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  #16  
Old 06-21-2012, 10:08 PM
99Rangerxlt 99Rangerxlt is offline
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Quote:
Originally Posted by jfeazell
FWIW... I have heard that the purpose of the EGR is to lower the temperature of the combustion chamber in order to reduce emissions... and that when it's not working, the higher temperature of the exhaust gas "can" hurt your catalytic converter... Of course, that was told to me by someone at a shop with a vested interest in me having them work on my truck, so who knows.
this is true but I've read on here a while ago that they have a minimal effect on our trucks, but that could be true or not

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  #17  
Old 06-22-2012, 03:13 PM
Blakplague Blakplague is offline
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Default Re: EGR Flow Insufficient (PO401)

If you have a 3.0: Buy a new EGR valve (approx. $45) (and you really should replace PCV Valve while you are at it for like $3.00) Remove the EGR Valve and throttle body, use carb cleaner in the line to the UIM (From throttle body side and EGR Valve side), you will need almost a full can of it, it is usually REALLY dirty with carbon. You should be able to fit your finger into the manifold (where the throttle body mounts and to the right) and pull out larger chunks of carbon yourself. Scrub it clean. Put the new valve on and it should not give you much more problem. That old EGR is probably stuck open from all the carbon built up and replacing it and the PCV made a MASSIVE difference in my truck.
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Red 2001 Ford Ranger 3.0L XLT, Mods: Throttle Cable Mod, Composite Manifold Conversion, 67mm Throttle Body, Exhaust Dumped behind Cats, EGR Delete, MAF Mount, Electric Fan Swap, Super Chips Tuner, Transmission Cooler, Overhead console, V-Line V713 Sledge 16" Rims w/ PIRELLI Scorpion ATR's, Chrome Surestep Bumper, DUAL 550BT Receiver w/ Bluetooth, 12" Pioneer & 10" Sony Xplod Stacked Truck Boxes with 1200watt BOSS Amp, Optima Yellow Top, Painted Radio Bezel, OHC, and Door Handles.
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  #18  
Old 06-22-2012, 03:24 PM
gcextreme gcextreme is offline
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Default Re: EGR Flow Insufficient (PO401)

where did u get an egr for that price? My ford stealership wants $135. And $108 for the dpfe sensor.
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  #19  
Old 06-23-2012, 05:03 AM
Blakplague Blakplague is offline
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Default Re: EGR Flow Insufficient (PO401)

$43 at Advance Auto parts. NEVER buy parts from a dealer unless you want to pay 3x as much for it.
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Red 2001 Ford Ranger 3.0L XLT, Mods: Throttle Cable Mod, Composite Manifold Conversion, 67mm Throttle Body, Exhaust Dumped behind Cats, EGR Delete, MAF Mount, Electric Fan Swap, Super Chips Tuner, Transmission Cooler, Overhead console, V-Line V713 Sledge 16" Rims w/ PIRELLI Scorpion ATR's, Chrome Surestep Bumper, DUAL 550BT Receiver w/ Bluetooth, 12" Pioneer & 10" Sony Xplod Stacked Truck Boxes with 1200watt BOSS Amp, Optima Yellow Top, Painted Radio Bezel, OHC, and Door Handles.
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  #20  
Old 06-23-2012, 08:27 AM
gcextreme gcextreme is offline
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Default Re: EGR Flow Insufficient (PO401)

Thanks, I don't think I have an Advanced Auto around, I know there's an Auto Value store.
I will have to look around.

U wouldn't happen to know the EGR part number u got? Or brand?

Thanks
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  #21  
Old 06-23-2012, 08:29 AM
99Rangerxlt 99Rangerxlt is offline
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Quote:
Originally Posted by gcextreme
Thanks, I don't think I have an Advanced Auto around, I know there's an Auto Value store.
I will have to look around.

U wouldn't happen to know the EGR part number u got? Or brand?

