1800 PSI fuel pump

[lavoiespeed3]

I installed a hi-flow catalytic converter last day and I logs a 3rd gear WOT
All are ok but I have 1800 PSI of fuel pressure at 5000 rpm. It's safe? My last logs before my upgrade is 1600 psi at 5000 rpm.

and when I release the gaz pedal after a WOT and use the compression I see the psi fuel pump stay hate 1200 and decrease gradually it's normal?

 

[ReNaToMS3]

Yes, it's normal.

Not normal is getting less than 1500-1600 PSI WOT. Your idle should be around 480 PSI.

 

[lavoiespeed3]

I will check my IDLE right now

 

[lavoiespeed3]

420/440 at 850 RPM

 

[lavoiespeed3]

475 psi at 750 rpm

 

[lavoiespeed3]

I stay to 430 PSI at Real Idle

 

[bykeryder4life]

OP, more pressure likely means more volume, so be happy to see higher pressure. This car can have 2000+ at WOT and be very happy, thats the nature of DI. Worry about low pressures. Idle should be around 400-450 but it fluctuates alot so it will never be exact.

 

[AutoEuphoria]

It's fine.

 

[H3br3w_Ham3r]

When I go WOT I see my pressures drop down to three didgets but then quickly return to the normal range. Is this normal since the fuel pump needs a brief moment to catch up or am I seeing fuel cut?

It is also very cold here so I am not sure if the temps are also to blame.

 

[Jchouin1]

When I go WOT I see my pressures drop down to three didgets but then quickly return to the normal range. Is this normal since the fuel pump needs a brief moment to catch up or am I seeing fuel cut?

It is also very cold here so I am not sure if the temps are also to blame.

Do you see it at the same engine speed every time it happens?

 

[H3br3w_Ham3r]

Do you see it at the same engine speed every time it happens?

Didn't think about testing that. I will next time I'm out.

 

[Bravnik]

When you mash the gas your FP should never go down then up. That's a FP that is not responding quick enough. If you have an 07 you might fall under the TSB where the FP Solenoid does not respond quick enough and you can get a new pump. If not, then you need to start thinking about internals or a new aftermarket FP.