FUEL PRESSURE PROBLEM

  • Tiny
  • Crowman
  • 1994 JEEP YJ
  • 4 CYL
  • 4WD
  • MANUAL

94 jeep wrangler 2.5 mpi. Keep loseing pressure. Tested pump. Putting out 39 psiif I clamp return line to tank got pressure run great pressure at around 90 psi as soon as I unclamp line bottoms out to 0 psi lustput pump in any thought signed FRUSTRATED

Do you
have the same problem?
Yes
No
Sunday, January 30th, 2011 AT 12:01 AM

3 Replies

  • Tiny
  • Wrenchtech
  • EXPERT
  • 20,567 POSTS

That's indication of a bad regulator.

Was this
answer
helpful?
Yes
No
Sunday, January 30th, 2011 AT 12:15 AM
  • Tiny
  • Crowman
  • MEMBER

Wich regulator just put 1 on the fuel rail still doing same thing

Was this
answer
helpful?
Yes
No
Sunday, January 30th, 2011 AT 12:20 AM
  • Tiny
  • Wrenchtech
  • EXPERT
  • 20,567 POSTS

That's the one that's supposed to be holding it back. If you have 90 when it dead headed and good volume and 0 using the regulator, you have a bad regulator. Make sure you don't have the lines reversed although I don't think that can be done.

Was this
answer
helpful?
Yes
No
Sunday, January 30th, 2011 AT 12:23 AM

Please login or register to post a reply.

Other Fuel System Pump Pressure Questions