RPM fluctuation

[mountainman]

Originally Posted by Gelbster

test the AOS with a digital manometer "Pyle" all in Search .Look for 5" or less iirc.

afraid I don't have access to one. Probably just change the aos since I do have one. I also took the resonance tube off and there was some oil in there as well. The current aos has about 30K on it, so I have probably got the best out of it. Now I have to figure out how to get the lower flex hose off, I can't get my hand in at an angle where I can push the release tabs. Not the very bottom one, I have the special pliers for that one

[Gelbster]

Try the hand on the oil filler tube test?
A digital manometer on Amazon/Fleabay is $30 .I got my Pyle for $20.Beats a needless AOS replacement job any day !
And a new AOS may be defective.

[mountainman]

Desided to go ahead and replace the aos since it already had upward of 30K on it and there was some oil in the intake. Finally figured out how to approach it for the best angle and it wasn't too bad. If you are right handed you can approach from the driver's rear fender and slide up over the engine and you can slide your right hand down the back of the engine and across to the aos and it is easy to push the release on the middle breather tube and slide it off. Then I just removed the 2 mount bolts and pulled the aos out of the bottom hose. Then you can access the clamp on that hose and remove it and mount it in one of the remote cable clamps for reassembly. Judging from the 2 hours it took me to change it, I would say the dealer is making about $500 an hour for their labor when you go to them. Haven't had a road test yet to see if it fixed the rpm fluctuation, but the aos needed to be changed and the intake and maf needed cleaning, so it was all necessary anyway.

[Gelbster]

Carry the old (good) one as a spare because if your AOS fails in the boonies on a trip ,you could wait days for a spare part
Also be creful with the hose connections - they get brittle and difficult to seal correctly.That will give you vacuum faults.
A digital manometer could have confirmed if the AOS was marginal/good.Save a lot of work !
Search "PYLE Meters PDMM01 Digital Manometer"