Page 1 of 4 123 ... LastLast
Results 1 to 10 of 40

Thread: Power Enrichment questions

  1. #1
    Junior Member
    Join Date
    Aug 2006
    Posts
    33

    Default Power Enrichment questions

    I am new to tuning and am still working through my VE table which is coming along nicely ... most values are within +/- 5. I'm also struggling a bit with Open Loop since I do not have access to a WideBand O2 yet. I am coming to the realization that both Open Loop and PE tuning will require the WBO2 (to my knowledge they both ignore O2 sensor output). My biggest question is when is PE actually enabled ?

    Okay, here is the info: I am using the 2001 Express Van as a base tune, which has the following criteria:

    {B3608} Delay Before Entering PE = 65 sec.
    {B3610} PE Delay RPM Bypass = 5200
    {B3611} PE Delay Coolant Temp Bypass (upper) = 121 F
    {B3612} PE Delay Coolant Temp Bypass (lower) = -40 F
    {B3613} PE MAP threshold = 55 kpa

    So is the above criteria mutually inclusive ? So in order to Bypass the 65 second delay ... the RPM has to stay above 5200 AND the ECT > 121 F AND MAP > 55kpa ? Or does only one of the above criteria have to be met in order to reach PE mode ?

    Which leads me to my next question ... is there a PID to monitor/log when PE is reached ?

  2. #2
    Lifetime Member mr.prick's Avatar
    Join Date
    Nov 2006
    Posts
    3,195

    Default

    {B3616}
    is what you want to look at.
    you select PID SAE.TP (absolute throttle position)

  3. #3
    Junior Member
    Join Date
    Aug 2006
    Posts
    33

    Default interesting

    Quote Originally Posted by mr.prick
    {B3616}
    is what you want to look at.
    you select PID SAE.TP (absolute throttle position)
    So the {b3616} table is what controls PE ... makes sense. Thanks.
    Ah, yes ... TPS makes perfect sense to log/monitor if {b3616} is controling PE.

    Anyone care to enlighten me on the other parameters I pointed out ?
    Could they essentially be 'safeguards' to discourage PE until closed loop is reached ?

  4. #4
    Lifetime Member mr.prick's Avatar
    Join Date
    Nov 2006
    Posts
    3,195

    Default

    get a wideband it is a must!
    Last edited by mr.prick; May 31st, 2007 at 11:06 AM.

  5. #5
    Junior Member
    Join Date
    Aug 2006
    Posts
    33

    Default Don't know if it matters

    I should also point out that this is a "MAFless" setup.

  6. #6
    Lifetime Member
    Join Date
    Aug 2006
    Posts
    411

    Default

    It is my understanding that you would set B3608 to 0. That way when it does meet the criteria to get into PE it won't have to wait 65 seconds before doing so.

  7. #7
    Junior Member
    Join Date
    Aug 2006
    Posts
    33

    Default

    Quote Originally Posted by Lextech
    It is my understanding that you would set B3608 to 0. That way when it does meet the criteria to get into PE it won't have to wait 65 seconds before doing so.
    Thanks Lextech, that is where some of the confusion was. It almost seems as if the PE Mode is 'disabled' in the Express Van due to extreme parameters.

    I'm still unsure if the {B3616} table alone will override any of the other 'criteria' I listed in the original post. Anyone know for sure ?
    (ie., say {B3616} values were all TPS% = 50; Would that override or bypass
    all the folowing parameters and ALWAYS hit PE Mode at >51% TPS ?)

    {B3608} Delay Before Entering PE = 65 sec.
    {B3610} PE Delay RPM Bypass = 5200
    {B3611} PE Delay Coolant Temp Bypass (upper) = 121 F
    {B3612} PE Delay Coolant Temp Bypass (lower) = -40 F
    {B3613} PE MAP threshold = 55 kpa

    I may do some experimenting tonight to try and figure this out.

    Thanks all.

  8. #8
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    27,752

    Default

    In addition to setting B3608 to 0, I would set B3610 to 400 rpm.

    You want PE immediately as dictated by B3616 and B3613.

  9. #9
    Junior Member
    Join Date
    Aug 2006
    Posts
    33

    Default What I've learned so far ...

    Well,
    just as a follow up ... we did some experimenting with a 2000 FireHawk tonight. In looking at the PE Criteria the first thing I noticed was that
    {B3608} was set to 0 (just as lextech and joecar mentioned).

    The other huge difference was the {b3616} table itself. The TPS% was mostly around 50-65% TPS, very unlike the 90% in the Express Van tune.

    The third piece of information I learned tonight, was that the O2 sensors do actually provide feedback during PE mode. I was mislead from other research that PE Mode was similar to Open Loop in that the O2 sensors did not provide useful data as feedback.

    Oh, and I think I might have some opportunity to play with a WBO2 ! I have access to one now.

    Do I need to install the software that came with it ... or can I just use EFILive to monitor/record the feedback via the Wideband O2 install tutorial found under the download section of this site ? It looks from the tutorial like it is just redirecting the WBO2 output back into EFILive into the NBO2 PID locations ... can anyone verify this ?

  10. #10
    Lifetime Member 5.7ute's Avatar
    Join Date
    Oct 2006
    Posts
    1,836

    Default

    The third piece of information I learned tonight, was that the O2 sensors do actually provide feedback during PE mode. I was mislead from other research that PE Mode was similar to Open Loop in that the O2 sensors did not provide useful data as feedback.
    I would like to see the research that come to this conclusion. Since PE is a richer than stoich mixture the o2 sensors will not be able to calculate the AFR with any accuracy. Also from my understanding any learnt fuel trims are added into pe mode which will prevent you from getting any relevant data for the ve table anyway.

    As for the wideband it is connected through the external inputs in the flashcan. You will need to monitor the correct pid for the wideband output voltage. Out of the box the generic pids will be fine however if whoever you borrowed the wideband from has changed the output voltage you will need to change the pid to suit.

Page 1 of 4 123 ... LastLast

Similar Threads

  1. E38 and Power enrichment
    By markemac in forum E37, E38 & E67 PFI ECM's
    Replies: 14
    Last Post: March 6th, 2010, 03:28 PM
  2. MAF'd Power Enrichment less than 100% TPS
    By Highlander in forum E37, E38 & E67 PFI ECM's
    Replies: 6
    Last Post: March 19th, 2009, 06:00 PM
  3. Power Enrichment
    By shane in forum Forced Induction and Nitrous Oxide (N20)
    Replies: 5
    Last Post: May 22nd, 2008, 03:27 AM
  4. no power enrichment on '06 trucks ??
    By tblu92 in forum General (Petrol, Gas, Ethanol)
    Replies: 15
    Last Post: October 17th, 2007, 12:28 PM
  5. Power enrichment mode explained...Please:)
    By 01blkss in forum General (Petrol, Gas, Ethanol)
    Replies: 14
    Last Post: May 21st, 2006, 06:09 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •