[V8] Ecu code, cats

[Coleman, David]

Ok it's now 3:ep am eastern. Here's what I've worked thru:

That 2324 (ecu ground, bad ecu) still there. I checked black plastic doodad hanging from the 2 vac lines. Manual shows it as 1/2 of the frequency valve / control for the carbon canister. Other half still suspended by 2 spubbies in the r/s fender. Maybe a vac leak and I'm good. Refit the halves together, start car, no diff -- barely idles, falls flat under heavy-ish throttle input (bad cat symptom), black/grey smoke out pipe, and odorless sooty water spritzing out the pipe. 

So I do the output tests (fuses good): all 8 injectors click away, ISV clunks open/shut, move to charcoal canistertest and nothing. Correct 4431 blinking out but no indication the canister is actuating. Hand on freq/control solenoid feels nothing. Though sjm says canister is "behind & under cyl head", only thing I see there is exh manifold. Bentley puts it behind r/f fender, which makes sense with hose disappearing back up there. Reach up as far as I can, no canister or sense of actuation.  Meanwile the isv making a humming noise. Whatever, last output test shows cleared ecu. Redo procedure, same result. I trace the freq valve solenoid wire and find a breach where they'd been rubbing against a surge tank bolt. 
Cut back sheathing back and wrap wires in elec tape.  Start up, no diff, same 2324 code. Run output tests again, and still no faint indication of canister actuating, and I'm not pulling the fender liner in search of it tonight. 

Start car, same deal. Test light shows power at freq valve connector. While there unplug ECT sensor behind head and car dies. Restart, now throws 2231 ISV, which tests good at connector. But ECT connector shows NO power. 

It's late. Todo: check proper ecu pin(s) for ect. Pull O2 wire out, and swap in used isv, maybe MAF too.

If you made it this far, please feel free to chime in especially re: no ECT power.  Sure CAT situ needs sorted, but really looks like another issue is at hand..

I heart feedback

DaveC.





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David A. Coleman
BlackRock
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