DPFE and EGR: where?!
Thread Starter
|
Junior User
Joined: Apr 2003
Posts: 55
Likes: 0
DPFE and EGR: where?!
I have a 94 ranger 3.0L with a bad pinging problem. I've read all the posts here on this topic and cleaned all the right things, replaced fuel filter and air filter. I swear this truck does not have a EGR valve. I have looked up and down on this motor for it. I can't find any tap off of the exhaust to follow, and I can't find any valve (other than the IAC) on the intake. There is a block off plate on the intake by the IAC. Looks factory to me, but is this where the EGR should be. I can't find the DPFE either or the octane shorting bar.
Oh, and when I unplug the connector on the distributor (I believe it's the SPOUT connector) the car dies instantly.
I'm about to chuck thi truck and get a F150, or dare I say....a GM
All info would be appricated
Oh, and when I unplug the connector on the distributor (I believe it's the SPOUT connector) the car dies instantly.
I'm about to chuck thi truck and get a F150, or dare I say....a GM
All info would be appricated
Post Fiend
Joined: Jan 2003
Posts: 9,748
Likes: 16
From: Connecticut
DPFE and EGR: where?!
If you cannot locate the DPFE and EGR valve after reading through the links in this forum and reviewing the pictures that were posted, then I have a feeling that you may have a different type of EGR system on your motor.
You may have the EVP System which is a little different setup than the DPFE System.
I was able to get this out of a '94 Ford Manual:
There are two basic types of EGR systems:
- The PFE/DPFE System
- The EVP System
All EGR valves are vacuum actuated. The vacuum diagram is shown on the emission decal for each calibration......
The EVP EGR Valve is required in EEC systems where EGR flow is controlled by the Powertrain Control Module (PCM) through an EGR Valve Position (EVP) sensor attached to the valve.
The valve is operated by a vacuum signal from the EGR Vacuum Regulator (EVR) Solenoid which actuates the valve diaphragm.
As supply vacuum overcomes the spring load, the diaphragm is actuated. This lifts the pintle off its seat allowing exhaust gas to recirculate (flow). The amount of flow is proportional to the pintle position. The EVP sensor mounted on the valve sends an electrical signal of its position to the PCM.
You may have the EVP System which is a little different setup than the DPFE System.
I was able to get this out of a '94 Ford Manual:
There are two basic types of EGR systems:
- The PFE/DPFE System
- The EVP System
All EGR valves are vacuum actuated. The vacuum diagram is shown on the emission decal for each calibration......
The EVP EGR Valve is required in EEC systems where EGR flow is controlled by the Powertrain Control Module (PCM) through an EGR Valve Position (EVP) sensor attached to the valve.
The valve is operated by a vacuum signal from the EGR Vacuum Regulator (EVR) Solenoid which actuates the valve diaphragm.
As supply vacuum overcomes the spring load, the diaphragm is actuated. This lifts the pintle off its seat allowing exhaust gas to recirculate (flow). The amount of flow is proportional to the pintle position. The EVP sensor mounted on the valve sends an electrical signal of its position to the PCM.
Thread Starter
|
Junior User
Joined: Apr 2003
Posts: 55
Likes: 0
DPFE and EGR: where?!
well, that sucks. Any idea where the EGR and the EVP is located?
I think I've traced every vacuum line off the intake possible and can't find anything looking close to these. And there is no pipe, slash hose from the exhaust manifolds back to the engine compartment for the EGR circuit.
I think I've traced every vacuum line off the intake possible and can't find anything looking close to these. And there is no pipe, slash hose from the exhaust manifolds back to the engine compartment for the EGR circuit.
Post Fiend
Joined: Jan 2003
Posts: 9,748
Likes: 16
From: Connecticut
DPFE and EGR: where?!
Maybe someone else out there with your generation motor can help you with the actual location of the EVP EGR components, since I am not really familiar with that kind of setup.
Also, did you buy the truck used? Maybe the previous owner yanked the EGR system off of the motor. I've heard of that happening before...
