need a little TBI help
I just did an engine swap on a TBI truck 92 model. The engine was a rebuild out of an 88. While the engine was out I changed the cam, lifters and chain, CS1014R RV cam. Edelbrock TBI Manifold, 15lb regulator spring, new throttle body (stock), I put a Harris performance chip in it.
Anyway I got it started up but it is running like crap and over heating. I had some issues getting it to fire up (dist was 180 out) but after that it fired right up running a bit rough but not bad. I pulled the advance wire and set the timing to 0. I plugged it back it and attempted to seat in my cam. It ran a few minutes and started over heating. I tried burping it. It wouldn't even idle without over heating. I pulled the tstat and drilled a 1/8" bleed hole, jacked the front end up. I finally got it so where it would run about 240 at idle. As soon as I shut it down and give it a few minutes it cools right down to 120 (like I have an air pocket) I am getting good flow through the radiator and even pulled the temp sender out to make sure there wasn't air. I put the stock prom back in with no difference.
It is also running very bad. It labors to get to 3k rpm and backfires through the exhaust when I let off. Its running a little rough and very slow to respond. I took it down my driveway and it has no power at all. I pulled the valve covers and adjusted the valves, rechecked the plug wires and rechecked the timing. I am running out of things to check.
Thanks for the help.