Have code 71! yeah I know its the EGR

94toy4x4fever · 05-17-2008, 09:07 PM

I know that code 71 is something to do with the EGR! So were do you guys think is the best palces to start trying to find out what the problem is!

904_runner · 05-17-2008, 09:16 PM

Start by seeing if the egr valve is working. You can pull off a vacuum line and replace it with the one at the top of the egr and see if it will open.

94toy4x4fever · 05-17-2008, 09:42 PM

well I tryed that, I pulled a vaccum line off of the intake. Thats right, right! Pull a line off that has suckion right? I did do that and it did not stall out/ sputter. Does that mean I need a new EGR valve? I know all my vaccum lines are hooked up right! I went over the diagram a few times! I just want to make 100% sure it is the EGR valve before I go and spend like 180 bones on it!

ozziesironmanoffroad · 05-17-2008, 09:42 PM

a neighbor mechanic told me today if its throwing a EGR code, and its not fixed, the computer will screw with the mixture and fry the fuel injectors and clog up the cat. converter... i doubt this is true, but maybe you might want to look into it... i sure am...

94toy4x4fever · 05-17-2008, 09:44 PM

yeah got ya! I dont have a cat on the truck (yeah i know there will be some guys give me crap for that) and also the truck is running rich! Im going to buy new injectors soon!

904_runner · 05-17-2008, 09:58 PM

Sounds like the EGR is bad.

94toy4x4fever · 05-17-2008, 11:02 PM

Anyone else have any ideas? Thanks to everyone that has helped

anotherjeff · 05-18-2008, 01:24 AM

If it does not stumble/stall when vacuum is applied (Use your mouth!) to the EGR valve, then it's NOT functioning. This is the same test that's required for smog check (except the techs have nifty MityMite pumps).

Non-functioning EGR valves can be caused several things, with "clogged passages" being high on the list. Running "rich", huh?

94toy4x4fever · 05-18-2008, 02:13 PM

yeah had it smoged for warrenty on my engine and they told me it is running rich

abecedarian · 05-18-2008, 02:16 PM

running rich (high hydrocarbon emissions/ HC) does not mean that the EGR is bad. running rich at 'cruise' RPM's points a tad towards the EGR but doesn't mean much either though.
Now on the other hand, high NOx readings at cruise would point to the EGR.

Team420 · 05-18-2008, 02:24 PM

Quote:

Originally Posted by 94toy4x4fever

yeah got ya! I dont have a cat on the truck (yeah i know there will be some guys give me crap for that) and also the truck is running rich! Im going to buy new injectors soon!

If you dont have a cat on the truck...why worry about the egr...just bypass it and call it good, you already fail emmisions tests due to the lack of a cat, or at least in the state of maine you do.

94toy4x4fever · 05-18-2008, 02:33 PM

yes had high Nox reading at cruise! So EGR. Cuz Im about to go out the door and get a new one!

js9924 · 05-18-2008, 02:42 PM

Quote:

Originally Posted by Team420

If you dont have a cat on the truck...why worry about the egr...just bypass it and call it good, you already fail emmisions tests due to the lack of a cat, or at least in the state of maine you do.

I second this. There is no point in picking and choosing which emissions equipment you want. Also dont forget to check the filter in the modulator before the EGR. Shove a 10 k resistor in the connector for the temp sensor and the code will disappear. click on the link in my sig and you will find a write-up under the projects section.

94toy4x4fever · 05-18-2008, 03:52 PM

ok I dident get a egr because the parts house dident have the gasket for it so I will wait! I looked at the egr mod filter and it looks nice and clean! Im just trying to ge tto the bottem of this stuff. Truck runs good and has good power it just pings a little and throws a check engine light after driving in the highway for a while!

05-17-2008, 09:07 PM	#1 (permalink)
94toy4x4fever Registered User Join Date: Mar 2008 Location: Lewiston, Idaho Posts: 177	Have code 71! yeah I know its the EGR I know that code 71 is something to do with the EGR! So were do you guys think is the best palces to start trying to find out what the problem is! __________________ 94 toyota pickup. Work in progress! 22re w/ RV cam pacesetter header K&N cold air 31" cooper stt's Want to do: SAS, Lift, 35" tires change gears, V6 swap

05-17-2008, 09:16 PM	#2 (permalink)
904_runner Registered User Join Date: Mar 2008 Location: Chico, California Posts: 1,013	Start by seeing if the egr valve is working. You can pull off a vacuum line and replace it with the one at the top of the egr and see if it will open. __________________ -Mike 1990 4runner SR5, 3.0 with 250K, 5-speed, 4.56 gears, warn premium hubs, Hella 500's, Rancho 9000's, 33X12.50's crappy dunlop tires, rear lock right, 4" trailmaster lift with lc coils in rear Soon to come: New wheels and tires, Sliders, CB. One Day: 3.4 swap!

