Visual inspection and testing of FI trigger points, What are your methods Options

[echocanyons]

I have had a progressively worsening problem with part-full load bucking it seems to be worse when the engine is cold.

I have tested/replaced the TPS.

Now I am leaning on the FI points being the culprit.

How are these tested? What should I look for upon visual inspection?

Any other causes for my symptoms?

here is what I have gone through trying to nail this down:

Ingition improperly set (mine is spot on to factory specs)

Possible malfunctioning vac adv (mine seems to function with suction)

Fuel pump/filter clog (my tank was recently acid bathed and has a new filter and a inline pressure gauge reads normal at idle and revs while sitting).

[goose2]

The main problem I've seen with trigger points is that the rubbing blocks wear down until they don't open up enough anymore. I've got new life out of old ones by bending the contact point arms (the fixed ones) back equally just a little bit. I'm sure there's a spec on what the proper gap should be somewhere....you could set them up accordingly with them installed and the breaker plate removed. To test, hook up a ohm meter or test light and make sure they are making and breaking reliably. A little buff job with some 400 grit (leave NO residue from abrasives) and a good cleaning with contact cleaner (Radio shack) is a good idea. Make sure the dist. cam is clean and lubed with dialectric lube or dist. lube. When you reinstall them, there may be some play in the mounting. Make sure they're centered and seated nicely. I think new ones are still available too. Other suspects may be TPS, MPS, CHT sensors.