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Originally Posted by xphire
Alright, so the timing should be great now... However, I just noticed something really really weird... It's getting PLENTY of fuel but it's still not turning over... It is turning over SOMETIMES but not all of the time. When it's running, it looks like fuel is spraying way too much into the TB. It looks like a shower inside the barrel. This also causes it to diesel for a few seconds after the engine is turned off. So, I thought maybe it would be the fuel pump relay sending too much fuel, but it doesn't always start and it seems to always be getting plenty of fuel... I'm out of ideas...
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That's exactly how my TBI Olds 5.0L Custom Cruiser acted when the Coolant Temp Sensor got damaged during an unrelated repair. The parts store gave me a sensor that fit the harness, but was wrong for the application. It was relaying erroneous info to the ECM, commanding full rich and making the injectors flow like you are desribing.
Until having someone crank the motor while I watched, and noticing that, I though for sure it was clocked 180 degrees out, as I'd had the distributor out for the other repair I was doing. It would crank and fire and kickback, cough, and diesel like it was outta time, and I about drove myself nuts static timing and trying one tooth this way and that way, and reversing it in the bore, checking firing order, etc.
Just thought I'd toss that out there in case it might have some relevance, somehow.