Page 1 of 2 12 LastLast
Results 1 to 10 of 12

Thread: Programming A Limp Mode

  1. #1
    Join Date
    Jan 2017
    Location
    West Tennessee
    Posts
    8

    Default Programming A Limp Mode

    Is there anyway that an HP system can have a limp mode programmed through an Input or Math Channel, so as to ignore the Learn Table and put it in Open Loop? I had to get a tow from quite a distance due to a bad WBO2 sensor, and got to thinking about this. Could have saved me $145.

  2. #2
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    22,452

    Default

    Yes. If you have any one of the Holley EFI touchscreen units, they can change Global Files (create a non-sequential, Open Loop, emergency GF, etc.), by storing them on the SD Card. However, with a Holley EFI touchscreen unit, you could've easily selected Open Loop without changing Global Files. The Holley EFI Digital Dash will even let you Clear the Learn Table. Read post #11 below for more information.
    http://documents.holley.com/techlibrary_199r10751.pdf (Holley 553-108 3.5" TSLCD Instructions - "Closed Loop Enable/Disable", Page 21)
    http://documents.holley.com/199r10746rev1.pdf (Holley 553-106 Digital Dash Instructions - "EFI Tuning", Page 37)

    The 3.5" & 5.7" LCD Touchscreens can also quickly & easily change Global Files by storing them on the SD Card. And now the Digital Dash is also capable of storing/changing Global Files, except it's stored on a USB flash drive. I have the Digital Dash & 3.5" Touchscreen units, but I store my "known to be good" & "emergency" Global Files on the 3.5" TSLCD, because it conveniently holds the SD Card inside. I actually prefer it over the 558-407 Multi-Map Selector Switch (Dominator ECU). Read post #11 below for more information.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  3. #3
    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    124

    Default

    Could this be done with a laptop or tablet? Or just the touchscreen? Thanks.
    '57 Chevy, 327, Holley HP MPFI, 700R4, 3.73 gears, plus much more.
    '51 Studebaker Starlight Coupe, 350 Chevy, Weiand 177 blower, Holley HP TBI, TH400, Gear Vendors OD, plus much more.

  4. #4
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    22,452

    Default

    Of course it can be done with a laptop/tablet. The EFI software is capable of everything! The touchscreen units are a convenient means of accessing most of the EFI software parameters.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  5. #5
    Join Date
    Nov 2013
    Location
    Chicago IL
    Posts
    1,952

    Default

    It could be done with a simple switch. Turn on the switch, and activate an "Advanced Table", turn all of your Closed Loop Limits & Learn Limits to zero, effectively creating Open Loop.
    -Scott
    Don't forget to check out progress on my Race Car:
    Project Blasphemy - 8.07 @ 171
    Low 8 Second Street Car

  6. #6
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    22,452

    Default

    Yes, but I don't want to install/wire another switch for this reason. Also, my "emergency" Global File has other modified/disabled parameters.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  7. #7

    Default

    Excellent suggestion. I was thinking of doing something similar to enable a "Valet Mode" (pull timing, lower rev limit, lower DBW throttle position %, etc.).
    Andrew

  8. #8
    Join Date
    Jan 2017
    Location
    West Tennessee
    Posts
    8

    Default

    Quote Originally Posted by S2H View Post
    It could be done with a simple switch. Turn on the switch, and activate an "Advanced Table", turn all of your Closed Loop Limits & Learn Limits to zero, effectively creating Open Loop.
    Could this be done by using a 1D Table with everything zeroed out, and checking "Inhibit CL Compensation When Activated" and "Inhibit Base Fuel Learn When Activated"? Then Enable it with a new Switched Input? Anything I'm missing?

  9. #9
    Join Date
    Dec 2009
    Location
    Connecticut
    Posts
    22,452

    Default

    Yes, the two Inhibits (CL & Learn), and the Switched Enable.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  10. #10
    Join Date
    Nov 2013
    Location
    Chicago IL
    Posts
    1,952

    Default

    Quote Originally Posted by Norwood View Post
    Could this be done by using a 1D Table with everything zeroed out, and checking "Inhibit CL Compensation When Activated" and "Inhibit Base Fuel Learn When Activated"? Then Enable it with a new Switched Input? Anything I'm missing?
    You'll use the "CL Compensation + Limit Override" in the Advanced Tables. A setting of 0 in all cells will keep it from making any Closed Loop corrections, and will Zero out the Learn Table (by the function of a zero Learn Limit).
    -Scott
    Don't forget to check out progress on my Race Car:
    Project Blasphemy - 8.07 @ 171
    Low 8 Second Street Car

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
About us
Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors have powered every NASCAR® Sprint® Cup team and nearly every NHRA® Pro–Stock champion for four decades. Now, Holley EFI is dominating the performance world as well as our products for GM's LS engine. Holley's products also include performance fuel pumps, intake manifolds & engine dress–up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies - Hooker Headers, Flowtech Headers, NOS Nitrous, Weiand, Earl's Performance Plumbing, or Diablosport - Holley products can give you the edge you need over the competition.
Join us