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Thanks for the tip 10/10, and I think your "right on" -- sounds like you have a lot of mechanical knowledge. I would think it's something like what you say - idle air control valve, vacuum leak etc ?
I'm hoping to find someone with an "expensive" code reading machine, that will diagnose everything, as sometimes the cheaper ones do not, from what I read.
Probably the $ 40 one or thereabouts would be OK as you say, then you plug it in under your dashboard, on the driver's side, as I understand. I think service stations charge you $ 200 to do this. ( rip off)
I guess I should do something, because like any problem, it will only get worse if you ignore it. This has been going on for about 2 years, and stays the same, but I should have this fixed.
Maybe I'll get lucky
and a mechanic on here, will do this for me, at a reasonable cost, which I'd be glad to pay.
Bye the way -- I'm not that mechanically inclined, but I looked into those diagnostic instruments, and they run from $ 40 right up to about $ 800 bucs for the most expensive ones. Not quite sure what to think ?
Thanks for the reply 10/10, and your quite likely right -- idle air control valve, sounds very very possible, or EGR malfunction.