Also, did you buy the truck used? Maybe the previous owner yanked the EGR system off of the motor. I've heard of that happening before...
Post Fiend
Joined: Jan 2003
Posts: 9,748
Likes: 16
From: Connecticut
DPFE and EGR: where?!
Hello 03Ranger, welcome to FTE!
I've also been reading posts in some other forums from guys who have said the same thing ...they cannot find an EGR system on their '94 3.0L.
If you do get any feedback on the issue from anyone at your dealership, please post it.
P.S. It's a good thing the '94 vulcan engines have knock sensors, otherwise I bet they'd ping like crazy since they have no EGR system to keep the combustion chamber temperatures down.
I've also been reading posts in some other forums from guys who have said the same thing ...they cannot find an EGR system on their '94 3.0L.
If you do get any feedback on the issue from anyone at your dealership, please post it.
P.S. It's a good thing the '94 vulcan engines have knock sensors, otherwise I bet they'd ping like crazy since they have no EGR system to keep the combustion chamber temperatures down.
Trending Topics
Senior User
Joined: Sep 2000
Posts: 385
Likes: 0
From: Flat Rock, Michigan
DPFE and EGR: where?!
Fedds3.0:
Hey man, i just posted this same question in another part of this forum. I have a 91 Ranger with a 3.0L and i couldn't find the EGR valve either. But i did find the plate that the gasket fits to.
I removed the plate and looked inside a dark hole that had some oil residue puddled in there. I soaked up the small amount of oily substance and replaced the plate with a new EGR gasket that i paid $1.59 for. I thought it to be really weird that there wasn't any EGR vlave on this motor.
I'm glad that it's not just my ranger that this has happened to and mine is 3 years older than yours!
-hooD
Hey man, i just posted this same question in another part of this forum. I have a 91 Ranger with a 3.0L and i couldn't find the EGR valve either. But i did find the plate that the gasket fits to.
I removed the plate and looked inside a dark hole that had some oil residue puddled in there. I soaked up the small amount of oily substance and replaced the plate with a new EGR gasket that i paid $1.59 for. I thought it to be really weird that there wasn't any EGR vlave on this motor.
I'm glad that it's not just my ranger that this has happened to and mine is 3 years older than yours!
-hooD
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Post Fiend
Joined: Jan 2003
Posts: 9,748
Likes: 16
From: Connecticut
DPFE and EGR: where?!
I've been doing some digging on the subject of DPFE sensors and EGR valves, and whether or not they even exist on the earlier 3.0L Rangers. I think I've come up with something.
The Ford Manual for 1993-94 Rangers has a wiring schematic showing the various sensors and how they are connected to the computer and each other. One of the sensors it shows is the DPFE. However, the manual says that the DPFE is only applicable to engines 'Built After 4/5/93" and that the DPFE is "Not On 498 M/T".
This seems to indicate that the DPFE (and hence the DPFE/EGR system) was not used on the 3.0L Ranger until sometime during the 1993 year, and also probably not used on some trucks through at least a portion of 1994, since I assume that many vulcans built before 4/5/93 were still being installed in some early 1994 models as the engine stock was being used up and replenished with the newer EGR-equipped motors.
Make sense?
The Ford Manual for 1993-94 Rangers has a wiring schematic showing the various sensors and how they are connected to the computer and each other. One of the sensors it shows is the DPFE. However, the manual says that the DPFE is only applicable to engines 'Built After 4/5/93" and that the DPFE is "Not On 498 M/T".
This seems to indicate that the DPFE (and hence the DPFE/EGR system) was not used on the 3.0L Ranger until sometime during the 1993 year, and also probably not used on some trucks through at least a portion of 1994, since I assume that many vulcans built before 4/5/93 were still being installed in some early 1994 models as the engine stock was being used up and replenished with the newer EGR-equipped motors.
Make sense?
Thread
Thread Starter
Forum
Replies
Last Post
SinisterSS
Explorer, Sport Trac, Mountaineer & Aviator
3
Jan 28, 2004 04:12 PM
