possible fuel pump issue
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Fleet Mechanic
Joined: Sep 2003
Posts: 1,980
Likes: 2
From: central ohio
possible fuel pump issue
twice this week my '94 2.3 has died right after starting. i got it to fire on either both times and eventually would run on its own. i bought a guage to see what the fuel pressure was running cause when i suspected it was a fuel issue i had put a small scewdriver in the fuel rail test port valve, expecting a spray of fuel and there was nothing. well with the guage on i had no pressure at first, engine wouldnt start, finnally for no reason i had pressure and it started, was running right at 30 psi. can drive down the road and seems to have no problems getting enough fuel, accelerates through the gears just like always. i dont know if theres a relay/electrical issue or a pump about to die completely. seems a pump should either work or not work, not be a intermittant problem. and its never happend once its running, its always been a start-up issue. im sure sometime its going to be completely dead in the water. any thoughts/ideas?
Postmaster
Joined: Oct 2003
Posts: 4,516
Likes: 1
From: SoCal
If you're lucky it's just a flaky relay. If the CEL (check engine light) does not come on for 2 seconds when you turn the key one click try swapping out the PCM power relay.
If the CEL does come on but you don't hear the fuel pump prime for 2 seconds try swapping the fuel pump relay.
If the CEL does come on but you don't hear the fuel pump prime for 2 seconds try swapping the fuel pump relay.
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Fleet Mechanic
Joined: Sep 2003
Posts: 1,980
Likes: 2
From: central ohio
well i showed no pressure on the fuel rail so i changed out the regulator on the fuel rail, ran fine with no problems for about a month. then today it didnt want to start when i left work. finnally got it going, drove home (15 miles) no problems, went 70 with no issues, then about 30 min after i got home i needed to run to my parents, damn thing wouldnt start, got running using either and went down the road fine once again, didnt shut it off until i got back home again. wish i could keep the pressure guage hooked up all the time to monitor it.
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SomeDude451
1997 - 2006 Expedition & Navigator
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Nov 2, 2016 07:14 PM
