thomasthunder46
Peugeot 607 vacuum leak
Summary of the thread
A 2001 Peugeot 607 owner is experiencing issues with the check engine light, idle problems, and occasional engine stalling, suspecting a vacuum leak related to the air valve. The problem is likely due to a faulty hose connection from the pump to the valve. A suggestion is made to perform a smoke test to identify leaks, but ultimately, replacing the suspected degraded hoses is recommended. The owner follows the advice, resulting in the discovery and replacement of a split hose, resolving the issue.
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4 comment(s)
thomasthunder46 (community.author)
I had a quick look at the hoses, but didn't hear any hissing. Is there a foolproof way to properly check them for leaks, short of replacing the entire lot? I'm trying to avoid that if possible!
norberthuber4
A smoke test is the best way, but you'd need a machine. Given your mileage and symptoms, and the fact that you suspect the hose already, it's likely degraded. Honestly, for the sake of your sanity and the car's health, I reckon just bite the bullet and get them replaced. It'll be cheaper than chasing ghosts. Take it to a trusted workshop.
thomasthunder46 (community.author)
The advice was spot on. Took it to the garage, and they found a split in the hose, just as suspected. Replaced it, and all's well. Cost me 175€, but she's running sweet as a nut now. Appreciate the help!
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PEUGEOT
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607
norberthuber4
Sounds like a vacuum leak. Have you checked all the vacuum hoses connected to the intake manifold? A faulty hose can cause fluctuations in manifold pressure, triggering the check engine light and causing idle issues. Any hissing sounds coming from under the bonnet?