With luck ,this is the right spot for this thread. About 6 months ago I installed AGM TPI conversion on to the 305 in my buddies 85 Monte Carlo SS. The whole conversion was previously installed on a 1970 Camaro and is therefore secondhand to us. All of the components match up with about a 1991 Camaro 5.0 Vin F lb9 engine. When we first installed it back in August it ran really really rich and a local tuner created a new prom and tune that was more suited to the application. At the time we were having trouble with the idle and a surging issue. The idol turned out to be a cracked idle air control valve and the surging turned out to be a mismatched timing Tab and balancer. Now I finally got the base timing set at 6 degrees with the black and tan wire disconnected. I've set my base idle and my TPS at .54 volts. The trouble I'm having now is after about 10 minutes of run time the engine will randomly stall. I have narrowed it down to an ignition issue as when the engine stalls my noid light continues to flash until the engine stops spinning but my timing light stops flashing immediately. Upon restart the engine will run for 1 to 2 minutes before stalling again. The pickup coil in the distributor has been replaced and the resistance false within spec. The ignition module has been replaced as has the ignition coil. The ignition coil is mounted directly to the intake manifold with a steel bracket. When the engine stalls I still have 12 volts at the ignition coil. I was in the process of checking the four circuits between the ECM and the ignition module when I developed a fuel leak and had to stop for the night. I'm using Factory Chevrolet service manual for the 91 Camaro for reference Speaking of fue, my pressure seems to hang right around 40 PSI. I am using the small cap distributor they came with the conversion, I have the adapter between the ignition module and the ECM harness that goes from a large 4 pin to a small 4 pin. I have noticed an interesting quirk in that if I disconnect the coolant temp sensor, the engine will run longer before Stalling. it is also worth mentioning that I have picked up a second ECM with the appropriate part number ending in 7730 and currently have it installed with no change to my stalling issue. it seems as though I'm having a problem with the bypass ignition system. Am I headed in the right direction? Any advice you folks have would be greatly appreciated!