V12Godspeed

I know I know, use the search button. I am in a hurry and can't seem to find it.

Someone please tell me what is the stock fuel pressure on a 55k car. much appreciated.

I only say it because my car seems to be misfiring, we are trying to rule out every possibility. We are checking fuel pressure to see if its too much or too little.

MBTEK

AROUND 72 PSI

loungn14

shardul

iTrader: (1)

80 psi and then drops to 65 psi after 45k rpms

V12Godspeed

Is this at iddle? or is it constant? I have heard it is 65 PSI all the time.

Thanks for the info.

V12Godspeed

Hmm, this is at iddle? If thats the case then i might have a problem, I only need 65 psi to begin with...

shardul

iTrader: (1)

at idle it is around 80 psi. in the past i have tapped a fuel gauge on the windshield and have done a couple of runs. it drops to 65psi at 45k ish rpms.
now my car is tuned so dont know what the stock fuel pressure numbers are.

03'55AMG

So im assuming that the pump cant sufficiently keep up with the engine past 4,500 RPMs?

shardul

iTrader: (1)

pressure and volume have a inverse relationship