Thanks
They all vary by parts store usually. If its called apples and bananas at auto zone, then they'll switch it to bananas and apples for advance, napa, etc.. Lol

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99 xlt supercab xlt 4.0l ohv 4x4
mirror tint all around
2 piaa 580 lights and 2 220w dick cepek lights
100w pa system
2"front/1.5 rear lift
1 10" pioneer champion sub/ 1800w jl amp/ kenwood HU
31x10.5x15 Pegasus A/T
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  #22  
Old 06-23-2012, 04:33 PM
Blakplague Blakplague is offline
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Default Re: EGR Flow Insufficient (PO401)

http://shop.advanceautoparts.com/web...___#fragment-4


Ignore the bad review, the guy got the wrong one and rated it one star.
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Red 2001 Ford Ranger 3.0L XLT, Mods: Throttle Cable Mod, Composite Manifold Conversion, 67mm Throttle Body, Exhaust Dumped behind Cats, EGR Delete, MAF Mount, Electric Fan Swap, Super Chips Tuner, Transmission Cooler, Overhead console, V-Line V713 Sledge 16" Rims w/ PIRELLI Scorpion ATR's, Chrome Surestep Bumper, DUAL 550BT Receiver w/ Bluetooth, 12" Pioneer & 10" Sony Xplod Stacked Truck Boxes with 1200watt BOSS Amp, Optima Yellow Top, Painted Radio Bezel, OHC, and Door Handles.
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  #23  
Old 06-23-2012, 04:36 PM
gcextreme gcextreme is offline
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Default Re: EGR Flow Insufficient (PO401)

Cool, thanks for the link...... do they have the PCV thing too???
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  #24  
Old 06-23-2012, 04:44 PM
Blakplague Blakplague is offline
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Default Re: EGR Flow Insufficient (PO401)

Quote:
Originally Posted by 99Rangerxlt View Post
I wouldnt consider it a priority unless you strive to lower your emissions haha

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Actually it helped me a LOT. I was experiencing sputtering as I took my foot off the accelerator and that fixed it.
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Red 2001 Ford Ranger 3.0L XLT, Mods: Throttle Cable Mod, Composite Manifold Conversion, 67mm Throttle Body, Exhaust Dumped behind Cats, EGR Delete, MAF Mount, Electric Fan Swap, Super Chips Tuner, Transmission Cooler, Overhead console, V-Line V713 Sledge 16" Rims w/ PIRELLI Scorpion ATR's, Chrome Surestep Bumper, DUAL 550BT Receiver w/ Bluetooth, 12" Pioneer & 10" Sony Xplod Stacked Truck Boxes with 1200watt BOSS Amp, Optima Yellow Top, Painted Radio Bezel, OHC, and Door Handles.
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  #25  
Old 06-23-2012, 04:46 PM
99Rangerxlt 99Rangerxlt is offline
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Hmm interesting

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mirror tint all around
2 piaa 580 lights and 2 220w dick cepek lights
100w pa system
2"front/1.5 rear lift
1 10" pioneer champion sub/ 1800w jl amp/ kenwood HU
31x10.5x15 Pegasus A/T
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  #26  
Old 06-24-2012, 01:24 AM
Blakplague Blakplague is offline
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Default Re: EGR Flow Insufficient (PO401)

http://shop.advanceautoparts.com/web...RPFILTAMS_____
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Red 2001 Ford Ranger 3.0L XLT, Mods: Throttle Cable Mod, Composite Manifold Conversion, 67mm Throttle Body, Exhaust Dumped behind Cats, EGR Delete, MAF Mount, Electric Fan Swap, Super Chips Tuner, Transmission Cooler, Overhead console, V-Line V713 Sledge 16" Rims w/ PIRELLI Scorpion ATR's, Chrome Surestep Bumper, DUAL 550BT Receiver w/ Bluetooth, 12" Pioneer & 10" Sony Xplod Stacked Truck Boxes with 1200watt BOSS Amp, Optima Yellow Top, Painted Radio Bezel, OHC, and Door Handles.
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  #27  
Old 10-09-2012, 05:14 PM
DannMarr DannMarr is offline
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Default Re: EGR Flow Insufficient (PO401)

You can not check vacuum flow to the EGR valve while at idle. You will need to drive it. You will need to monitor the vacuum with a gauge while driving. Hook up a hose from the green vacuum line (removed from the EGR valve) extend it under the hood to the driver window. Connect a vacuum gauge. Drive and notice the gauge, you will see that the solenoid will open and provide vacuum. If you let go of the throttle, the vacuum will drop.
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  #28  
Old 10-16-2012, 01:25 PM
usnavyvet usnavyvet is offline
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Default Re: EGR Flow Insufficient (PO401)

Ok, I have resolved my p0401 code.

