09:25 PM

brad8266

TECH Senior Member

iTrader: (23)

Joined: Aug 2005

Posts: 8,797

Likes: 0

From: Watertown, NY

Its pretty simple. When you floor it the PCM knows you are flooring it by the Throttle positon and it will add additional fuel on top of what is already in the MAF/VE tables for stoich which is 14.7 AFR. PE is expressed as a multiplier of stoich, so if your PE table says 1.10 in all the cells, the PCM will be caluclating 13.36 AFR @ WOT because the PCM was adding 1.1 more fuel into the engine (14.7/1.1=13.36)

Feb 25, 2007 | 09:42 PM

Nakoz

Thread Starter

Launching!

iTrader: (2)

Joined: Aug 2003

Posts: 211

Likes: 0

From: Norco, Louisiana

Awsome!! Ok that explains the EQ Ratio vs. RPM table, but what does the Add vs ECT do? I am not trying to be annoying, im just trying to understand this so I dont miss out on anything.

Feb 25, 2007 | 09:47 PM

brad8266

TECH Senior Member

iTrader: (23)

Joined: Aug 2005

Posts: 8,797

Likes: 0

From: Watertown, NY

Quote:

Originally Posted by Nakoz

Awsome!! Ok that explains the EQ Ratio vs. RPM table, but what does the Add vs ECT do? I am not trying to be annoying, im just trying to understand this so I dont miss out on anything.

ECT adder will add even more fuel depending on the engine coolant temps.