EGR question
Thread Starter
|
Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
EGR question
I applied a vacuum to my EGR and looked at the valve inside. It would open up with the vac applied, but the truck neither idled down or stalled. I thought this was odd and went and did the same to my dads '94 F250 and his truck had idled down a bunch with the vac applied. My EGR had help vac, but the green vacuum hose that was connected to it had no vacuum. Is this a sensor problem? Is the EGR not functioning properly (not making the truck idle down with vacuum)?
Vehicle:
1989 F250 w/ 351w
4.10 gears
C6 tranny
31,000 orig. miles
33x12.50x16.5 Truxus Mud Terrains
Flowmaster Exhaust
K&N FIPK
GAS HOG (6 mpg, if lucky 7.3)
^^ not really worried about discussing MPG issue in this post, but any suggestions are welcome
Vehicle:
1989 F250 w/ 351w
4.10 gears
C6 tranny
31,000 orig. miles
33x12.50x16.5 Truxus Mud Terrains
Flowmaster Exhaust
K&N FIPK
GAS HOG (6 mpg, if lucky 7.3)
^^ not really worried about discussing MPG issue in this post, but any suggestions are welcome
Thread Starter
|
Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
Im taking EGR off and cleaning it in about 5 mins, then im going to take the sensor up to Advanced Auto and have them see if its sending signals and what not to the computer. Ill post what i find out when im finished.
Der Postmeister
Joined: Sep 2006
Posts: 6,859
Likes: 560
From: Long Beach, Calimexiforia
The small vac hose feeding the valve is its actuator solenoid. valve is dormant until solenoid energized. Testing or comparisons in behavior requires closed loop function (195F) operational temp. 31K. Let me guess. Did it just appear in a cloud of smoke w/ a big naked guy asking for your clothes & a pair of sunglasses? Did he give you the pink or say "I'll be back!" Anyway, 31k miles shouldn't result in a clog unless alot of short trips w/o getting out of warm up cycle occured. Then most consintrated at the port opening. Scans for error codes should ID your problem if there is one. Get a can of seafoam & run through air intake if its acting kinda like you when you first wake up in the morning!
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
I saw that it was '89, and did not notice the ultra low mileage....
Post Fiend
Joined: Jan 2005
Posts: 8,402
Likes: 10
Surely has to be otherwise why is it when the EGR valve opens (which he proved it does) is there no change in engine revs?
Trending Topics
Post Fiend
Joined: Jan 2005
Posts: 8,402
Likes: 10
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
I took the EGR off and replaced the EVP while it was off, and it didn't look too dirty. No significant carbon build up.
Thread Starter
|
Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
Update
Okay, i took off the EGR and looked at it and everything. It wasnt clogged with carbon build up, and neither was the port to the motor. I changed the EVP and put it back on the truck, applied vac, and the RPMs when wayy down. 
Still the issue with getting vacuum to the EGR. I checked the green vacuum hose for cracks and kinks. there were none. Took it off and blew into it to see if it was clogged. It wasn't. So now im stumped. Help, anyone?
Still the issue with getting vacuum to the EGR. I checked the green vacuum hose for cracks and kinks. there were none. Took it off and blew into it to see if it was clogged. It wasn't. So now im stumped. Help, anyone?
Lead Driver
Joined: Nov 2002
Posts: 9,555
Likes: 40
From: Concord, NC
Have you driven the truck since you replaced the EVP? The EGR valve does not get a constant vacuum signal, it varies with engine load/throttle position and rpm (maybe even ground speed, but that's just guessing).
Thread Starter
|
Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
Ive drivin the truck about 15 miles since ive replaced the EVP. How long will it take for the computer to clear the code, if it is in fact working?
Der Postmeister
Joined: Sep 2006
Posts: 6,859
Likes: 560
From: Long Beach, Calimexiforia
After reaching norm. oper. temp. when someone revs the accelorator does the EGR react w/ movement? And what code #'s do you have? Could you be more specific exactly what drivability problem you where having? Or you thought something else should have happen when you pulled off the vac hose ?
Thread Starter
|
Cargo Master
Joined: Oct 2008
Posts: 2,308
Likes: 1
From: Elyria, OH
After reaching norm. oper. temp. when someone revs the accelorator does the EGR react w/ movement? And what code #'s do you have? Could you be more specific exactly what drivability problem you where having? Or you thought something else should have happen when you pulled off the vac hose ?