As mentioned there are three components involved in the function. They are: the egr valve itself; the egr solonoid; and the flow sensor (dpfe) The egr valve is located on the top rear of the 2.5 engine, the
other components are on the passenger side.

I used two tools to troubleshoot this issue. a multimeter and a hand vacuum pump with a vac gauge on it.

First, unhook the vac line from the top of the egr valve and hook up the vac pump. If the engine is cold, it doesnt matter if you plug the vac. line. apply vacuum and it should hold steady. If it doesn't then the diaphram of the egr valve is the problem.

Next, release the vacuum and start the engine, same setup. now reapply vacuum the engine should stutter or stall. This indicates that there is exhaust flow through the valve. That is a good thing. If the idle remains constant then the egr is plugged. Getting the 1 1/16 inch nut loose on the back of the valve is difficult, I can only recommend a crowfoot wrench and pb blaster.

If the above is good. you can use a paper clip to fabricate a tool to insert in the top pin of the dpfe connector that you can use to monitor the voltage change as you pump up vacuum in the above setup. You may have to increase rpms to keep the engine running as vacuum is applied. You already know that the static output of the dfpe is ok, since you would have a P1401 code if it wasnot. What you are looking for on the voltmeter is a change from around a volt to around 4 1/2 volts as you pump the vacuum and increase the recirculation flow.

If you do not get an increase of voltage (to over 4 volts) from the dpfe as you increase the vacuum. then the dpfe is bad.

So assuming that the dpfe and the egr checks ok...... next, turn off the engine and find the vacuum line that goes from the egr valve back to the egr solonoid. It snakes along the pass side of the engine.
connect the line back up to the egr, and put the pump on the solonoid
end of the vacuum line. what you are going to check is whether the line itself is good. pump it up and it should hold vacuum. if it doesn't you've got a leak in the line itself.

finally, if all that is good. you can check the egr solonoid by connecting the pump to the connector that you removed the solonoid end of the vacuum line from. you will not be pumping this time, just using the gauge capability. start the engine and let it get warm. at some point the computer will decide it is warm enough, it will energice the solonoid and you should have vacuum registering on the gauge.

So what if it never energizes. then measure the voltage at the electrical connectors on the solonoid and you should have voltage,
if you do, the solonoid is bad, if you dont, either the ground lead at the solonoid input is floating, or the ecu is not sending the emmisons signal.

That's all I have to contribute, but I'll share one more tidbit...... I had a brand new and bad egr solonoid from Rockauto. So throwing parts at
this problem can be confusing if you dont retest and assume a new part is ok.
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  #29  
Old 10-17-2012, 08:39 AM
DannMarr DannMarr is offline
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Default Re: EGR Flow Insufficient (PO401)

----------

Quote:
Originally Posted by usnavyvet View Post
What you are looking for on the voltmeter is a change from around a volt to around 4 1/2 volts as you pump the vacuum and increase the recirculation flow.
Also make sure you have 5V supplied at the plug before testing the DPFE itself.

----------

Quote:
Originally Posted by usnavyvet View Post
then the dpfe is bad.
It is also important to test the ground return circuit of the DPFE sensor before concluding that it is bad. This of course should be done by those who have an understanding of a schematics diagram.

----------

Quote:
Originally Posted by usnavyvet View Post
So what if it never energizes. .
To double check it, it is a good idea to test it while driving as I mentioned prevously. When you are in drive and add throttle the solenoid opens.

----------

Quote:
Originally Posted by usnavyvet View Post
you can use a paper clip to fabricate a tool to insert in the top pin of the dpfe connector .
Remember that there are 3 types of DPFE sensors, so the pins may not be in the same order.
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