8 stack FI issues

[RICK LAKE]

hercf 16 Herc before you damage the motor, goto a dyno shop in your area and have the FI system setup for high altitude. These FI systems with self adjust are for fine tuning AFTER you get them into the correct settings. A have an Speed Pro system which was before they changed to F.A.S.T. There are 2 styles of running these system, one runs off the TPS signal. The other way is with a Baro and Map sensor. From the readings you have giving, You are out of range and getting limit readings.
Out side of synro of the throttlebodies, Let a pro do this. I have been a tech for over 30+ years. I figured I could do my own tuning at the start. I ran into the same problems. IF the camshaft doesn't give a good steady signal to the map sensor the whole system goes crazy. It will never correct itself. I ended going to a dyno shop and found that Speedpro had setup the ECM with a BBC softwear. It was amazing how a motor could run so far out of range. The guy said my motor was too far out with a rough camshaft and had to go to the "N" programming. 3 hours later, holy cow. Idles, hauls a$$. was slipping the tires on the dyno drums. Other thing you need to have correct are fuel pressures. I run over size injectors of 50 pounders instead of 38-42 pounders. I have a vacuum regulator on the system and with 13 HG of vacuum idle the car with 35-36 psi which is low but gives good control. The max duty cycle for my injectors at 6,200 rpms is only 56%. I built this motor for a supercharger and had blt problems and left it off. This is the reason for larger injectors. My fuel pressure does run at 46-48 rail pressure. I don't have any black puffs or hesitating when hitting the throttle. ( side note, with FI system learn to roll on and off the throttle and not stab it. You will see alot better drivability and responce this way).
I could go on for hours, but Jamo will limit my talk. Anyway Call around and find a dyno shop in the area and trailer the car over for setup. It will cost you 300-500 dollars. The car will be setup correctly for your high elavation. Make sure you get a Mstick of disc of the programming when the car is running right. This way if you should not want to leave well enough alone, you can always go back to the originial tune. This should be included in your dyno repair time. Don't be afraid to ask for it. Your the customer. I have mine for both motors. Good luck Rick L.