Leaking Fuel Pressure Regulator???

[91greg325i]

I just finished a bunch or top end work, and now when I start the car there is fuel leaking out of the FPR. I didn't replace the o-ring and when I went to check it, there was a little wiggle room. I'm thinking that is the problem. Does anyone have any other ideas as to what this leak could be attributed to? Or who agrees that it is the o-ring? TIA

[jlevie]

It should be obvious if the leak is from the seal as opposed to the FPR itself. Generally a bad FPR will fail to maintain proper pressure in the rail or leak fuel through the vacuum connection. But I have seen the body of an FPR leak from rust damage.