A month ago we installed a walbro 255lph hp pump in a t2. We noticed sometimes its really really loud and sometimes not. He has rewired the fuel pump and is running stock efi. We just changed the plugs and noticed that the car is running lean @ 10psi... They are white and so is the o2 sensor. So is this pump taking a ****? Its new.........

You notice any certain conditions when its loud?

Usually whinning of the pump is indicative of an upcoming failure, no?

mine is like that too, sometimes its quiet, sometimes loud. how loud? mine isnt really all that loud ever, it does vary though

At idle you can hear it over the exhaust( dp/mp) from outside the car...

higgis was so loud he could hear it over the open dp....



mine is audible at idle, sometimes

Did you use the "kit" that uses the lower rubber isolator as stock?

Did you clamp the Walbro to the metal bracket? This can cause lots of noise.





-Ted

i can hear mine but only if i listen for it with the radio off. the exhaust covers it up most the time.



we'll see how it is once the second one is in there.



kevin.

You can usualy hear mine at idol in and out of the car..............thats with 3"DP 3"test pipe and CS catback lol

I will have him check into those...