Explosion, now no start.

[vikenabm]

Okay, I think I've covered all your questions so far.

I verified fuel pressure, set it to 35. Only issues is that may AFPR leaks pressure a little too fast when the ignition is off. I don't think that is keeping it from running.

My injectors are correctly wired to both the ECU on one side and the injector resistor on the other side. THe injector resistor has a good ground.

My ignitor works, it is wired to the correct coil packs and plugs, and the plugs all fire in pairs as described in my write up on the first page of this thread. I hope what I write up is the correct wiring for the 7MGTE - it was the best I could figure from available sources.

I pulled all my plugs - one had a cracked ceramic insulator, don't know if it was firing. others were intact but ALL PLUGS WERE both WET with gas and black with soot, and there was a thin layer of gas on each piston.

My intake air pipes were sooty from sporadic intake runner ignitions.

My original ECU still doesn't run the car, though it cranks. It had no evident burned circuit board components when i took it apart. The new ECU still almost starts the car, it chugs along very rough for a second or two.

I swapped the electronics on the AFM. I'm using the one that came with the Lexus throttle body.

Any thoughts now?

[vikenabm]

I just remembered i might have put in the rc 660 injectors when it stopped working. Would that be enough to flood it?

[vikenabm]

I just remembered i might have put in the rc 660 injectors when it stopped working. Would that be enough to flood it?

[cre]

I'm probably not going to be here much for the next couple days. My grandfather went into the hospital and was diagnosed with a hematoma (sp?) in the brain. It's nothing they can correct and he was on blood thinners so it's just a matter of time.

Would you please set your crank to 0?BTDC, take the cover off of the CPS and post a picture of the internals? I'd like to see if it's clocked correctly internally.

The 660's would make for rough running and starting but it should still burn and not fire back into the intake plenum. I'm not saying it's not possible but I don't think it's very likely. Have you inspected the ISCV and the check valve to make sure enough air is entering the manifold when the throttle is closed?

[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.