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[Andy B]

Make sure the throttle butterflies are closing properly had the same problem. for some reason the butterflies were out of adjustment even though the had not been tampered with. Slight reajustment now tickover sits rock solid at just over 500 rpm

Thanks Tony, will do. 

[Debs.]

Make sure the throttle butterflies are closing properly had the same problem. for some reason the butterflies were out of adjustment even though the had not been tampered with. Slight reajustment now tickover sits rock solid at just over 500 rpm

  Hmmmmmm?!?!?

The pup-mobile is still suffering low/no/erratic idle problems; despite having a new (VX) cranksensor, a replacement (known good) IAC, a replacement MAF, cam-belt change and a new set of plugs......I also diligently cleaned the throttle-body and butterflies (which were a bit cruddy from the EGR flow) and the breathers.
I noticed there are now a couple of other (current) forum-posts outlining the same symptoms that Andy (and I) currently have; what`s going on?

[feeutfo]

Also consider air leaks.
 Perished or damaged breather hoses, vac hoses, seated plenum, plastic bridge seals aaall that stuff.
 Icv air feed just bypasses the throttle to do a more accurate job the main cable throttles can't do. It adjusts to suit rpm required. I dont need to tell you all that, but It's a tiny amount of air. Any other tiny amount of air getting in from a leak will have an affect. Revs go up, so the icv cuts it's flow to try and steady rpm, but it takes such a small adjustment it almost stalls so opens to raise revs and on and on it goes with static idle.

So Debs yours sounds like a possible air leak. Although as with Andys, my old 2.5 icv took several very good soaks in carb cleaner before it behaved, not forgetting the light oil. 

[feeutfo]

Also consider air leaks.
 Perished or damaged breather hoses, vac hoses, seated plenum, plastic bridge seals aaall that stuff.
 Icv air feed just bypasses the throttle to do a more accurate job the main cable throttles can't do. It adjusts to suit rpm required. I dont need to tell you all that, but It's a tiny amount of air. Any other tiny amount of air getting in from a leak will have an affect. Revs go up, so the icv cuts it's flow to try and steady rpm, but it takes such a small adjustment it almost stalls so opens to raise revs and on and on it goes with static idle.

So Debs yours sounds like a possible air leak. Although as with Andys, my old 2.5 icv took several very good soaks in carb cleaner before it behaved, not forgetting the light oil. 

...on and on it's goes with erratic idle! Erratic! I meant.

[Andy B]

When turning the actual valve inside the original there was a slight sqeak as it moved 

'New' IACV fitted with a little airline oil in it (best I could find other than 10W40    ) & so far so good. 

[Pete Elite]

When turning the actual valve inside the original there was a slight sqeak as it moved 

'New' IACV fitted with a little airline oil in it (best I could find other than 10W40    ) & so far so good. 

  Glad it was OK Andy .

[Andy B]

When turning the actual valve inside the original there was a slight sqeak as it moved 

'New' IACV fitted with a little airline oil in it (best I could find other than 10W40    ) & so far so good. 

  Glad it was OK Andy .

  thanks Pete