PO303, P0304 and P0305
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Joined: Dec 2020
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From: Texas, Texas
PO303, P0304 and P0305
2003 Ranger Edge 3.0 auto with 198k.
Was running fine and at stop sign it started running BAD with CEL on. I was only a couple miles from home so I was able to limp home. It was running TERRIBLE!
This AM I went to Autozone to get them to pull the codes and PO303, P0304 and P0305 came up along with a few others. Misfires in 3, 4 and 5. I suspect the other codes are caused by the misfires.
Any ideas where to start before I start throwing parts at this thing?
I am the original owner so I know it’s history.
Thanks in advance.
Was running fine and at stop sign it started running BAD with CEL on. I was only a couple miles from home so I was able to limp home. It was running TERRIBLE!
This AM I went to Autozone to get them to pull the codes and PO303, P0304 and P0305 came up along with a few others. Misfires in 3, 4 and 5. I suspect the other codes are caused by the misfires.
Any ideas where to start before I start throwing parts at this thing?
I am the original owner so I know it’s history.
Thanks in advance.
Welcome to the forum
When did you get gasoline last?
Reads like some "bad" gas
Takes 1 to 2 days before the water in the bad gas settles out and causes running issues, can happen sooner just depends on how much water was in that gas
Water and gasoline can't "mix" and water is heavier than gasoline, so when vehicle sits the water settles to the bottom of tank and thats where fuel pump sucks in "the gas"
So if it happened just after vehicle sat for a few hours......................
Its the "all of a sudden" thing that pointed at this
And maybe a fuel pump issue, it can/will happen suddenly
When did you get gasoline last?
Reads like some "bad" gas
Takes 1 to 2 days before the water in the bad gas settles out and causes running issues, can happen sooner just depends on how much water was in that gas
Water and gasoline can't "mix" and water is heavier than gasoline, so when vehicle sits the water settles to the bottom of tank and thats where fuel pump sucks in "the gas"
So if it happened just after vehicle sat for a few hours......................
Its the "all of a sudden" thing that pointed at this
And maybe a fuel pump issue, it can/will happen suddenly
Last edited by RonD; Dec 5, 2020 at 10:18 AM.
Thread Starter
|
Member
Joined: Dec 2020
Posts: 3
Likes: 0
From: Texas, Texas
Welcome to the forum
When did you get gasoline last?
Reads like some "bad" gas
Takes 1 to 2 days before the water in the bad gas settles out and causes running issues, can happen sooner just depends on how much water was in that gas
Water and gasoline can't "mix" and water is heavier than gasoline, so when vehicle sits the water settles to the bottom of tank and thats where fuel pump sucks in "the gas"
So if it happened just after vehicle sat for a few hours......................
Its the "all of a sudden" thing that pointed at this
And maybe a fuel pump issue, it can/will happen suddenly
When did you get gasoline last?
Reads like some "bad" gas
Takes 1 to 2 days before the water in the bad gas settles out and causes running issues, can happen sooner just depends on how much water was in that gas
Water and gasoline can't "mix" and water is heavier than gasoline, so when vehicle sits the water settles to the bottom of tank and thats where fuel pump sucks in "the gas"
So if it happened just after vehicle sat for a few hours......................
Its the "all of a sudden" thing that pointed at this
And maybe a fuel pump issue, it can/will happen suddenly
Cylinders 3, 4, and 5 don't have much in common, 3 and 4 do share 1 coil in the coil pack
1 and 5 share another coil in the pack
Firing order for 3.0l is 1-4-2-5-3-6
The cam sensor failing can cause misfires but there for sure would be Cam sensor failure codes along with misfire codes
The sudden onset is the main thing to focus on, a crack in coil pack could explain it but long shot
A broken larger vacuum hose as well, or hose popping off
And, of course, computer failure but that's way way down on the list
1 and 5 share another coil in the pack
Firing order for 3.0l is 1-4-2-5-3-6
The cam sensor failing can cause misfires but there for sure would be Cam sensor failure codes along with misfire codes
The sudden onset is the main thing to focus on, a crack in coil pack could explain it but long shot
A broken larger vacuum hose as well, or hose popping off
And, of course, computer failure but that's way way down on the list
Thread Starter
|
Member
Joined: Dec 2020
Posts: 3
Likes: 0
From: Texas, Texas
Cylinders 3, 4, and 5 don't have much in common, 3 and 4 do share 1 coil in the coil pack
1 and 5 share another coil in the pack
Firing order for 3.0l is 1-4-2-5-3-6
The cam sensor failing can cause misfires but there for sure would be Cam sensor failure codes along with misfire codes
The sudden onset is the main thing to focus on, a crack in coil pack could explain it but long shot
A broken larger vacuum hose as well, or hose popping off
And, of course, computer failure but that's way way down on the list
1 and 5 share another coil in the pack
Firing order for 3.0l is 1-4-2-5-3-6
The cam sensor failing can cause misfires but there for sure would be Cam sensor failure codes along with misfire codes
The sudden onset is the main thing to focus on, a crack in coil pack could explain it but long shot
A broken larger vacuum hose as well, or hose popping off
And, of course, computer failure but that's way way down on the list
The codes are:
the ones mentioned in the OP and...
PO128 coolant thermostat. (Below operating temp)
P0316 misfire on startup
P0171 system too lean
P0300 random misfire
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