'87 GN; at first no power, now won't start

[dadsbad]

My '87 GN has 3 1/2" maf, Translator Plus, Extender Extreme chip, Scanmaster 2.1. Direct Scan , mods to turbo , engine, exhaust to develop 481 RWHP. Now; it was running great and all of a sudden after setting up and being jump started a couple of times, it would drive, but had no power and you couldn't accelerate without the knock gague going off. Currently the car will not start, turns over but no start. It was showing 5-12 gps on maf on Direct Scan with first problem. 2 known good maf's have been tried as well as another ecm, ecm with stock chip and stock maf, also the Translator Plus was sent in and verified to be in working order.
Also does anyone have any crisp high res wiring diagrams that are downloadable?
I need help bad, as I want to drive the car and not just look at it!
The fuel pressure is good.
Any ideas anyone?

 

[441120]

no start

Check the basics? Injector pulse, spark? Does it sound ok cranking, timing chain? Crank sensor? If jump started correctly it shouldn't hurt anything. You need air, fuel, compression, and spark in the correct order.
Good luck!

 

[ES1]

Does it have fuel pressure?
Check all fuses.

 

[dadsbad]

no start

I've got fuel pressure (45 lb) when key is turned on. I have spark at the coil pack. How do I check injector pulse? I will check fuses today, I think I have already, but will again. How can the crank sensor be checked?, wouldn't this show a malfunction code on Scanmaster? I will also be checking correct positioning of the cam sensor, or maybe it's gone bad. The engine only has about 1000 miles on it, so timing chain should be good. Also engine sounds fine when cranking. Thanks for the tips, guys, if you can think of anything else, post additional replies.

 

[441120]

injector pulse

Use test light hooked to ground, key on, the brown wires at injectors should show 12v. Test light hooked to 12v, black with colored tracers should get ground pulse while cranking.
Check all of them, check to make sure you have spark to all at the plugs not just the coil. If engine was just done, check the wiring harness for damage also check for good grounds.
No code for crank sensor, check for looseness, contact with reluctor ring on balancer, might see rub marks.

 

[dadsbad]

injector pulse

Thank you, I'll check it out today. Also all fuses are good in the fuse panel.