ajsellors
A2OC Donor
Strange question, perhaps?
I'm trying to get to the bottom of my Long Term Fuel Trim Additive Air System too Lean error.
I have performed a smoke leak test and fixed the small leak off the inlet due to my oil separator hose not having a clamp on the connection. That however should not really play a part as its before the throttle.
https://www.a2oc.net/community/index.php?threads/aua-oil-separator-clean-or-just-refit.37528/
The only other leak was from the EGR valve breather pipe.
This leads onto the question, what's the real purpose behind the small dangly pipe on the petrol 1.4 EGR valve?
The A2 1.4 petrol engine self study guide describes the vent pipe as for pressure equlisation inside the valve. I can understand that as the parts move inside and as the external air pressure changes you need to equalise the balance of internal and external atmospheric pressure.
What that would also lead me to understand is that this vent should not be connected to the engine air inlet and therefore also not allow extra air to enter the intake system (after the throttle).
My leak test showed that there is the ability of air to move between the atmosphere and the intake through this pipe. When the engine is idling, the pipe sucks quite hard. Hard enough to hurt if I cover the filter on the end of the pipe with my hand.
So the question, should the engine suck air through the EGR breather pipe? If not, is my almost new but obliviously out of guarantee EGR valve broken, again?
Any advice would be appreciated.
Andrew
I'm trying to get to the bottom of my Long Term Fuel Trim Additive Air System too Lean error.
I have performed a smoke leak test and fixed the small leak off the inlet due to my oil separator hose not having a clamp on the connection. That however should not really play a part as its before the throttle.
https://www.a2oc.net/community/index.php?threads/aua-oil-separator-clean-or-just-refit.37528/
The only other leak was from the EGR valve breather pipe.
This leads onto the question, what's the real purpose behind the small dangly pipe on the petrol 1.4 EGR valve?
The A2 1.4 petrol engine self study guide describes the vent pipe as for pressure equlisation inside the valve. I can understand that as the parts move inside and as the external air pressure changes you need to equalise the balance of internal and external atmospheric pressure.
What that would also lead me to understand is that this vent should not be connected to the engine air inlet and therefore also not allow extra air to enter the intake system (after the throttle).
My leak test showed that there is the ability of air to move between the atmosphere and the intake through this pipe. When the engine is idling, the pipe sucks quite hard. Hard enough to hurt if I cover the filter on the end of the pipe with my hand.
So the question, should the engine suck air through the EGR breather pipe? If not, is my almost new but obliviously out of guarantee EGR valve broken, again?
Any advice would be appreciated.
Andrew
when maintained by a good owner rather than the usual condemned as gutless rubbish. All it takes is a thorough service and attention to detail like you have done to release the horses. I doubt it's any accident that so many 1.4 petrol cars were sold as they were perfectly adequate cars to drive when new. Ours was running well enough but the Terraclean transformed it in the low rpm throttle response and throughout the rpm range.