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The family 98 V70 GLT had felt a bit off lately. Subtle hesitation when accelerating from a stop, a bit of crunchiness to the throttle when just cracked open. A couple days ago it really started misbehaving at very low throttle, with a bit of surging/wobbling when creeping forward. Idle regulation was sloppy, dipping down quite a bit when put into gear before jumping back up.
It had been 3 or 4 years since the last throttle body clean, so I picked up some cleaner spray and took the hoses off. Throttle wasn’t too dirty, but the idle air control valve was flopping around loose. I unhooked the connector to give myself a better angle on the throttle body, I saw all three pins were fuzzy green with corrosion.
When I took off the IACV to give it a hit of the TB cleaner spray and scrape the contacts, I found two rectangular gouges in the upstream hose.[IMG]http://i.imgur.com/bHPkg0q.jpg[/IMG]
One of the holes went all the way through, upstream of the throttle but skewing the MAF reading at idle and low throttle and leaking some boost under load.
[IMG]http://i.imgur.com/JUD9e4p.jpg[/IMG]
The IACV attached to the manifold near all the other main vacuum lines. One of the larger lines was attached with a hose clip. The prongs of this clip had punched through the hose as the IACV was flopping around.
[IMG]http://i.imgur.com/6Xp0tyU.jpg[/IMG]
I blocked the hole with some self sealing silicone tape, cleaned everything, put some dielectric grease on the connector and put everything back together. Extra silicone tape served to pad the IACV, and a pair of zip ties clamped it back in place so the hose can’t rub against the clip anymore.
[IMG]http://i.imgur.com/rg1mYao.jpg[/IMG]
Car runs like new again with tight idle control and good throttle feel/response. B)
Anybody else run into something like this? Missed it until the problem kept coming back?
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