Another Idle issue

[WormGod]

I would try to troubleshoot this one on your own. This problem is finicky at best and almost always inconclusive when you try to have a shop "decode" it. You tinkering away and getting your elbows dirty, one thing at a time, will yield better results. Like others have said already, start basic.

Clean MAF/check for induction breaches
PCV replacement
IAC cleanup
Fuel filter replacement
EGR cleanup (replacement?)

The ones that take a bit more elbow grease ....
FPR cleanup/replacement
Cam or Crank sensor replacement (VERY rare but I did have a crank sensor go bad and alter idle)
Manifold gasket

Chances are, 1 of these is the culprit. Hopefully it's one of the ones listed in the first list.

[housertl]

So I took it in, and the IAC was apparently not functioning at all, so it was replaced. More expensive than it could have been if I had done it, but faster than I could have gotten it done with my work schedule; it's my daily driver, and I would have hated to have to cancel my dinner date with my kid tomorrow night. The VX purrs now, fingers crossed that it lasts.

Thanks for all the advice, if I continue to have problems, I will start with the MAF and such.

[H3_VX]

I would try to troubleshoot this one on your own. This problem is finicky at best and almost always inconclusive when you try to have a shop "decode" it. You tinkering away and getting your elbows dirty, one thing at a time, will yield better results. Like others have said already, start basic.

Clean MAF/check for induction breaches
PCV replacement
IAC cleanup
Fuel filter replacement
EGR cleanup (replacement?)

The ones that take a bit more elbow grease ....
FPR cleanup/replacement
Cam or Crank sensor replacement (VERY rare but I did have a crank sensor go bad and alter idle)
Manifold gasket

Chances are, 1 of these is the culprit. Hopefully it's one of the ones listed in the first list.

I have just put all of these parts in my watch list on ebay JIC. At 78,000 miles should I have all of these valves (EGR, IAC, PCV) just cleaned or should I start replacing?