Results 1 to 3 of 3

Thread: Handheld display useless today. Will new 553-108 work or options?

  1. #1

    Default Handheld display useless today. Will new 553-108 work or options?

    Hey Gang: Like a lot of other folks who bought the Avenger system and the handheld display/programmer device, ours has decided to get so dim you can't use it. The car was down for a few years - worked just fine a few years ago, now it's so dim you can't even read it.

    So, we either need a new handheld (have no idea as to the part number and availability), OR can we use the 553-108 display? The ECU is basically a Holley HP ECU - and we upgraded the firmware to V5 and can use the V5 software, so I believe this "might" work.

    Kind of annoying that so many Avenger users have seen this problem - to me this is a distinct DEFECT in the product that we should not have to deal with on our end. When I buy an Apple iPhone - the display continues to work for many years, I expect the same of Holley.

    Note: This is not my only Holley EFI purchase - just bought two box fulls of Dominator stuff - for a big blown application. What say you Holley? Dale

  2. #2
    Join Date
    Dec 2009


    The early style handheld controller (LINK) is now obsolete. The new style 3.5" LCD touchscreen (LINK) isn't too expensive, and it's much better!
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS T/W 11R 205 heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 200A 3G alternator, Optima Red battery, R134a 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, -6AN fuel system plumbing, Walbro 255 LPH pump, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, B&M Hammer shifter, FPP aluminum driveshaft, FPP 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 M/T Street Comp tires.

  3. #3
    Join Date
    Nov 2014
    Ont. Canada


    That small handheld does not work with the newer versions, so as soon as you updated the ECU, you would have to get a new 3.5" LCD display.

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