Dave21426
Automotive
- Oct 19, 2011
- 47
I have noticed that some emission control smoke testers warn against using a supplied air source to test for leaks within the fuel system. They are afraid that the oxygen, as low as it is in air, with ignite some how with the fuel and blow up the car. They recommend an inert gas like argon. But lets see, in a modern emission control system the ccv valve opens up to to allow AIR to enter in the system to evenetualy purge into the intake. Not to mention, isn't air composed of 78% intert nitrogen.