Hello,

I am trying to connect my friends 93 Chevy G20 with 5.7 and 16146299 AWLD ECM. I downloaded $99 ADS, XDF and already had ADX file. Tunerpro RT connects when the engine is stopped. Shows me battery voltage, TPS changes as I move the accelerator pedal. Other than that, it says lots of malfunction codes are in error.

Problem is when I start the engine. The lower "Connected" blue rectangle starts flashing red. Only sometimes it stops and gives me RPM, which then stays the same until it gets another signal - sometimes it takes more than a minute to get another one.

This ALDL USB converter works well with my $42.

Am I doing something wrong? Or is it caused by the vehicle?