vacuum test help

4.2 V8 32v Naturally Aspirated - 414 bhp
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Starry
4th Gear
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Re: vacuum test help

Post by Starry » Wed Aug 24, 2016 7:21 pm

Did a little test today with the 2 pipes that go down the front of the engine. As you stand In front of the car, the right one has been blanked off as this one operates the inlet manifold flaps and am I think I'm right in thinking the left one is the supply. I put a vac gauge on thecsupply and on tickover it was holding a constant 0.6bar this increesed when I raised the revs. As soon as I killed the engine this dropped to zero in seconds. I didn't blank the airbox or the exhaust flap pipes as by unplugging the supply to fit the gauge I assume they are out of the loop.
2006 RS4
Phantom black
MRC Stage 2, Milltek non res, pre cat delete,
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jonson66
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Joined: Tue Aug 09, 2016 5:40 pm

Re: vacuum test help

Post by jonson66 » Wed Aug 24, 2016 10:59 pm

Starry wrote:Did a little test today with the 2 pipes that go down the front of the engine. As you stand In front of the car, the right one has been blanked off as this one operates the inlet manifold flaps and am I think I'm right in thinking the left one is the supply. I put a vac gauge on thecsupply and on tickover it was holding a constant 0.6bar this increesed when I raised the revs. As soon as I killed the engine this dropped to zero in seconds. I didn't blank the airbox or the exhaust flap pipes as by unplugging the supply to fit the gauge I assume they are out of the loop.
What you want to do is blank off all other components tied in to the vacuum line your testing the vacuum on and pull a vacuum with the gauge and see if it holds a constant vacuum. If it does you know the vacuum lines are ok. All you need to do then is test the components and solenoids.

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Starry
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Re: vacuum test help

Post by Starry » Wed Aug 24, 2016 11:22 pm

What I'm going to do is just tee in to the vac system and keep everything still connected up. After I kill the engine I'll see what happens..
2006 RS4
Phantom black
MRC Stage 2, Milltek non res, pre cat delete,
Image

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Starry
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Posts: 777
Joined: Fri Jul 15, 2016 9:42 pm

Re: vacuum test help

Post by Starry » Thu Aug 25, 2016 10:40 am

Spoke to MRC and the car is going back to them on the 5th to get hopefully sorted. Fingers crossed its something simple....
2006 RS4
Phantom black
MRC Stage 2, Milltek non res, pre cat delete,
Image

jonson66
2nd Gear
Posts: 141
Joined: Tue Aug 09, 2016 5:40 pm

Re: vacuum test help

Post by jonson66 » Thu Aug 25, 2016 11:05 am

Hope you get it sorted mate

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