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Well, you mentioned the fuel distributor was replaced- If the "new distributor" was not so new it could have plenty of problems: The pin that is lifted by the metering plate is very sensitive... If it was ever dropped, or dinged, throw it out. You dont say if this problem occured before the distributor was changed, or was that done as a solution?
The first thing I would check is the control pressure regulator/warm up regulator. It is mounted on the head, just ahead of the distributor... Most of K-jet's problems stem from that. There are two screens where the two fuel connections come in that easily clog. If this were my problem I would start with throwing a spare control pressure regulator in and seeing what changes. You can easilly disassemble it- they are most often really rusty inside. Pop it open, flex the bi-metal strip a tiny bit to see if it is not trash. Put it back together carefully- If you dont get that little pin lined up right it wont run too well.
I would also strongly urge you to eliminate all chances of vacuum leaks- The symptoms you describe have some parallels.
Take your fuel filter off again, and blow through it backwards- if you get nothing, good. If you did anything in the fuel tank recently, you could have broken lots of crap loose and quickly clogged your new filter; this is not likely the cause as you listed appropriate fuel pressure, but it doesnt hurt to eliminate every possibility. Triple check those vacuum lines. The little black enrichment doodad that is mounted on the radiator has one vacuum line going to it, an two electrical connections at the bottom- Take it off and blow/suck through it. If you can, it is trash. I really dont expect a vacuum leak could cause all this trouble, but it might be a small contributor. Oh wait- this is not your 900 turbo... forget that part. Well, less vacuum lines to worry about in that case!
Back to fuel: Did you replace just the distributor, or the whole assembly with metering plate? Some distributors work with some metering plates, but not all. Confirm the new and old are identical by checking the number plate on the side. Any chance one line got crossed and put in the wrong place? Again, I dont know if your problem started after replacing the distributor or not. Did you check the gap on your metering plate? Was it moving freely? It should bounce a few times if you pick it up and drop it... The only the fuel distributors ever really go bad is when they see water in the fuel system. (i.e. extended storage...) The metering plates occasionally get gummed up and get sticky.
Ok, let me know if any of this helps, and what you discover. Keep us posted.
Craig R.
posted by 24.19.50...
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