p0304 | Ford Explorer Forums - Serious Explorations

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p0304

  1. A

    2017 3.7 PIU misfire codes 4.5.6 after new water pump

    Had shop replace water pump, timing chain, vvts, and all the rest. 5k. Took them 3x in a period of 2.5 wks to get it to run right. But alas, it's not. Before I could FOT at any point, regardless of speed etc and it would just get up n go. Now it blows codes misfire 4.5.6. There 5...
  2. S

    Help with a random misfires problem P0300, P0303, P0304, P0316

    Smart ford owners, tinkers and mechanics; Looking for assistance, help and advice! We have a 2004 Ford Explorer 4.0L SOHC v6 with about 71k miles on it and misfire problem that I haven't been able to get to the bottom of yet. I have a scanner with live data capabilities if there are other...
  3. D

    Can fuel injector service cause cyl 4 misfire

    Hello, I recently had the fuel injector service done on my 98 Explorer while at Wal Mart. Initially, it ran fine, but within a couple of days I started noticing a hesitation when I would accelerate as well as a very rough idle. So I had the CEL code read and was told that Cylinder 4 was...
  4. J

    misfire on cylinder 4 & 6

    background: explorer ran fine for a year or so after I bought it, however would notice sometimes at WOT the CEL would flash briefly till I let off the gas, and it would accelerate and run fine fast forward to a week ago, I finally got a CEL that was constant...ran the code and got...
  5. U

    Help p0304, p0305

    Hello to everyone here, and thanks in advance for any possible help. I have a 99 ford ranger 3.0 flex fuel truck. symptom the truck has a small misfire. The trucks cel came on a few weeks ago threw a p0304 code, i replaced the spark plugs nothing, I changed the wires nothing, I changed the...
  6. M

    Rough idle with P0300, P0304, P0305, P0306

    If anyone can help with this it would be greatly appreciated. I have a 1998 Explorer with the 4.0 SOHC and about 98K miles. Everything was fine when I left it for about two weeks in the driveway. When I came back the MIL was on, running rough and a moderate to loud ticking noise. It was a great...
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