u/CopiRightPlayer

1992 MR2 Mk2 3S-GE

Context:

A couple weeks ago the car was running fine until the engine quietly died while I was coming up to a island. I say quietly due to the fact I didn't even realize until I tried applying power until I was exiting. I pulled off and the car was in a No-Start situation. Immediately after I got the car home, the after-market LazerLine immobilizer stopped working, now causing a No-Crank-No-Start situation, this was resolved by removing the immobilizer.

I found that the EFI fuse was blowing, causing the No-Start. This was due to a bad Lambda sensor which I have now replaced and now I am dealing with this misfire.

I have had the car like this for less then a week, and have been doing a couple other things to it (non engine related), hence why the CAT is off in the video. However, I can confirm that the engine was misfiring before this and while the exhaust was intact.

What I know:

Fuel:

There is pressure at the rail, and the injectors work. I know this as I have taken them out, tested and cleaned them after the misfire presented. If the problem is fuel related then it is due to how the Injectors are being driven.

Spark:

I've swapped the spark plugs around, compared the lead's resistance with a multi-meter and pulled the leads out of the distributor one-by-one and seeing a spark on them all.

Compression:

Haven't tested compression, but oil and coolant aren't mixing and there wasn't a boom when the engine first died.

Air:

I have fitted a new filter in the last week, but the misfire presents with or without the filter.

I haven't dealt with a misfire before, in fact I have little to no experience working directly on Engines, however I find it really hard to tell which piston the misfire is presenting on as I pull the leads (as seen in the video).

This makes me wonder if it is a timing issue, maybe caused by the crank/cam sensor, however if this is the case then that would mean 3 independent electrical faults appearing simultaneously (Immobilizer, lambda sensor and potentially the crank/cam sensor). I know the car is old, but in the 10 months I've had it it hasn't had electrical problems, so this some serious horseshit.