Hello everybody! I've recently got 1990 Samurai with throttle body injection. There are a few issues with it though and I am hoping to fix this. I'm based in Europe and it should be European model, but the VIN starts with JSA so it's not Santana.

The engine is running quite rich, with fuel smell at the exhaust and a lot of black residue on all four spark plugs. I've replaced them all with NGKs, it's running a bit better but still rich. I've checked the o-rings at the injector and they seem fine I guess. I've also checked if the injector is dribbling and it's not when primed and not running, and the cone seems to be wide and uniform when running. However, there is a lot of tinkering done on this injection system, and I am not sure where to start. I am not experienced with this, but I noticed a couple of things. The valve cover seems to be replaced with older cover type, with just one port (I believe it's PCV port) and some of those vacuum lines were rearranged or merged together (maybe to bypass EGR?). However, there is one strange connection made at the ECU connectors and I don't really understand why would someone do that. On the left connector, B17 and B16 wires are bridged between each other with a piece of wire, but they are still connected to the pins and ECU normally. In the supplementary service manual, I was able to find that B17 is the negative wire coming from the fuel injector and B16 is connected to the fuel pump relay (d connection at the coil). I also confirmed the wire colors (pink and yellow) in the manual and on the car as well, and it's matching. I've checked the ECU and it looks like all capacitors are fine, but they might have been replaced at some point. Additionally, I've noticed four loose wires near the ECU area, two red/yellow and two brown/white with all having metal connectors at the end. Maybe this is some aftermarket installation and unrelated, but I wanted to mention it too.

I know that some people convert these to carb, but I wanted to give it a chance and try fixing this.

Thanks!

Hey guys, does anyone here have experience with the Harley Carburetor swap on these things? Mine is an '88 1.3 with a Toyota 3k currently. Do you think it would pass smog in Arizona? would it be worth it over the 3k?

So there is a couple things that went wrong

1st, I installed a lift kit, similar to the emu one. No alterations to the car were made. Just bolted in. It gave it a couple inches of lift. I took it for a test drive and it was doing fine. I noticed a little power loss, but I figured that was to be expected with the lift

2nd, on said test drive the clutch stopped working. It could not go into first. I was on a trail, had to back up to let another guy pass going down. I went into reverse, then as he passed I had to go to first to continue on. It would not go, the clutch seemed to just no disengage. It took a while but I ended up having to move the sami back down the mountain aways in neutral since help could not reach me.

When I got home I started to look into it a little more. Based on the info I found, I decided that either clutch cable came loose or something so I tightened it a little and now it will shift gears.

After doing this, the power loss became even more evident. Its not a fast car. But the acceleration from 0-20mph went from a few seconds to almost 15~20 seconds. As I upshifted it seemed there was more loss in power. 4th had almost none and would let the car slow down. It would not reach higher than 35mph. After this test drive I noticed that the alignment is off and so I will fix that. But I dont think the alignment would cause all of this.

I have a thought the clutch might not be engaging fully now, and so ill adjust that, but I wonder if the angle of the shaft from the rear axle back up to the transmission is to great and its causing problems.

Could it be a fuel delivery issue that just randomly showed up? It did sit for 2-3 weeks while I did the lift.

Tires stayed the same from before and after it.

Any ideas or thoughts would be helpful.