Best way to identify source of fuel leak?

[jgilber0]

I didn’t have any leaking of gas on our cars, but, it was easy to buy 10 feet of new fuel line and replace the feed and return lines. Under the car there should be hard fuel lines that terminate inside the driver side frame just under the steering shaft u joint. The new rubber should route up and through the intake manifold and then split where the supply line goes to the fuel rail and return line from the pressure reg. For less than $30 you can just replace with new lines and clamps.

Agree. And you should do this sooner rather than later as there is risk of fire.

It took me about 2 hours to replace all of my engine bay fuel hoses, I suspect that others could do it faster. Not a big investment in time or parts for a big improvement in safety and peace of mind.

[325e '87]

I didn’t have any leaking of gas on our cars, but, it was easy to buy 10 feet of new fuel line and replace the feed and return lines. Under the car there should be hard fuel lines that terminate inside the driver side frame just under the steering shaft u joint. The new rubber should route up and through the intake manifold and then split where the supply line goes to the fuel rail and return line from the pressure reg. For less than $30 you can just replace with new lines and clamps.

[AC_Schnitzel]

Nice. I'll check out a bunch of lines near the fuel rail and fpr.

[jeffnhiscars]

The return line from the fpr is the only one on that side towards the front of the engine but it's the least likely to leak from sitting. If it's wet on that banjo can't you trace it

[AC_Schnitzel]

It’s unclear of where it’s coming from, and only happens when the car sits for a longer period of time (weeks).



The fuel is dripping from somewhere and making its way down to this line. (View from underneath the car facing the oil pan from in front of drivers side tire)

After the car runs for a bit, if I shut off and start again, the fuel stops leaking.

Which fuel lines run around/above the PS line?


Any thoughts?


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