My father bought a 1995 E-320 off the Lot and put 350,000 on it. He then finds an Engine with 60,000km's on it and has some people r&r it. Then like a bat out of hell this problem comes and cripples the car and he gives it to me.
The problem started and got wore and worse.....
First it was driving fine then one road trip, I was going highway speeds and hit this hill and the car just choked like it was going to quit, then power came back and then it choked, then it quit and then it fired up

. Then it worked fine and 3 hours later I was pulling into my home town and it started doing it again at stop lights. Like it was going to quit, then just when you think it's dead it comes back. I ended up putting it in neutral and keeping the rev's high to avoid it. So it sat for a week or so, then I went to drive it to diagnose it and it then started up another problem; It won't rev over 4000rpms hot or cold!

It hits 4000 and like you hit a governor of sorts it just won't go higher. So I let it cool down; when you drive it cold, it drives normal except it wont go over 4000rpms. When its warm, all of the sudden you can floor it and the car doesn't go! The engine revs but the car doesn't respond with any pick-up. I don't know what's going on.
I've been reading the threads and I have checked the wiring harness under the hood and it all looks good. Where do I start? Is it the throttle actuator? Any help would be greatly appreciated.
Thanks
Billy