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I measured a resurfaced stocker at 18.5lbs on a bathroom scale.

The 2JZ harness is far from plug-n-play for the MKIII Supra. Nothing matches up. You need a 7M harness (doesn't matter if turbo or not) that fits all your dash plugs and engine bay plug. Then, the 7M harness will be spliced into the 2JZ harness so the 2JZ can get power and work like normal.

Boost/fuel cut has nothing to do with your fuel pump or injectors.

You should research more about 1JZ swaps before you give others information. Proper grammar would be nice as well. Emeraldage, any 2JZ W58 flywheel will work fine. You will also need a 2JZ/W58 bellhousing.

Check the length of the tensioning spring...

The line/tube from the throttle body is a controlled leak under boost through a small oriface connecting to the inside of the intake manifold. When I was single'd, I put check valves on both sides of the line and plumbed the intake manifold instead and capped off the throttle body fitting.

It's not that hard to make your own boost leak tester with PVC pipe and some air fittings. If not, Speed Image is in Lakewood near 6th and Union.

Stock is 10psi.

How does that help the OP?

The O2 sensor should have a plug that connects to the engine harness. If not, any 1993-1995 Supra turbo OBDI upstream O2 sensor will work. Behind the A/C compressor is the 1JZ's oil pressure sender. Remove the A/C compressor and then remove the sender. The DM line screws into the old sender's hole.

MKIV turbo (2JZ-GTE) injectors are 550cc side feed (JDM's are 440cc) and will not fit the 7m fuel rail. MKIV non-turbo (2JZ-GE) injectors are 330cc top feed and will fit the 7M fuel rail.

There's two 2-wire coolant sensors on the waterneck you'll need to swap out as the plugs are different between 87-88 and 89-91. Either swap them or splice the plugs/pigtails into the 87-88 harness you find.

What kind of towel performance gains are made with a TRD towel bar?

#1 & #2 bolt to your intake manifold. #3 if it goes to your negative battery terminal, bolts to your block.

Don't forget adequate venting or the coils will cook.

You need the turbo engine harness, turbo ECU, turbo ignitor, and turbo driveshaft to swap into your 86.5 chassis. The pressure plate only has 6 bolts but you only need to remove the clutch fork to get the transmission to separate (after removing the transmission/block bolts). Please use...

Yes! Usually when there is a fault with a sensor like that, a default value is substituted which would be a value when at normal operating temps. Fix the error code/sensor issue.

But the 1JZ still has a better processor and can overclock with ease. :biglaugh:

+1, these cars force you into learning/tearing everything apart. If you cut corners or cheap out on parts, the car will show you no mercy.

Have you checked the 5amp fuse in the driver's kickpanel for the battery?