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Unread 04-20-2010, 08:27 PM   #1
95YJI6
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Fuel pressure regulator

do inline 6 yjs have a fuel pressure regulator? if so where would it be?

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Unread 04-20-2010, 09:32 PM   #2
95YJI6
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also if there is one, can it be adjusted?
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Unread 04-20-2010, 09:45 PM   #3
hondacr21
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someone can correct me if I am wrong but where your fuel line connects to the fuel rail, the regulator is the little round thing with the vac line goin to it, then shortly after that there is the return line goin back to the tank. I dont believe it is adjustable
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Unread 04-21-2010, 05:07 AM   #4
Alfons
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Quote:
Originally Posted by hondacr21 View Post
someone can correct me if I am wrong but where your fuel line connects to the fuel rail, the regulator is the little round thing with the vac line goin to it, then shortly after that there is the return line goin back to the tank. I dont believe it is adjustable
The regulator is on the fuel rail as you say, but it's part of the fuel return line instead of the feed & the stock regulator is not adjustable. If the fuel pressure drops, it's generally a big drop and is a result of pump problems - I rarely see regulator problems. If you're running rich, the vacuum line to the regulator could be disconnected -this would give you approximately 8lb. pressure increase.

What I would recommend getting a fuel pressure gauge and check all the pressures (normal, max, without vacuum, leak-down time).
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Unread 04-21-2010, 06:14 AM   #5
95YJI6
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what i am thinking is im running too lean and the car keeps stalling out
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Unread 04-21-2010, 03:25 PM   #6
Alfons
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By checking the fuel pressures you can determine if you're on the right track or whether you have some sensor problem - if your fuel pressure is poor, you may need to look for a new pump. Have you tried to look for any stored diagnostic codes? There may not be any, but that still wouldn't mean that there wasn't a sensor problem, OBD1 had a lot of holes in it, but if you do have some codes, it would be a bonus in determining what your problem might be.
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Unread 04-21-2010, 05:14 PM   #7
95YJI6
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check engine light never came on, where is the obd1 port, i looked every where under the dash and found nothing!!! i know what it looks like is it on the passenger side maybe?
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Unread 04-23-2010, 05:58 AM   #8
Alfons
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The OBD1 port is under the hood on the firewall, driver's side, close to where the clutch master is attached.

The CEL doesn't come on for every code. You can get the codes by using the key on-off-on-off-on method and counting the flashes of the CEL. There's a short break between the 2 digit numbers and a longer break between the numbers & keep in mind that the codes will ALL be 2 digit numbers.

You might consider getting a manual that describes the fuel system tests or do a search on this site for a description of these tests - I've posted some a few times. If you don't find anything, maybe I can find what I had previously posted.
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Unread 04-23-2010, 06:43 AM   #9
95YJI6
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ok, thanks i never thought of looking under the hood for it, i have an obd2 scanner now i just need to find someone who has an obd1
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Unread 04-23-2010, 07:51 AM   #10
Que89YJ
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Look in the FAQ. You can check the faults without a scanner, but like he said, many of the sensors fail without throwing a fault code. Check your fault codes, check your fuel pressure. Post exactly what the symptoms are are what you find and I am sure someone can help here.
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Unread 04-23-2010, 08:28 AM   #11
MJMPC
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Here ya go read this.


OBDI Error/Check Engine Codes - JeepForum.com Community Jeep Wiki
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