What to Tune First

[Dirktdolman]

I have a Vin: U and I just ran the key on engine off pressure test and it came back with 48 PSI.

I put a new Delphi Fuel Pump (FG0053), Napa Fuel Pressure Regulator (2-19782) and fuel pump relay on 24 Nov 2014. I would have put a new filter in at the same time but the one in there was only about 6 months old.

I did some research on Napa's website about the Delphi pump. Napa site says fuel Pump Pressure rating: 425 kPa. I converted this to 61.64103865 psi.

So something is wrong. Weak pump, weak FPR or plugged filter. I will replace the filter tomorrow and re-run the test.

[statesman]

What part number is on the injectors?

[Dirktdolman]

25317628

[statesman]

It'll be a Rochester.... 22.1lb @ 3bar.

[Dirktdolman]

According to Witchhunter.com it is a Delphi
http://www.witchhunter.com/injectordata1.php
http://www.witchhunter.com/flowdatapix/dl25317628.jpg

[joecar]

I have a Vin: U and I just ran the key on engine off pressure test and it came back with 48 PSI.

...

You have to cycle the key several times.

[Dirktdolman]

I cycled the key probably 5 or 6 time

[joecar]

Is your FPR manifold referenced...?

[Dirktdolman]

Yes

[joecar]

FPR may have a problem... when you remove the reference hose, do you see/smell fuel in the end of the hose...?