What defines WOT?
Melting Slicks
Joined: Sep 2007
Posts: 2,597
Likes: 3
From: READING PA
St. Jude Donor '08-'09-'10
System in wot.
We ALL KNOW WOT MEANS WIDE OPEN THROTTLE. As far as the system ECM/PCM knows the position of the Throttle plate or " Butterfly". There is a TPS or Throttle position sensor that puts out a 0-5VDC being representative of fully closed to fully open. The PCM uses this signal for a host of other functions as controller. The first one that comes into mind is "commanded throttle position." you can use any programer HP TUNERS PREDATOR and the like.
Instructor
Joined: Apr 2009
Posts: 145
Likes: 0
There is a "Power Enrichment" (PE) table and other relavent Open Loop tables. The PE table is a fuel multiplier table from Stoich. To leave Closed Loop and enter PE, you can set Mass Air Pressure (MAP), RPM, and Throttle Position thresholds.
Thread Starter
Burning Brakes
Joined: Nov 2008
Posts: 862
Likes: 0
From: Gaithersburg MD
This is not a hard question
Seems like my question got lost in the thread.
Obviously we all know what the WOT abreviation means.
The question is:
On what basis does the ECM/TCM use to select WOT tables over the high end >= 81% plus columns in Partial Throttle tables?
Obviously we all know what the WOT abreviation means.
The question is:
On what basis does the ECM/TCM use to select WOT tables over the high end >= 81% plus columns in Partial Throttle tables?
Thread Starter
Burning Brakes
Joined: Nov 2008
Posts: 862
Likes: 0
From: Gaithersburg MD
PE mode vs WPT mode
I assume the implication is that WOT mode and PE mode are the same thing. Is this true?
If I look at my tune under Engine>Power Enrich>Power Enrichment PE Enable table I find:
MAP = 15 kPA (based on the editor this is the min MAP value to enter PE)
There is only a Hot PE Enable TPS table (despite the editor notes claiming a cold table). The entries in the table are 19% or less. Again nothing to do with WOT. In my case 19-20% is the lowest reading I get from the TPS.
If I look at my tune under Engine>Power Enrich>Power Enrichment PE Enable table I find:
MAP = 15 kPA (based on the editor this is the min MAP value to enter PE)
Problem is that 15 kPA is way to low for a WOT threshold. I think at WOT typical MAP is near atmosphere (100-105 kPA). So this is really not a threshold to enter PE mode.
Enable RPM = 300, clearly this has nothing to do with WOT.There is only a Hot PE Enable TPS table (despite the editor notes claiming a cold table). The entries in the table are 19% or less. Again nothing to do with WOT. In my case 19-20% is the lowest reading I get from the TPS.
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Safety Car
Joined: Jun 1999
Posts: 3,570
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From: Austin, Singapore, Kuala Lumpur, Houston, Dallas, Hong Kong, Elgin, etc.. Texas
0 - 3000 RPM = 48%
3500=36%
4000= 25%
4500=15%
Over 5000=3%
I doubt your 2009 is the same.
On the 2005, the % TPS to enable the PE is fully adjustable every 500 rpm. Hope this answers part of your questions.
Last edited by Mez; Jul 27, 2009 at 11:17 PM.
