Jimny stutter

Let me introduce myself, I'm Bob from the Netherlands, I found a nice '99 g13bb Jimny a couple of months ago. It had some rust but the price was good so I bought it. When I drove it home the check engine light came on, a faulty lambda sensor, which I changed the week after and the engine light never lit up again.

The car really needed some service so I changed the oil+filter, plugs, distribution, airfilter, the standard stuff and it drove really well. However soon after the problems started. At half throttle it just won't go, at full throttle its not a racer but it pulls up to 90mph. At half throttle sometimes nothing happens and then suddenly it sprints away.

I've been reading these forums and quickly concluded it could be the camsensor, so that was the first thing to change but it didn't help. Fuel pressure was really low due to a faulty fuel pressure regulator, changing that sure made things better but still not good. I've double checked the timing on the belt and is good.

Problems seem to start when the engine is hot, there are no real problems when cold. And it revs up nicely when not under load. The fact that it does get up to top speed rules a lot of things out but right now I'm puzzled, I don't know where to start and I would really appreciate some assistance.

Welcome to the forum. As part of the service did you install new spark plugs leads and coil?

Yes I have

Ok. The crank sensor you replaced was it proper one from a reputable supplier, there are an increasing number of fakes on sites like Ebay?

It's not an original but from a good local parts supplier, is there any way to test it?

I'm sure there will be but I don't know what it is, probably a voltage or resistance change. Anyone know for sure?