Jim R.

Stan,

I replaced a functional idle switch during powder coating R&R with new, adjusted it to click just off the idle stop. It was adjusted to the maximum rotation allowed by the screw slots, and within a few weeks started losing contact returning to idle. I had to pull the intake again (getting quite good at it now!) and replaced it again works perfect. My symptoms were hard to start, erratic idle and stalling.......very unpleasant!

Just move the throttle quadrant by hand, listen for the click from the switch. No click, either adjust cables or R&R. I was able to get to mine by just lifting the intake up, not fully remove.....saved a bit of time there.

Checking the FPR is just pulling off the vaccuum line and see if fuel drips out. Probably not your problem...

Jim

worf928

Yes. But that approach is like playing the lottery. You win if the first or second part you throw at the problem solves it. By the time you get to the fourth, or tenth part you are likely losing both on time and money.

Genetic algorithms work well when the cost for each generation is very low.

Nightfly

Actually, for me, I kind of will be going Stan's route in many cases where the part isn't prohibitively expensive. I too want a reliable car; the vast majority of the parts on many of our cars are approaching or are greater than 20 years old, resulting in my beloved new purchase, though lovely, being a 'time bomb' no matter how you look at it. So when there's an option, and it's not outside of my capabilities, I'd rather replace stuff as I go. That way I'm at least pretty sure that part won't be the bad one in the future, and I'll be just a bit less likely to get stuck on the side of the road somewhere. I just look at it as part of preventitive maintenance.

Stan.Shaw@Excell.Net

Not really, since the parts I am replacing are nearly 20 years old and many are known to be common failure points. So, each part replaced decreases the probability of future issues and break downs.

So if I replace parts that are likely to fail, like the temp ii sensor, or perhaps are even just working less than optimum due to wear and tear, like an oxygen sensor, then there is still value to me. Every part changed is one less part to wonder and worry about.

This seems to be generally agreed with, as many would say a low mileage 928's value may often be exaggerated since plastic and rubber parts are still old and potential failure points just like a high mileage 928.

Stan.Shaw@Excell.Net

Correct, this is why when I had the intake refresh done, I replaced almost everything there, rather than wonder if it would need to be replaced next week, or spend money on having someone determine if it is good.

worf928

Don, Stan,

I don't disagree with the idea of replacing 20-year old parts as PM. That was exactly what I did when I got my '89. As long as you are approaching it from that standpoint - knowing that you might be throwing away good parts for peace of mind - then I'm on board.

The only caveat is that with anything that has an electrical connection, my experience has been that 50% of the time a problem with a sender is actually not the sender by the connections. So, when throwing away old senders make sure you clean and protect the connections for the sender at all ends (i.e. where the sender connects to the harness, where that harness connects to another harness, lather, rinse repeat, until you get to the ECUs, fuse panel, etc.)

Stan.Shaw@Excell.Net

That is my intent. I want a reliable 928, as my 80 Euro S was when it was my street car

I will probably go the lazy path here. Replace part and clean connection where it connects. If problems persists then check connections, or at least verify electrical status as per any specifications known.

If I have to deal with a $50 part to determine if it is good or not, when it is @20 years old and known to be problematic, then I will replace it. Checking the connections will vary from one part to another, some parts will be most easily checked when apart, others can be check afterwards (or if all is well ignored but remembered ).