1996 Jeep Cherokee Fuel injection

1996 JEEP CHEROKEE
48,000 MILES • 6 CYL • 4WD • AUTOMATIC
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NISTECH
  • MEMBER
  • 1 POST
need to find the fuel presure regulator. and what is the running fuel presure? Mileage dropped, we were grtting 25+ now 13. Presure now 55PSI. Does not drop after engine stopped.
Jun 13, 2010 at 10:59 AM
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INTERNETMECHANIC
  • ✓ASE Certified Mechanic
  • 700 POSTS
  • ASE Certified Mechanic
The pressure regulator shows to be part of fuel pump module assembly. Not serviceable separately, so says MOD. The regulator is mechanical, not controlled by vacuum or pcm. I saw one spec that said 47--51 psi. I also saw a service bulletin for diagnosing fuel pump, the bulletin listed the fuel pressure at 49 psi, plus or minus 5 psi. I'd want to look at the fuel trims, if it is adding, I'd want to know why? I'd hate to replace fuel pump module for 1 psi,but, that fuel mileage drop is a big issue.
Jun 13, 2010 at 11:51 AM
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