View Single Post
Old 08-20-2012, 04:12 AM   #2
vikenabm
Stock
 
Join Date: Dec 2006
Location: Howell, MI, USA
Posts: 21
vikenabm is on a distinguished road
Default update and no progress

Wow. Kind of quiet here. Is it always like this? Anyway, in case anyone reads this, yesterday I pulled the turbo - perfectly good rebuilt stock turbo with no sign of damage. Then while it was off I thought I'd do a leakdown test for boost leaks. Got pressurized to 60psi and found slow leakage from multiple places, greatest was from the gasket between the upper and lower intake manifolds, so I separated them slightly, painted some copper RTV from a spray can in there, and resealed with significant improvement. Then various other slow leaks showed up that didn't seem worth chasing, since it obviously was sealing sufficiently that even at 30psi it wouldn't leak enough to make a big difference.

checked cam timing, both set to stock TDC.

checked all the voltmeter tests you can do without the engine cranking or starting, all were ok, except EFI main relay was 1v below battery voltage, but still within specs with a charged battery. Will check connections and ground there and clean that up.

So that's it. For want of a better idea, I guess I'll put the turbo back on. and try starting it again.

I'm thinking maybe the problem is lack of fuel, for lack of a better idea. Spark and compression and timing all were checked and are pretty easy to observe, though I could stand to double check he igniter circuit to coil wiring. Would like a more direct test of the new RC 650 injectors to be sure they are opening and spraying correctly when installed in the engine, trying to think of how I can be absolutely sure they are operating ok.

I'd like to triple check everything possible before trying to start again. I'm beginning to consider swapping the ECU if I don't come up with a better idea soon. That will involve using an automatic trans ECU and making changes in wiring internally so it works with the manual trans, at least to start it. that's a bit of a PITA, so I was hoping to avoid it.

That's it: no real smoking gun found. Feeling like i'm missing something obvious here. Would love to hear from another real live supra owner out there.
__________________
K&N filter to Lexus AFM | 660cc RC | Holley 255 LPM FP | JE/Eagle internals | 2.5" hard pipes | Toyo high flow intercooler| S Sanchez ported head | 1.2mm beaded MHG | compression 9:1 w/0.5 overbore | modified ex mani | CXR 3" full exhaust | Slotted/drilled rotors |New WG spring @12psi w/ dual switching man boost | Colt Mild perf. Cams | Bosch BOV | XTD clutch | Tokico Illumina w/TEMS | ES bushings | 18" Pirelli P-zeros | Man AFPR | zeitronix wideband w/EGT probe | on-board race timer
vikenabm is offline   Reply With Quote