PCV hose and Check engine light before start - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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Old 02-23-2012, 10:55 AM   #1 (permalink)
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Default PCV hose and Check engine light before start

Hello, everyone,

My car is a 2003 Mazda6 with V6. Last Nov., I found the hose linking to PCV valve collapsed together with some vacuum leaking sound; I changed both the valve and the hose. Although some vacuum leaking sound was still can be heard from somewhere, it was smaller and the hose stays fine. But recently, I found the hose collapsed again. It's not broken yet, just collapsed. Vacuum leaking sound is again noticeable. Does anyone know what would be the reason for the collapsed hose?

Another problem is that before starting the car my check engine light would blink for about 10 second. It will die out after the car is started. I'm wondering if this blinking is indicating something.

Thanks for any reply in advance...
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Old 02-23-2012, 11:23 AM   #2 (permalink)
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you probably have a different line leaking air.

either at your

Fuel pressure regulator
Brake booster
EGR
EGR check valve
air actuator valve
intake boot

The blinking sounds like the standard blinking the car does when left @ key on, but you can take to a auto parts store and have it checked.
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Old 02-24-2012, 01:44 AM   #3 (permalink)
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Hi, flipper66, thank you for this quick response...

I'll try to find the leaking part. Is there any suggestions on how to check the leaking?
An Do you also mean another leaking hose is causing the PCV hose to collapse?
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Old 02-24-2012, 10:57 AM   #4 (permalink)
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no the hose collapse is the hose being junk.

the best leak detector is either listening for squeeks or spraying the lines down with carb cleaner.
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