The Kamikaizen Great Unpoochening

Kamikaizen

New Member
Authorized Seller
Joined
Mar 17, 2018
Messages
3
Likes
1
Location
Longmont, CO
#1
It's been a fairly long while since I introduced myself and my $1100 basket case. In that time I have been waging war against Previous Owner Repairs™and have finally come close to having an MA70 that's willing to be a car on a consistent basis.

So, onward with The Saga So Far:

threequarterfront.jpg
There she is in all her 30 years old glory. By some miracle the car was, aside from the rims and a crappily welded in cat, 100% bone stock. Forgive the stupid Dutch angle, I was exhausted at the time and I'm no photographer. :p

Turbo, slushbox, targa, and no ABS. This was the exact format I wanted aside from the gearbox, but that's an easy fix for the future. The exterior trim is a bit schizophrenic, yet it still had the lower front lip. However, the reasons it was $1100: The transmission hemorrhaged ATF to the tune of it being undriveable without going Mad Max with a barrel of ATF in the back and a hose going straight to the dipstick tube to keep it fed. It also had a ragingly persistent misfire at about 3400 at anything aside from WOT, and it had the customary valve cover and CPS o-ring leaks to ensure the front subframe was well lubricated. Also cruise control as well as overdrive didn't work, because there just weren't enough presenting issues.

So first order of business was the transmission. Right away after dropping it the first problem was obvious; whoever installed it didn't fully seat the torque converter, munging its snout as well as the oil pump. So I had the torque converter rebuilt, hunted down a fresh oil pump and hauled all of it over to my driveline shop for a much needed rebuild. In the meantime I went through the EWD to figure out the cruise control issue, since that is a feature I do want to retain. And luckily it turned out to be pretty easy: The trans isn't original to the car, as evidenced both by junkyard grease pen and the fact that the speed sender in the tail housing was the ABS 20 tooth square wave variety, whereas mine needed the sine wave speed sender. After sourcing the right one and slapping that in along with the fresh box and managed to get back that badly needed 4th gear. My trans shop even reflattened the oil pan's mating surface so an actual gasket works instead of needing RTV. Hasn't leaked a drop since.

What decided to evade my efforts to suss out was that misfire. One of the coil packs was basically close to dead, which surely wasn't helping matters. And seeing the cost of a 7M-GTE coilpack I opted to go IS300 coils for basically the same price as just on stock coil. Along the way I also found someone had injectors 4 and 5 backwards. But still the misfire persisted. I had the ECU rebuilt by lscowboyls on Facebook, since my policy on a used car is Trust Nothing. But that didn't fix the misfire, though I didn't really expect it to. The igniter seemed fine so I left that alone...mostly because the only new/remanned replacement I could find was $800 through NAPA. Eventually my sights landed on the CPS, which had an absolutely horrifying splice job done on its wiring instead of just fixing the plugs like a normal human being:

20180213 CPS fuckered wiring.jpg

So after seeing this I figured the whole CPS itself was suspect, and thus I threw it at my cheap oscilloscope and was greeted by a lovely, enormously lopsided waveform, in addition to it being about half the strength it ought to. Bullets were bitten and triggers were pulled on a remanned CPS, and after spending that much I figured another $5 on Driftmotion's CPS magnet wouldn't hurt any further. Slapping all that together I found a much more agreeable waveform, and after installation along with splicing in a new receptacle on the harness I finally fixed the misifre!

Happy boosting ensued. lol yarite. Instead I was greeting with all of 4PSI, but at least the damned thing was driveable...until the very day I took it for emissions and then the fuel pump decided at that moment it was ready for retirement. On the damned rollers. A bit of coaxing managed to get it to live long enough to pass, and then I immediately needed a tow back home. Which is the point I've been at since.

Current plans for the current issue are to get a mk4 TT fuel pump, a replacement gas tank because this one has a corner caved in, and because I am paranoid to no end I will be resealing the tank before it goes in. As well I'll be putting in a healthier CT26 and the fleabay CXracing elbow; which I had the gasket surfaced machined flat already. The compressor wheel on the current turbo is chipped more badly than a bag of Doritos and has enough shaft play it could sign on at a porn studio.

This 'build' thread isn't going to be terribly exciting for a long while to come, but it's been a wild enough adventure I figure it's worth documenting at least
 

plaaya69

87T Supra
Authorized Seller
Contributor
Joined
Nov 18, 2006
Messages
1,260
Likes
51
Location
Lake County, IL
#2
Glad to hear you are getting it up and running. You might want to go with a open mouth 1 piece downpipe like this style:

https://www.ebay.com/itm/86-92-Toyo...=item25a46bd23e:g:LN0AAOSwcwhVLIs-:rk:27:pf:0

instead of just a turbo elbow because you will notice way more pickup and a better exhaust/turbo sound (I have owned both in the past on the factory ct26). One of my favorite mods on my factory ct26 turbo was shimming the wastegate for a tab bit more power but I would only do that once you know the motor/turbo is healthy and running good.
 

suprarx7nut

YotaMD.com author
Authorized Seller
Joined
Nov 10, 2006
Messages
3,934
Likes
23
Location
Arizona
#4
Funny read. sounds like an adventure! I'm very near Longmont in case you need anything I can help out with, though it sounds like you're well on your way.

Good luck!
 

Kamikaizen

New Member
Authorized Seller
Joined
Mar 17, 2018
Messages
3
Likes
1
Location
Longmont, CO
#5
Surprisingly the stock BOV works! At the least it doesn't appear to be leaking when I tested it anyway, but I might just give myself some peace of mind and throw a Bosch recirculated valve on there in the near future. One small correction I did do is replace the check valve for the IAC. For reasons utterly beyond my comprehension that was removed at some point in the past. My eventual plans will be a full exhaust with a real downpipe instead of this autoerotic asphyxiation tube Toyota bequeathed this thing at birth, but that involves funds I won't have for a while to come. So this will be an incremental improvement.

And today also revealed something that now amazes me the turbo still worked at all:
20190112 turbo oil pipe clogged.jpg

Whoever monkeyed with the turbo last thought that using the stock gaskets were a good idea. So a GREAT idea is to RTV them in place! Right? ...right?? *headdesk* Farging icehole choked off the oil feed to a third of what it should be and I'm lucky a chunk didn't get swallowed...at least I hope there wasn't. At least they were consistent enough to do the exact same on the block side, so I got that going for me.

So on the docket now comes a softline kit because fffff, I knew the stock pipe was a bitch but mein gott that was more hassle than I wanted. Along the way I also discovered that the wires to one of the aircon pressure switches that run along here had its wires snapped off. And considering me and warm temperatures are not on speaking terms I would really rather have working a/c this summer, thus moar parts get thrown on the list for this beast hungers.

@suprarx7nut Thanks! I've actually been watching your Youtube videos. They've been quite helpful!