05-17-2008, 09:42 PM	#3 (permalink)
94toy4x4fever Registered User Join Date: Mar 2008 Location: Lewiston, Idaho Posts: 177	well I tryed that, I pulled a vaccum line off of the intake. Thats right, right! Pull a line off that has suckion right? I did do that and it did not stall out/ sputter. Does that mean I need a new EGR valve? I know all my vaccum lines are hooked up right! I went over the diagram a few times! I just want to make 100% sure it is the EGR valve before I go and spend like 180 bones on it! __________________ 94 toyota pickup. Work in progress! 22re w/ RV cam pacesetter header K&N cold air 31" cooper stt's Want to do: SAS, Lift, 35" tires change gears, V6 swap

05-17-2008, 09:42 PM	#4 (permalink)
ozziesironmanoffroad Contributing Member Join Date: Sep 2007 Location: Spring Valley, CA Posts: 3,331	a neighbor mechanic told me today if its throwing a EGR code, and its not fixed, the computer will screw with the mixture and fry the fuel injectors and clog up the cat. converter... i doubt this is true, but maybe you might want to look into it... i sure am... __________________ 1988 Toyota P/U 4x4 22RE 258,000 miles on original motor pioneer CD deck 31x10.50x15 BFG A/T BAJA 100W lights on prerunner bumper KC Daylighters 100W rancho rs5000 MUD IS A VALID PAINT JOB! If not living life to the fullest, why live it? you just hung a vacancy sign on your ass, and my foot's looking for a room my trucks official buildup thread

05-17-2008, 09:44 PM	#5 (permalink)
94toy4x4fever Registered User Join Date: Mar 2008 Location: Lewiston, Idaho Posts: 177	yeah got ya! I dont have a cat on the truck (yeah i know there will be some guys give me crap for that) and also the truck is running rich! Im going to buy new injectors soon! __________________ 94 toyota pickup. Work in progress! 22re w/ RV cam pacesetter header K&N cold air 31" cooper stt's Want to do: SAS, Lift, 35" tires change gears, V6 swap

05-17-2008, 09:58 PM	#6 (permalink)
904_runner Registered User Join Date: Mar 2008 Location: Chico, California Posts: 1,013	Sounds like the EGR is bad. __________________ -Mike 1990 4runner SR5, 3.0 with 250K, 5-speed, 4.56 gears, warn premium hubs, Hella 500's, Rancho 9000's, 33X12.50's crappy dunlop tires, rear lock right, 4" trailmaster lift with lc coils in rear Soon to come: New wheels and tires, Sliders, CB. One Day: 3.4 swap!

05-17-2008, 11:02 PM	#7 (permalink)
94toy4x4fever Registered User Join Date: Mar 2008 Location: Lewiston, Idaho Posts: 177	Anyone else have any ideas? Thanks to everyone that has helped __________________ 94 toyota pickup. Work in progress! 22re w/ RV cam pacesetter header K&N cold air 31" cooper stt's Want to do: SAS, Lift, 35" tires change gears, V6 swap

05-18-2008, 01:24 AM	#8 (permalink)
anotherjeff Registered User Join Date: Oct 2007 Location: near Redding California Posts: 191	If it does not stumble/stall when vacuum is applied (Use your mouth!) to the EGR valve, then it's NOT functioning. This is the same test that's required for smog check (except the techs have nifty MityMite pumps). Non-functioning EGR valves can be caused several things, with "clogged passages" being high on the list. Running "rich", huh?

05-18-2008, 02:13 PM	#9 (permalink)
94toy4x4fever Registered User Join Date: Mar 2008 Location: Lewiston, Idaho Posts: 177	yeah had it smoged for warrenty on my engine and they told me it is running rich __________________ 94 toyota pickup. Work in progress! 22re w/ RV cam pacesetter header K&N cold air 31" cooper stt's Want to do: SAS, Lift, 35" tires change gears, V6 swap

05-18-2008, 02:33 PM	#12 (permalink)
94toy4x4fever Registered User Join Date: Mar 2008 Location: Lewiston, Idaho Posts: 177	yes had high Nox reading at cruise! So EGR. Cuz Im about to go out the door and get a new one! __________________ 94 toyota pickup. Work in progress! 22re w/ RV cam pacesetter header K&N cold air 31" cooper stt's Want to do: SAS, Lift, 35" tires change gears, V6 swap

05-18-2008, 03:52 PM	#14 (permalink)
94toy4x4fever Registered User Join Date: Mar 2008 Location: Lewiston, Idaho Posts: 177	ok I dident get a egr because the parts house dident have the gasket for it so I will wait! I looked at the egr mod filter and it looks nice and clean! Im just trying to ge tto the bottem of this stuff. Truck runs good and has good power it just pings a little and throws a check engine light after driving in the highway for a while! __________________ 94 toyota pickup. Work in progress! 22re w/ RV cam pacesetter header K&N cold air 31" cooper stt's Want to do: SAS, Lift, 35" tires change gears, V6 swap

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