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
  • CAR REPAIR CONTRIBUTOR
  • 700 POSTS
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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