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Just finished a engine swap installing a used low miles jdm 7m gte, and although engine runs well, I get amazing blue smoke from exhaust. Prior to install I pulled the head and replaced guide seals and the bores still showed crosshatch and no ridge, so I think the fault is with the turbo. Stock...

Just finished installing used turbo engine (jdm) and it smokes worse than any engine I have ever seen, mostly upon accell and decell. I had the head off, bores looked excellent (still showed cross hatch, no ridge) replaced guide seals and re-installed with arp bolts. I'm new to turbos, but have...

Just got my engine swap project to fire up! Kowabunga dudes. Thanks to everyone that has helped with cheap parts, great tech advice and Push's avatar. Still have a few tech issues/parts needs and will continue to be SM regular user. Now that I'm running maybe I can help someone else doing JDM...

Thank you guys for the great info, RF

1 Just swapped 89 jdm turbo engine into 87 n/a body and the new engine has no EGR system, so I wonder if anyone has a jdm vacuum chart? I could use EGR from old engine, but uncertain of total hook-up. 2 My oil cooler is pretty beat up, so wonder if it work well to route oil cooler lines...

Can't remember if I ever responded to you, so... I have bought an 87 m/t harness as advised by others as well as 87 turbo ecu. Splicing the jdm unit seemed ok until I got to the big shielded wires (knock sensors?) and realized getting the shielding right might be impossible. Problem now is I...

You do know these cars have independent rear suspension and are kind of sport cars made to handle, so why would anyone want to drive one in a straight line? Fast is fun, but why not the twisties?

price for 88 turbo harness? Ecu available? Thanks.

Yes, this helps very much. So many others have said run what came with your engine, or other rewire ideas, but sounds like you know the best answer. I will start shopping for correct parts and thanks for your help. rf

Thanks Jeff, but I did not give enough info. Bought a jdm engine with harness and ecu. Engine came with grey plug harness and ecu with all labels crudely scratched off. Car is 87 targa auto/na. Engine is turbo/auto but am using the big 5-speed. Have no problem adapting from auto to 5-speed, but...

If this info is already available on the site I have been unable to find it. I need to ID a jdm engine I bought in order to make sure I buy the correct engine harness. Engine # is 7M 0400925. Any Help?

No, no response from anyone on this issue which seems to come up quite often. My plan is to splice (lenghten) my jdm harness and try the ecu that came with the engine. Main concern is will the dash harness/instruments work? Several other projects have kept me from doing this, but soon, and I...

Ok sorry if I threw a curve ball. I have the old na harness and ecu (87 na/auto yellow plug harness, yellow plug ecu) and the new 89 turbo harness (grey plug automatic) and the grey plug ecu that came with the engine. Have already made neutral safety jumper as the grey plug harness came with the...

Thanks guys. I now realize I should have posted this in the special electrical section so many thanks for not busting my chops and answering anyway.

Bought a jdm 89 turbo to use in a 87 na and I know I have to splice harness for my left drive car, but can I use the grey plug ecu and harness that came with the new engine and plug into the stock dash harness without issues? One member has helped to the limit of his knowledge and thinks not...

Thanks for all the input guys. Done a lot of rewires over the years so guess I might as well give it a shot. I'm bet your right about cost vs time but at the moment time is cheap. I'll take pics for anyone who wants and post them in my album at rustfarmer's photos.

I have posted photos at rustfarmers' photos album. Questions are:10my jdm harness has an extra (?) small 3 wire socket the old harness did not have. Is this the wires to the clutch pedal start switch and if so does it need a jumper since I don't want this feature? 2) my jdm ecu has an external...

Ok and thanks for the info. I didn't mean heat and cooling mixed, but just that if the cut off valve is on the exit side of heater core instead of entrance I would expect hotter water to be in the core even when shut off. You are right, however, I just plumb the thing correctly and feel kinda...

Thanks very much for the info. I wondered if this might be the case, as the heater hose hook-up also seemed backwards. If I hook heater hoses up reversed, will I have hot water in the heater core all summer when trying to cool? Thanks again, RF

Sounds to me as if you have a bad starter solenoid or weak battery. Don't confuse voltage with amps, as you can have 12 volts yet so few amps available that the solenoid will click but still not spin the starter. You said you need to get a battery. Why? Could this be your whole problem?