I am going threw the same issue except i have a 87 with a N332 and still low impedence injectors, but I can drive mine for a minute then it won't rev, but if I shut the key off and re start, it is normal again but the cycle continues .

 

Ceramic resistor pack appearing to be connected...

 

hmm, i'm still wondering what impedence injectors are in the engine, with the resistor pack it would need the low impedence '87 injectors but has a swapped ECU since it is an '87 model(it will still work but someone has been swapping parts around).

 

the Ecu sees HI Impedance anyways.
both the 332 and 333 were meant to see that.
the only difference is the Resistor pack and injector impedance.
Add the resistors and LO's and get HI.
just the HI's and get..HI.

 

well that air filter could be part of the problem, i bet that thing weighs 5lb with it soaked in dirt/grease.

 

Well the injectors are so buried that I'm not attempting to take everything apart to check them out, especially since it looks like it hasn't been touched in over two decades. I put in the 87 ECU and hoped for the best. It feels like that did the trick. I can't take it for a test spin since the car is slammed too too low. I can't even make it out of the driveway.

 

Ok so the right ECU definatly did the trick. And after doing some rim / tire swapping & rolling the fenders, I was able to take her for a spin. The car drives really nice so long as I stay very light on the pedal. As soon as I try to get into the pedal and the boost gauge sees 10 psi (I think) it sputters.

Also start up gives me trouble. She starts but not what I would expect FI to act like. I have to get her warm before I can step away from playing the pedal and then she's idling at 1500.

 

Actually I just took her for another ride and she's fine if I slightly give throttle even way into the stock boost gauge. Any more pedal and she stutters. Start up, warm up and idle are still a mess. Even if someone throws me a guess I'd have somewhere to at least start....?

 

sounds like a pressure sensor issue or secondary injectors not coming online. you can get some boost off primaries only but any heavy loads requires all 4. in fact it sounds like your whole fuel system is a mess and may simply be low fuel pressure.

 

Maybe I'll put a fuel pressure gauge in line somewhere to see what the fuel pressure is reading...??

 

So I put a fuel pressure gauge in line after the fuel filter and ran the line up to the windshield so I can see what its doing while driving. Idle is at 30psi steady (still @ 1500 rpms tho) and when driving she stays at 30psi even under boost according to the stock boost gauge. Defiantly feels like the secondaries are not being feed fuel.

A few pics...

 

30psi is low for under boost but it should still rev, just run a little on the lean side.

the secondaries are fed the same fuel as the primaries, the issue would be the injectors themselves either stuck or not being turned on by the ECU either through a bad power feed, ECU input issue or a wiring issue to the injectors from the ecu/ground.

 

Ohhhh boy. Sounds complicated.

 

start by checking the ground strap on the rear rotor housing. there is 2 black wires attached to a ring terminal, one leg feeds ground to the ECU for the primaries and the other for the secondaries.