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Old 02-10-2008
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DPFE help

Hi, I have a 2003 Ranger 0.3 with Std trans, I am having what appears to be as hesitation or slight stumble at low throttle/ cruise speed. My truck is the U code in the VIN and has the plastic intake. From what I have been reading it sounds like my DPFE is going bad. I was not sure If a 2003 3.0 still used this DPFE/ EGR system but he said Ford did on the 2003. My understanding is it should be on the drivers side with the EGR attached to the intake manifold and the DPFE beside it and is a rectangle black plastic box with 2 rubber tube attached and a electrical connection. I can find this on my truck. Can someone please explain to me where it is and should I have one for sure. While I have no CEL coming on it does drive me crazy the way it drives at cruise speed. Here is a pic, thanks

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Old 02-10-2008
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your truck does not have a EGR system
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Old 02-10-2008
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Thanks that's what I thought, which is why I can't find it. This is why I'm so messed up because my Ford dealer say's I have a ERG system and gave me a print out which say's " Catalog: Ranger R 1983-2003 Section: Emission system- E.G.R. 6 cyl. 3.0L - EXC. SOHC 2000- 2003" So I will have to take her in and see what code(s) come up. Thanks!

The truck has about 65000 miles on her, I just put new plugs, plug wires, new air filter, spray cleaned the mass air sensor,oil and filter, runs great except for a little stumble at 2000 to 25000 rpm cruise, Any one have any ideas?
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Old 02-11-2008
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looking closer at your pic it appears that maybe you do have an EGR system. the two rubber hoses on the back side of the intake could go to a DPFE sensor.

can you take a pic of where those two hoses go?

and the DPFE sensor will not cause a stumble as all it does is monitor exhaust gas flow.

see if you can also get the code(s) pulled
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Old 02-11-2008
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I'll post the codes tonight, thanks!
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Old 02-11-2008
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if your going to change the dpfe change the egr as well.
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Old 02-11-2008
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So just to go over a few issues, I don't have a OEM installed EGR system, for one to be there you must have a tapped outlet on one of the exhaust manifolds, I have no such thing after a very good look today from the top side and also under the truck today. In my understanding is 03 and up at least in Canada don't use the EGR/DPFE system.

So I went and had the code(s) read today, well nothing comes up. So I have no check light or codes. So I then did some more research on the advice a none dealer mechanic gave me. Here is what I found from Alldata: BUCK/ JERK AND MISS DURING DRIVE CYCLE ABOVE 3000RPM

FORD: 2000-2003 Taurus, Ranger

ISSUE: Some 2000-2003 Taurus, Sable, Ranger vehicles equiped with a 3.0L 2-valve gas or FFV engine may exhibit a buck or jerk miss during drive cycles above 3000 RPM with no diagnostic trouble codes (DTC's). A possible cause is the camshaft synchronizer assembly. Since the camshaft position (CPM) fault monitor is not active above 2500RPM, no diagnostic trouble code (PO340) is set during the drive concern, thus making it difficult to diagnose the root cause component.

For those who don't know what the synchronizer assembly looks like, it looks the the bottom half of a distributor with a gear that drives of the cam. the Ford dealer wants $443.03 to change it , with a book rate of 1.2 hours labour to do it.

So now I need to know with I do it myself is it a straight bolt in or do I need to check and or reset timing?.
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Old 02-11-2008
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Originally Posted by Mark98xlt View Post
if your going to change the dpfe change the egr as well.

why would you change the valve if theres nothing wrong with it????

the DPFE system is very simple and the pressure sensor will not cause ANY dirveability problems as it is a 'INPUT" device and just tells the computer if the EGR valve is open when the computer commands it open!
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Old 02-11-2008
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Quote:
Originally Posted by 500guy View Post
So just to go over a few issues, I don't have a OEM installed EGR system, for one to be there you must have a tapped outlet on one of the exhaust manifolds, I have no such thing after a very good look today from the top side and also under the truck today. In my understanding is 03 and up at least in Canada don't use the EGR/DPFE system.

So I went and had the code(s) read today, well nothing comes up. So I have no check light or codes. So I then did some more research on the advice a none dealer mechanic gave me. Here is what I found from Alldata: BUCK/ JERK AND MISS DURING DRIVE CYCLE ABOVE 3000RPM

FORD: 2000-2003 Taurus, Ranger

ISSUE: Some 2000-2003 Taurus, Sable, Ranger vehicles equiped with a 3.0L 2-valve gas or FFV engine may exhibit a buck or jerk miss during drive cycles above 3000 RPM with no diagnostic trouble codes (DTC's). A possible cause is the camshaft synchronizer assembly. Since the camshaft position (CPM) fault monitor is not active above 2500RPM, no diagnostic trouble code (PO340) is set during the drive concern, thus making it difficult to diagnose the root cause component.

For those who don't know what the synchronizer assembly looks like, it looks the the bottom half of a distributor with a gear that drives of the cam. the Ford dealer wants $443.03 to change it , with a book rate of 1.2 hours labour to do it.

So now I need to know with I do it myself is it a straight bolt in or do I need to check and or reset timing?.

you need to make sure the engine is top dead center when you do this ... its not to hard but id let the dealer do it if you dont know that much about engine work ...
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Old 02-11-2008
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Quote:
Originally Posted by 04 EDGE View Post
why would you change the valve if theres nothing wrong with it????

the DPFE system is very simple and the pressure sensor will not cause ANY dirveability problems as it is a 'INPUT" device and just tells the computer if the EGR valve is open when the computer commands it open!
Its hit or miss which ones bad if the egr is bad usually the dpfe is bad as well I know a couple people who experienced this problem with the egr going bad and changing it and the dpfe was bad as well. I am one of them on my 98.

also watch out for the cps syncronizer I lost my engine to that problem in spring of 07
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Old 02-16-2008
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Yes NO EGR on '03+. Cam Sync is not that hard to replace. Again make sure you are on top dead center.
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Old 02-17-2008
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Originally Posted by Mark98xlt View Post
Its hit or miss which ones bad if the egr is bad usually the dpfe is bad as well I know a couple people who experienced this problem with the egr going bad and changing it and the dpfe was bad as well. I am one of them on my 98.

this is not "hit or miss" !!!!

if you have the proper tools and understand the system diaging it is a breeze.
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Old 02-17-2008
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Quote:
Originally Posted by Mark98xlt View Post
if your going to change the dpfe change the egr as well.
i have to agree with this...i went through 3 DPFEs before changing my EGR and once i changed both ive had no problems
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