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Faulty VSV causes coughing on cold start


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I found that a broken plastic nipple for the Vacuum Switching valve (VSV) on the front of the air box caused coughing on cold start if the vehicle had been sitting a day or two.

At times it would not start first time at all.

It seems that some time ago, someone had inadvertantly broken the plastic nipple right on the air intake box - which can't be seen as the rubber hose covers the issue.

In my case, a mechanic had superglued the rubber hose to the box body without repairing the nipple, which is really impossible to glue without sleeving it.

Recently, enough was enough after taking it to my local dealer who couldn't replicate the problem, I had a shot at repairing it.

Using a piece of a stainless steel 18 gauge hypodermic needle (which had the perfect internal diameter), i drilled out the broken plastic nipple and the part of the air box then superglued the assembly - it sealed perfectly.

Some Inox on the rubber hose and the repair was done.

What I can't find is a repair manual for the TRD - even Grand Motors tell me that TRD don't supply one - how do they do their repairs?

I have attached a Camry Manual for the Intake control system - I coundn't find one for the TRD but the Camry is the same.

If there is a repair manual out there please post

Toyota Vacuum Switching Valve.pdf

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