can someone help me with a fuel problem???

[95tsiawd0330]

Ok so I wanted to check to see what my fuel pressure was on my 95 talon tsi.so i have a fuel tester kit that has all types of fittings for all differnt car.I just went out to my car and hooked up a fuel tester to my fuel rail on the left side right were the fuel line goes to the filter.so after I had everything connected I started my car and let it warm up I seen that my fuel pressure was at 48 psi and when I removed my vacuum line from the stock fpr it wanT to 51 psi.now I read that 95 should have 43.6 psi.what will cause this to be this high.also i have the stock fpr that has a vacuum line that goes to the fpr to a solenoid and then the solenoid connects to a vacuum line going to intake manifold just to let you guys know

 

[nek]

Vacuum leak. The fpr should drop idle pressure the more vacuum it sees. It also should increase with boost (not sure if the stock does it but aftermarket does) . Also resistance in the return line would raise pressure.

 

[95tsiawd0330]

Vacuum leak. The fpr should drop idle pressure the more vacuum it sees. It also should increase with boost (not sure if the stock does it but aftermarket does) . Also resistance in the return line would raise pressure.

I forgot to mention that I have a 255 fuel pump with stock fpr can this cause my 48 psi fuel pressure ?

 

[zcoh2gdsm]

yes, you have a high flow fuel pump, it will eventually over run your stock fpr.

 

[synthetek]

I forgot to mention that I have a 255 fuel pump with stock fpr can this cause my 48 psi fuel pressure ?

Yes the 255 can be to much for the stock fpr, you need something like an aeromotive or fuellab fpr to adjust your fuel pressure.

 

[95tsiawd0330]

Yes the 255 can be to much for the stock fpr, you need something like an aeromotive or fuellab fpr to adjust your fuel pressure.

So can I set my base fuel pressure in ecmlink to 48 psi because if I go in to my fuel tab on link and use the calculate for my global it say that my global should be for 880cc=840/ base fuel psi 48 = 49.6 would that be ok (((840cc injector/base fuel pressure 48 psi/stoichiometic 14.7:1 =49.6)))until i get the money for a fpr

 

[synthetek]

It might not be consistent as the fuel pressure raises since the stock for can't handle the 255