All Things Mk5 > Mk5 General Area
URGENT oil pressure stop engine
Dan_FR:
Fuel trims should be as close to 0 as possible, but will vary depending on software and intake. An air / vacuum leak could account for surging at idle. Don't clear fault codes as this resets the trims and itll take a few miles at least to re-adapt
doylebros:
--- Quote from: Peskyjones on April 30, 2016, 10:30:51 am ---The surging can be really apparent from inside the car but impossible to record. I oculd hear it quite loudly yesterday in the car after giving it some beans. Ive listened to the video again and you really need to turn up the volume to hear it. @doylebros maybe give it another go? Remember its the last five seconds that you can properley hear it @Dan_FR do you know what normal fuel trim shouls be? Or is a case of requested and actual and ill be able to see myself.
Its the last issue on this whole topic, and ideally I really want to sort it haha. It might turn out thats its normal but I doubt it. Thanks.
--- End quote ---
I can hear the tone change in the last five seconds did it stay at the uplifted tempo or drop back?
MY NEXT MOVE
I would do the two bolts on the PCV first as we know that problem exists.
Remove the air box and check for any tiny cracks with a magnifying glass - they crack very easily when removing.
I've had a relatively new PCV act up once I've left it upside but that was a hunting fault.
r5gtt:
The noise seems to get louder but I'm guessing nothing major to worry about considering it's running and no warning lights are illuminated.
Pesky jones:
Ok. It is quite audible in the cabin. Doesnt do it all the time but after giving it beans It will definitely do it. It comes and goes, mainly at the same tempo but sometimes just the odd surge every now and again.
I will check fuel trims tonight, and sort out the pcv and check the airbox for cracks as you say @doylebros Am I checking the whole air box cover? Or just the part that contains the filter?
Thanks.
doylebros:
Whole cover :happy2:
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