While this might be considered by some to be a "tuneup in a can", I read up on this and decided to try it in my '74 with 140,000 miles. There's a product called "Kreen" made by the same company that makes "Kroil" penetrant. I added 1/2 pint to the crankcase and have run it for around 400 miles so far. What it does is it dissolves carbon very quickly, so if there is carbon buildup on the oil control rings or compression rings and lands, it will remove it and possibly restore compression or reduce oil consumption. Since adding it to my crankcase, I have picked up 200 rpm at idle, idle has smoothed out, felt an increase in mid-range power, and had my gas mileage increase 2 mpg. If your engine is clean, you would likely not see much benefit. Many that have used it have examined used oil filters for any evidence of increased wear, but to my knowledge this has not been an issue. The oil takes on a very dark amber appearance as it works. I'll be doing an early oil change and using the second 1/2 pint to see if it is done cleaning. Typically, oil changes stay clean longer after treatment as the rings seal better. I'm skeptical by nature, but so far I can't attribute the changes to anything else I've done on the engine. Just my .02....
Set the timing to 22 degrees BTDC, performance is better than before. Don't think I can do much more till I can get a carb, and get the cat removed.
that seems to be a whole bunch of initial timing that you have dialed in. i'm not familiar at all with 2.3 motors but, is this figure any where near normal?
You can probably do a good cleaning and rebuild on the carb instead of buying a new one.I would be very careful with any of these treatments. They're known to knock borderline gaskets (including head gaskets) loose, and increase blow-by on worn out rings. With a high mileage engine, sometimes that sludge is what's keeping it from leaking horribly.