High fuel pressure problem

[onmyway87]

I recently replaced my stock fp for a walbro unit..I started the car and my fuel pressure is at 70 psi at idle . I have an adjustable fp regulator ..vac line on/ off makes no difference..nor will it go down turning the screw..I'm stumped..regulator worked fine with stock pump ..and ideas / suggestions would be helpful..thanks

 

[Mike Licht]

sounds like the return line is kinked, check just in front of the gas tank where the rubber lines are above the heat shield over the axle, it happens
Mike

 

[onmyway87]

Okay thanks for the info ..I check it out

 

[Ttype6]

I recently replaced my stock fp for a walbro unit..I started the car and my fuel pressure is at 70 psi at idle . I have an adjustable fp regulator ..vac line on/ off makes no difference..nor will it go down turning the screw..I'm stumped..regulator worked fine with stock pump ..and ideas / suggestions would be helpful..thanks

Which Walbro?

 

[onmyway87]

340 from gbodyparts

 

[Ttype6]

340 from gbodyparts

Does this pump flow 340 LPH?

 

[onmyway87]

im not sure ..but i think its less than that

 

[onmyway87]

Lines were crimped at the tank ..good call mike

 

[Ttype6]

Lines were crimped at the tank ..good call mike

Idle fuel pressure good?

 

[onmyway87]

Yes I can adjust the pressure once again by the regulator . 43 psi