1992 mitsubishi gto NA 5 speed

Troubleshooting
1

Hello all my name is: Nik
I have a: (GTO 1992 NA 5 speed imported in 1999)

It has the following issue: was driving down the road. One of the coolant pipes burst off due to a rusty hose clamp and since the coolant went everywhere the car does not spark anymore. I believe it did soak either the coil packs or and PTU unit.

Now when it cranks, the rev counter doesn’t move at all. But all lights come on the dash fine. So its as if it doesn’t know its spinning or turning etc.

I have tried 2x different PTUs. One Chinese aftermarket one. And another original GTO one that came off of a running car.

I have tried an ECU supplied by Japattak. It was slightly different with the number on it. But did come from a manual NA car. (Potentially an MR variant or something)

It has an immobiliser but that disengages fine with the fob and allows me to crank the car.

This system comes with a little toggle switch in the foot well that is linked to the immobiliser and I have tried to flick it in different directions but still nothing.

I have not yet tried coilpacks or changing any of the CAS etc.

Not sure what else to try as was told to try diagnosing all the components first before lumping new parts at it.

Car is based in Reading RG2

Due to a motorbike accident 3 weeks ago my mobility is a bit restricted so certain tasks I cannot do.

Would appreciate any advice or help with it.

2

Highly unlikely that all 3 coils have gone, especially as they are waterproof. Have you checked to see if there is a spark when you crank it over? Start with the basics.

3

There is no spark which is the issue. So im trying to see all options as to why there is no spark

Some things I cannot do due to inability and using crutches.

So far tried new ecu and some PTUs. Tried new spark plugs

Im new to gtos so knowing what next is the mission

4

Since the area around the coil packs and PTU were soaked with coolant, and because the problem is affecting more than just one pair, I’d be focusing on the PTU and the electrical connections therein. Look for broken wires in the connectors to the PTU; also look for corrosion which could cause poor electrical connections.

Lastly, the PTU is also what drives RPM signal on the dash; so, again, this sounds like a harness issue and not so much a component issue.

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