Explosion, now no start.

[vikenabm]

I'm terribly sorry for your grandfather. I'm a medical doctor and know exactly what you are saying. I'll post here as a sketch pad in your absence in case anyone with a similar problem stumbles on the thread. Between the cam timing and trying the stock injectors I think I will have my answer. thanks.

[vikenabm]

It's running! A handful of problems, but the primary issue was mixed up wiring from the CPS. I found two reversed wires before, as posted, fixed those, but didn't notice the other two were also reversed. fixed nose and it started, running on two cylinders.

Then I was able to sort out the wiring from the ignitor to the coil pack. the wiring from the harness to coilpacks 2 and 3 were reversed in trying to check the wires last week.

This was further aggravated by 650 injectors with the lexus AFM mod. I think I will need a piggyback ECU to make that run well, so I went back to stack injectors and AFM for the winter to get the bugs out. I believe you were right though, the lack of starting was not primarily from too much fuel, but I don't think it helped.

But the original problem leading it to sound like the valve timing was off, and causing detonation, backfiring, etc, was the CPS wiring. Mystery solved.

I will recheck my ignition wiring post to make sure it matches what worked.

THANKS for your help. Hope things went as well as possible with your family issue.

[cre]

Finally! Excellent! I'm just bummed it took so long to sort out. I really need to take pictures of the CPS harness on the next pre89 and 89+ that I end up working on.

With the injectors and the Lexus AFM you should be fine if you pull 10% off the mainscale whether it be with an adjustable fuel pressure regulator or a fuel controller. I would wait until I had a fuel controller though as you're still going to want to fine tune the rest of the fuel map.

Everything with the family was as I expected. He passed on quietly after a couple days, most of us understood what was going on and had no issue but there are a couple family members who are going to need time.

Congratulations on getting it back together! I do hope you'll keep us posted on your progress... As with many things you see a lot more horror stories and than success stories on forums.