Calling all TBI masters!!!! HELP

[Raptor0206]

Whos the TBI master on here? This damn k5 I bought is giving me the blues! 1987 k5 with a 350 all stock. When I bought it it had been sitting for a long time. Prior owner swore it ran but couldn't get it to start. Anyways I bought it replaced the batter and battery cables. No fuel to the injectors so checked power at pump and found the pump to be bad. Threw in a new complete sender and fuel filter and it fired up....had a constant pop out the exhaust here and there. But ran. Got it warm and shut it off and it wouldn't restart. Acted like a dead battery or overheated starter. Next day started fine but hand a stumble. I wrote it off as bad gas. Ordered a new tank and installed that a few weeks later the old gas turned my new sender into a rusty mess but still worked. Still had a miss after that found the injectors to be dripping. Installed new injectors and fuel pressure regulater. Now ran much better but still had same issue. Then I did a tune up new plugs, wires, cap and rotor. No change. Figured it's running rich with some black smoke after you get on it. Replaced the map sensor helped a lot still got the heat soak. Last step I adjusted the timing back to 0 (brown wire unhooked) hooked it back up and runs like crap. With my timing light it was at about 30-32 degrees timing before. I noticed when I first started with the timing light I had a strong constant flash but at the end it was intermediate. Now the truck runs like crap. What would you guys go with next? New ecu? New spark control? New distrubtor? Coil? New o2? (O2 does look new) New egr? also I checked for vacuum leaks and replaced some of the lines along with the plastic lines.

[Katrina/10]

Got a check engine light?

[Raptor0206]

Originally Posted by Katrina/10

Got a check engine light?

None. But unsure if the light is burnt out.

[sntrym95]

Check the ignition coil and the distributor module. Both are prone to failure when hot.

[jnickell41]

I went through a similar issue on my '87 R10. In the end it ended up being a rusted egr valve. Would idle well but as soon as you pulled vacuum on the valve and release, the valve would hang up and run like crap.

[Mr_Rich]

Originally Posted by Raptor0206

None. But unsure if the light is burnt out.

That's the first thing I thought of. The check engine light should illuminate as soon as you turn the key to ON. It goes out after the engine starts in normal conditions. With the waterfall of problems you describe you need that diagnostic capability working. You'll have to pull out the gauge cluster assembly and once you do that remove the gas gauge module to replace the 194 bulb in the top center position of that particular module.
I have a Diacom diagnostic setup for OBD1 testing. I'm not aware of any other OBD1 testers and that might be what you need. So much of this stuff is obsolete that makes testing that much more difficult. Try to fix that light. It sounds like you're capable to do that. Just use a light touch since so much of that plastic is old and brittle.

[Katrina/10]

The engine lamp should be on with key on, engine off. If not, try changing the bulb. It would be good to see if there are any codes in the ecm.