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pimp cauldron
08-07-2018, 02:05 PM
Over the span of a couple weekends I replaced my valley pan gasket, all the intake manifold gaskets, and the upper timing cover gaskets. After bolting everything back together the car started and ran, but had a rough idle which was pretty easy to tell was a massive vacuum leak.

After poking the engine bay I discovered the two small open ports on the back of the CVV. I found a couple of vacuum plugs in my toolbox and after fitting them the car idled smoothly. The problem is I don't remember any plugs or vacuum lines going to these ports. From what I can tell my car has a remote mounted fuel pressure regulator rather than one located on the fuel rail. From what I understand some year models get a vacuum port from the CVV to the FPR.

Can anyone confirm both of these ports should be plugged? After plugging them both I have an SES light, but I'm hoping it was prompted by the vacuum leak and will go away after a bit.

JimLev
08-07-2018, 07:22 PM
You probably got a CCV for a tu engine that came without plugs.
Did your old CCV have plugs or the ports blocked off?

edjack
08-08-2018, 04:40 PM
AFAIK, a vacuum leak, per se, will not cause a CEL.

Your regulator s/b mounted on, or near, the 3/2 valve assembly. See item 3: https://www.realoem.com/bmw/enUS/showparts?id=DE63-USA-01-1998-E39-BMW-540i&diagId=13_0630

pimp cauldron
08-08-2018, 10:46 PM
Thanks for the replies.

I do not locate the FPR anywhere in the engine compartment, unless it's on the driver side well below the quick disconnect fuel lines.

I did not replace the CCV when I did all the gaskets, I just removed it from the manifold. But Jim, I suspect your theory may be correct. I have only owned the car for a few months and a PO probably did replace it.

geargrinder
08-09-2018, 10:12 AM
That RealOEM "location in car dot" is wrong, the 3/2 on the M62NV is gonna near the filter, which be down under drivers butthole, I think Philly posted some pixorz of his once (his 3/2 , not his butthole :crackbutt).

Here's a shot from a 528i. Should be same.

https://www.bimmerfest.com/forums/attachment.php?attachmentid=338150