Question guys why would the car run rough when it gets warm. It runs all fine until it gets warm and engine will start shaking and the exhaust rattling. Would that be the sparks or perhaps the injectors? I have no idea I feel it’s more a spark thing. I’ll look at the vcds if I get around to it but for a general idea does anyone have insight on this?
The cooler it is outside the smoother it runs
I have no idea I wonder if I should get that liqui molly injector cleaner and see if that makes a difference
Use VCDS and log for misfires. Start it when cold and watch it as it gets warm.
Ed
Think I found the problem a very oily spark plug I found when I removed it
If you haven’t done a compression test, you might want to.
Ed
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Hey guys we are back here again so the shake is definitely air related I fixed one part of the leak and it’s a bit better. Now I hear the leak coming from the passenger side from behind I assume it’s this hose here
I don’t know what else it can be
I’ll do that when I get the chance too
It’s definitely not the gasket between manifold and throttle body housing it’s a new gasket
That hose is $86 at the dealer! Total rip. I did a brief write up on it here Failed NEW Intake Mani -Rev M and here
Audi C6 S6 v10 Info Dump
Yours circled is the drain hose, mine was in ok condition so i cleaned and re-used it with a new clamp on the engine side. It could also be the pvc hose that has a check valve in it that goes from that same location on the engine to the passanger side intake hose.
If your hearing air escape it could be that hose PN 07L103217B, your oil seperator, the o ring where it connects to the IM heater, or the o ring where the IM itself connects to the “IM heater” part also.
I have a feeling you need to check the hose PN 07L103217B
Try blowing and sucking and make sure the check valve is working. You can access the end where it connects into the pass side air intake hose
Picture for reference. My oil drain return hose was leaking lightly so I replaced it with a worm gear clamp. Hope it works for me. Right next to it is the PCV hose
The oil separator is new but I bought another one to see if that eliminates the problem before I start jumping to the other things
If you haven’t I’d recommend OEM for the separator. I went with a cheap-o from eBay initially (was the first and last non OEM part I’ve purchased) and it was fine for about a month or so before I mysteriously developed a lean condition and eventually a very high pitched whistling sound that after reading this post from the Ross-Tech forums I coughed up for the OEM and haven’t had any problems since. Thought it was worth mentioning.
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Shit probably that’s it. I bought a $40 one off of fcp and with there lifetime warranty I didn’t think much of it when this new $40 one comes and it starts working I’ll buy a oem one
If it’s from FCP I’d probably trust that over eBay but even still might be worth a shot.
I remember when I got car ran fine but all o2 sensor shit happening made me not think about the vacuum leak it could be that I barely even used it. I’m going try that and if it continues I’ll remove the manifold and check hoses there
In the cold the air leak is worse it really makes the car run rough
The OE seperator cost me a smooth $285. Audi parts are expensive like an aston
