I have been working on the 88/245 wagon for the past two weeks,I pulled the head off to seat the valves new valve stems seals new lifter cusions.Then I went ahead and did a port and polish on the head that took awhile.I put in a B cam and cut the compression on the head back to 8.5 compression so that I could add a turbo later on.The engine always had a slight skip to it and after all that work still had the skip.For the last two days I have been after the skip and finally got it.The throttle body was the answer the rubber sills on the shaft was the problem.When I bought the car there was a small bag of rubber sills in the glove compartment that I didn't know what they were for till I took the throttle body apart.The car now has a idle that I can live with.The B cam makes it idle alittle rougher than the M but now the car rives alot freer and the power is a lot more than the stock engine.The moral of the story is that if you have that small skip at idle look to the throttle body sills.That may be your problem also.
Thanks
Rodney

Hi,

My 1990 B230F might have that skip that you are talking about. You mean the rubber seals of the throttle body were worn out thus leaking air through it?

Thanks,
Yen
--
1990 244 DL

Yes the shaft was leaking air and the AMMwas trying to make up the difference
Rodney

How did you change these?

You will have to take the body off first. Then remove the butter fly,two small screws hold it.Then take the TPS off two 3mm hex screws hold that.The large nut on the end with the spring needs to come off next.Behind the spring is the main seal and behind the TPS is the other.Give everything a good cleaning when it is all apart.Check the vacume hose fittings to see if they are stopped up and you will need the Oring for the black plastic idle knob also.I hope that this helps, post another message if you need more help.
Thanks
Rodney

Where did you get the throttle shaft seals? Dealer item?

They are a dealer item, The parts # are in the FAQ's the one's that I got were in the glove box when I bought the car I just didn;t know what they were for till I took the body apart and remembered where I saw those seals.The part # are #1271488 #463766 #947114 these #'s I got from the FAQ's
Rodney