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06-28-2015, 10:15 PM
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Ford Ranger Driver
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Join Date: Aug 2010
Posts: 114
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P0400 EGR Flow
I have a 2008 Ranger XL 2wd with the 2.3 liter Duratech & 5 speed automatic. It has 94,500 miles on it. I replaced the plugs, wires & coil 2000 miles ago. Twice the CEL has come on with the same code, P0400. The first time was a day after the service, the second time was yesterday, 2000 mile later. I used Motorcraft plugs, wires & coil when they were changed. Any ideas?? Is the EGR Value going bad?? I know it's hard to get to, BUT can a person see it to check the vacuum lines, and wiring connections easily? When the CEL comes on, the idle is perfect, it still has plently of power, no misses, 25-26 MPG on the highway.
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]2008 XL 4x2 Reg. cab 2.3l Auto, K&N drop in filter, Pioneer DEH-15UB head unit, Optima Red Top battery. LED'S in taillights, backup lights, sidemarkers, dome light, license lamps, and parking lamps. Factory Fog lamps installed. Throttle cable mod.
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06-29-2015, 10:25 AM
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Wrist Twister
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Join Date: Jun 2012
Posts: 995
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Re: P0400 EGR Flow
Quote:
Originally Posted by Wally B
I have a 2008 Ranger XL 2wd with the 2.3 liter Duratech & 5 speed automatic. It has 94,500 miles on it. I replaced the plugs, wires & coil 2000 miles ago. Twice the CEL has come on with the same code, P0400. The first time was a day after the service, the second time was yesterday, 2000 mile later. I used Motorcraft plugs, wires & coil when they were changed. Any ideas?? Is the EGR Value going bad?? I know it's hard to get to, BUT can a person see it to check the vacuum lines, and wiring connections easily? When the CEL comes on, the idle is perfect, it still has plently of power, no misses, 25-26 MPG on the highway.
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The EGR valve on the duratecs is a pretty robust design from what ive read. I find it very strange that you are having issues on one with 94,500 miles when members with twice that mileage have no issues. I would want to hook that truck up to a scanner and monitor fuel trims, do a fuel pressure test, and maybe even check compression. If the EGR valve is actually clogged up, something has to be causing the carbon buildup, and that to me screams "running rich." Your gas mileage seems about right for an auto so that suggests it isnt running rich This does suggest maybe its a cracked vacuum hose, a wire thats broken inside, or a bad connector.
I am going to be working on my 02 duratec tonight (well, tearing it apart to change the front springs), and ill see what I can see with the EGR valve. I know to remove it you have to angle the engine/transmission down Given your issue and the pain involved, I think im going to clean out the port, replace the egr valve, and replace the 3-way coolant hose when I take the trans out to change the clutch slave (mines a manual). Anyways, ill repost tonight when I find out something.
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06-29-2015, 07:50 PM
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The Projectionator
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Join Date: May 2014
Posts: 861
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Re: P0400 EGR Flow
The connector for the EGR motor is at the very back of the engine on the driver's side. The intake manifold will stop you from easily getting to it, but you might be able to wiggle your way back there. First step is to make sure it's plugged in. If it is, try to unplug it, and plug it back in again to make sure it's got good contact. It's certainly not unreasonable that the EGR motor can fail, but it's generally not an issue on this engine. Do everything you can think of to check for electrical or wiring issues before trying to replace it.
Another thing to note is that this valve does have a coolant passage going through it. Check your coolant level to see if it's low. If it is, look for the hose that runs to it. You can find it teeing off of the hose to the thermostat on the driver's side of the engine. Give it a light tug to make sure it isn't loose. If it is, you're not going to have any fun putting it back on.
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2003 Ford Ranger XLT
2.3L I4 Duratec DOHC, 5R44E 5-speed auto, RWD, 7.5" Open w/ 4.10 Ratio, Gibson split-rear catback
Sonic Blue Pearl with dark gray trim
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06-30-2015, 07:19 PM
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Ford Ranger Driver
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Join Date: Aug 2010
Posts: 114
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Re: P0400 EGR Flow
Thanks for the replys! I felt the EGR from above, no loose wires, vacuum hoses are tight, no loss of coolant. I cleared the code, if it comes on again, I'll have to take it to my mechanic, as I have no way to lower the tranny to change it, or take it off to clean it.
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]2008 XL 4x2 Reg. cab 2.3l Auto, K&N drop in filter, Pioneer DEH-15UB head unit, Optima Red Top battery. LED'S in taillights, backup lights, sidemarkers, dome light, license lamps, and parking lamps. Factory Fog lamps installed. Throttle cable mod.
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06-30-2015, 07:42 PM
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The Projectionator
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Join Date: May 2014
Posts: 861
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Re: P0400 EGR Flow
I was able to remove and clean mine after taking the intake manifold off. If you can manage to remove that, and then get the firewall insulation out of the way, then you stand a chance. Just don't expect to get a torque wrench in there for the proper tightness on those bolts. Gearwrenches are amazing too.
NOTE: if you ever remove it, replace the gasket. It's a very thin metal gasket, and that's all there is keeping those exhaust gasses and coolant within the valve and separate from each other. It does those jobs very well, but only once. If it's ever removed, it's dead, Jim. New gaskets aren't expensive. Just make sure you have one in advance.
__________________
2003 Ford Ranger XLT
2.3L I4 Duratec DOHC, 5R44E 5-speed auto, RWD, 7.5" Open w/ 4.10 Ratio, Gibson split-rear catback
Sonic Blue Pearl with dark gray trim
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06-30-2015, 08:09 PM
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Wrist Twister
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Join Date: Jun 2012
Posts: 995
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Re: P0400 EGR Flow
Quote:
Originally Posted by riscorpian
I was able to remove and clean mine after taking the intake manifold off. If you can manage to remove that, and then get the firewall insulation out of the way, then you stand a chance. Just don't expect to get a torque wrench in there for the proper tightness on those bolts. Gearwrenches are amazing too.
NOTE: if you ever remove it, replace the gasket. It's a very thin metal gasket, and that's all there is keeping those exhaust gasses and coolant within the valve and separate from each other. It does those jobs very well, but only once. If it's ever removed, it's dead, Jim. New gaskets aren't expensive. Just make sure you have one in advance.
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Holy crap. OP, I think you and I both might have egr issues. I need to get a manual now that has a worth of crap illustration of the egr system on this truck. I have been losing a very small amount of coolant, and I hear this almost running water sound while its running (the catalyst just doing its job though perhaps?). Maybe all thats normal and my slow leak is a pinhole in the radiator or something, but I should definitely check it when I remove the trans to change the clutch slave.
Difference is, ive never had any codes and I dont know show any signs of coolant consumption so it would depend on how its leaking.
Anyways, let us know what you find.
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08-17-2021, 06:45 AM
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Learning to use the forums
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Join Date: Aug 2021
Posts: 1
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Re: P0400 EGR Flow
I have a 2008 Ford Ranger Xl with the 2.3L and Manual trans and My check engine light Just came on checked the codes and got the P0400 EGR Flow code. Just wondering where the egr is located on a 2008 Ford Ranger with the 2.3L in it.
Thanks
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