I have a '99 Cat 500 ZL EFI and am having some suggish issues that I hope someone can direct me in the right direction. After it's warmed up and I throttle all the way down, the sled doesn't take right off...it slowly accelerates for about 3-4 seconds then takes off like a rocket. The sled runs great, starts on the first pull, idles fine but it just won't take off. I have a buddy that has a 440 ZL EFI and his takes off like a raped ape. From a stand he's a good 50 feet in front of me before mine takes off. Is this an ECU issue, throttle issue, fuel pump, or timing? I'm just not sure where to start...and I hope it's not an ECU problem (expensive). Has anyone had this problem or know how to fix it?
Thank you for your time and help
bendy
Thank you for your time and help
bendy