Open loop PE?

Reply Subscribe

Thread Tools

Search this Thread

Apr 17, 2006 | 08:55 AM

Sotiri

Thread Starter

Staging Lane

Joined: Mar 2005

Posts: 53

Likes: 0

Open loop PE?

Is POWER ENRICHMENT used in open loop? I'm sure it is... But i want to make sure before i disable it and put the pedal to the metal.

Apr 17, 2006 | 09:07 AM

MeentSS02

Kleeborp the Moderator™

iTrader: (11)

Joined: Mar 2004

Posts: 10,316

Likes: 6

From: Dayton, OH

Yes it is...it (the PCM) picks the richer of the values from the Open Loop F/A table and the PE table.

Apr 17, 2006 | 09:07 AM

MeentSS02

Kleeborp the Moderator™

iTrader: (11)

Joined: Mar 2004

Posts: 10,316

Likes: 6

From: Dayton, OH

So just make sure one place or the other is rich enough should you floor it while tuning.

Apr 17, 2006 | 09:42 AM

Sotiri

Thread Starter

Staging Lane

Joined: Mar 2005

Posts: 53

Likes: 0

PE for coolant temp is to add 15% fuel and PE for RPM is to add 0% to 8%. These would make sense for a AFR start-off point of 14.7. But if the open loop at 100 MAP is 12.9, it would be too rich. But I guess you make sense

Apr 17, 2006 | 10:02 AM

MeentSS02

Kleeborp the Moderator™

iTrader: (11)

Joined: Mar 2004

Posts: 10,316

Likes: 6

From: Dayton, OH

Quote:

Originally Posted by Sotiri

Glad someone did, because I didn't understand a word you just wrote

Apr 17, 2006 | 10:38 AM

chrisj6

TECH Enthusiast

Joined: Dec 2005

Posts: 512

Likes: 0

From: Conway, AR

I understood open loop and PE

Apr 17, 2006 | 02:23 PM

GuitsBoy

TECH Senior Member

iTrader: (4)

Joined: Apr 2003

Posts: 6,249

Likes: 3

From: Long Island, NY

You are technically in open loop mode, since the o2 data is thrown out.

The computer takes its fueling values from whichever is richer: The OLFA table (x-referenced by ECT & MAP) or PE (x-referenced by RPM). I have my OLFA table set to all 1.00's from 178* on up, that way WOT always gets it fueling from PE.