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chickenhouse
Enthusiast
Sep 15, 2009, 3:50 PM
Post #1 of 7
(2461 views)
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I'm loking for fuel pump pressure on a 91 Jeep Cherokee w/6cyl (240?) This thing started running like doggie doo all of a sudden. Sent the owner after plugs, wires, fuel filter. No different, runs crappy. Idle varies like it's an I A C, cleaned throttle body with throttle body cleaner. No change. Takes a long time cranking befor it starts. I put a gauge on the fuel rail an it looks like it's an overwhelming 14 to 16 lbs pressure. Stays about there when it runs. I'm thinkin a fuel pump tomorrow. Agree?
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 15, 2009, 4:13 PM
Post #2 of 7
(2457 views)
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Sounds like you have a fuel pressure problem.
Here's the spec
Fuel Pressure
Key On, engine running ------------------------------------------------------------------ 214 kPa (31 psi)
Regualtor vacuum hose disconnected ------------------------------------------------ 269-283 kPa (39-41 psi)
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
(This post was edited by Hammer Time on Sep 15, 2009, 4:14 PM)
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chickenhouse
Enthusiast
Sep 15, 2009, 4:41 PM
Post #3 of 7
(2451 views)
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Thank you sir. Pretty much what we thought. Will install new tomorrow & you have a good evening.
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 15, 2009, 4:43 PM
Post #4 of 7
(2448 views)
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OK, change the filter too.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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chickenhouse
Enthusiast
Sep 15, 2009, 4:53 PM
Post #5 of 7
(2442 views)
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Was done today. Thanks.
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chickenhouse
Enthusiast
Sep 16, 2009, 8:30 PM
Post #6 of 7
(2430 views)
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He now has 35 psi and it "runs better than when I bought it!" Thank You.
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 17, 2009, 2:25 AM
Post #7 of 7
(2424 views)
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I love it when a plan comes together.
Thanks for posting the results.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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