Uncle Tony's take on injection issues.

I’ll tell you why 99% of aftermarket throttle body injection systems have drive ability problems. It doesn’t have anything to do with the ratio of vaporized to atomized fuel in the intake either.

99% of DIY installers don’t read and follow the instructions.

-Proper electrical connections, power and ground feeds, etc. are 90% of the problems.
-Adequate feed/return and pressure regulation along with fuel pump mounting account for some.
-A few are due to application mismatch; Sniper 1 had the ECU at the front of the throttle body. Close proximity to the distributor on small block Fords in particular would cause electrical interference. A shield over the ECU would usually fix this but Sniper 2 moved the ECU to the side of the throttle body to help alleviate this concern.
-bad O2 sensor location and in some cases failure to go through the setup properly could cause excessive fuel to wash out the wide band O2 sensor.

I know Holley systems can successfully compensate over 200%. So no matter how bad your base map is the damn thing will still run fine as long as you haven’t disabled the learning function.

I had several customers bring me Holley EFI systems with problems in the last few years. I finally went to Bowling Green and did Tiers 1, 2, and 3 of their EFI training and let me tell you - those systems are impressive. But not idiot proof…