EFI Relay

[War Sprout]

I want a picture of exactly what I need to unplug, circled in red or pointed out, if possible. The last thing I want to do is sabotage my vehicle when it already needs some work. I get about 16 mpg highway with 265/75/16 ATs.

I have a 1997 4runner limited 4x4 automatic 3.4 liter.

Someone just go outside, and take a cell phone pic or something.

Reset EFI relay:
When you buy a used vehicle, you want to reset the EFI relay. Its a trade secret among used auto dealers. The reason for this is the EFI map that the vehicle has set to work with its past driver. When you reset this map, the vehicle forgets how the old driver used to drive and learns how you drive. It picks up on how you accelerate, how you cruise, etc and maps the fuel injection to follow. It takes about 1 tank of gas for it to establish a new EFI map. Doing this will not always net an MPG gain, but it will make the vehicle feel more peppy. Even if you don't reset the EFI relay, the vehicle is always adjusting it's EFI map and will eventually get used to you, but resetting it is a lot more effective.

 

[mcaz5]

Go look in the fuse box under the hood. Pull the cover off and then look at the diagram on the cover and find the one labeled EFI then pull out the corresponding relay for about 30 mins. Relays are the solid black block looking objects. Put it back in and you're good to go. About as simple as it gets

Edit: I would go take a picture but its dark outside and cold. Also fuse and relay locations vary on the different years but you should easily be able to find it on the diagram

 

[War Sprout]

Go look in the fuse box under the hood. Pull the cover off and then look at the diagram on the cover and find the one labeled EFI then pull out the corresponding fuse for about 30 mins. Put it back in and you're good to go. About as simple as it gets

Edit: I would go take a picture but its dark outside and cold. Also fuse locations vary on the different years but you should easily be able to find it on the diagram

Those are the parts I don't get.

A) There are 2 EFI labels, not one. One is large and on the bottom right of the box, while the other is smaller, and on the left side more towards the middle.

B) The guide calls it a relay, but you call it a fuse. Which one is it?

I'll edit in a sec for a picture of mine.

 

[nissanh]

I get about 16 - 17 MPG too. 265 75 16. I replaced plugs, AFR sensor (denso), OEM air filter. I noticed this big difference after moving to Louisiana. I had the same truck back in Reno NV and it did 20 MPG. I traveled a lot to Los Angeles / San Fransisco /San Diego and always 20-21 MPG.

I think the quality of gas in this part of the country is not so good. That may be the reason why gas is about $ 0.50 to 0.75 cheaper per gallon compared to West coast.

Currently I am trying to hunt down a 4 cylinder 4x4.

 

[coreyray7]

I get about 16 - 17 MPG too. 265 75 16. I replaced plugs, AFR sensor (denso), OEM air filter. I noticed this big difference after moving to Louisiana. I had the same truck back in Reno NV and it did 20 MPG. I traveled a lot to Los Angeles / San Fransisco /San Diego and always 20-21 MPG.

I think the quality of gas in this part of the country is not so good. That may be the reason why gas is about $ 0.50 to 0.75 cheaper per gallon compared to West coast.

Currently I am trying to hunt down a 4 cylinder 4x4.

I'm in deep east Texas (pretty sure I'm getting the same quality you are or close to it) I'm currently getting 19.8 (according to the avg mpg indicator on the dash). I just got it Wednesday and have only gone through a half tank, so I will do the actually numbers when I fill up. I'm running a 2006 sport edition with 265/65/17. It still has the stock air filter and hippie filter. Right before I fill up, I'm pulling the hippie filter off and putting a k&n filter in.

 

[mcaz5]

Those are the parts I don't get.

A) There are 2 EFI labels, not one. One is large and on the bottom right of the box, while the other is smaller, and on the left side more towards the middle.

B) The guide calls it a relay, but you call it a fuse. Which one is it?

I'll edit in a sec for a picture of mine.

I re-edited my post but I think you had already quoted me before I did. I read back through and realized I said fuse and not relay, the fuses are the multicolored smaller ones. The relay is the large black box shaped one. That's the one you want to pull. Pull it out and come back in 30 mins and put it back in and you're good to go. You probably won't notice any difference until your 2nd tank, you may not even notice a difference at all.

 

[coreyray7]

So far it's been about 80% highway (75mph)

 

[War Sprout]

I get about 16 - 17 MPG too. 265 75 16. I replaced plugs, AFR sensor (denso), OEM air filter. I noticed this big difference after moving to Louisiana. I had the same truck back in Reno NV and it did 20 MPG. I traveled a lot to Los Angeles / San Fransisco /San Diego and always 20-21 MPG.

I think the quality of gas in this part of the country is not so good. That may be the reason why gas is about $ 0.50 to 0.75 cheaper per gallon compared to West coast.

Currently I am trying to hunt down a 4 cylinder 4x4.

I'm going down the list. I'm just going to troubleshoot everything, because it has a questionable history and I picked it up a few months back. Have you tried sea foam and cleaning the throttle body and MAF sensor? Those are on my to-do list along with an oil change, o2 sensors, plugs and resetting the EFI. Oh, and now I'm going to try different gas stations, because you might be right about that.

And clean it.... Clean cars get better mileage than dirty ones. Had a guy today ask me how I managed to get mud on the inside of the 4runner. Through the sun-roof, of course!

Oh, and good luck with your hunt! I wonder how the 4-cylinder would perform with 4x4 and 265/75, though.

 

[War Sprout]

I re-edited my post but I think you had already quoted me before I did. I read back through and realized I said fuse and not relay, the fuses are the multicolored smaller ones. The relay is the large black box shaped one. That's the one you want to pull. Pull it out and come back in 30 mins and put it back in and you're good to go. You probably won't notice any difference until your 2nd tank, you may not even notice a difference at all.

Thank you, sir. That is exactly what I needed to know.

I'm in deep east Texas (pretty sure I'm getting the same quality you are or close to it) I'm currently getting 19.8 (according to the avg mpg indicator on the dash). I just got it Wednesday and have only gone through a half tank, so I will do the actually numbers when I fill up. I'm running a 2006 sport edition with 265/65/17. It still has the stock air filter and hippie filter. Right before I fill up, I'm pulling the hippie filter off and putting a k&n filter in.

Right now I could only dream of 19.8 mpg. I put about 400 miles a week on it, so it really adds up. What city in east Texas are you?

 

[War Sprout]

This sucker will not come out. I feel like I'm going to break it if I keep pulling on, but I don't see a clip anywhere.

Do I just need to man-up on this one, or is there a clip that I'm about to break?

Edit: Nevermind, I got it with some pliers. There's no clip, it's just in there pretty good.

 

[nissanh]

I'm in deep east Texas (pretty sure I'm getting the same quality you are or close to it) I'm currently getting 19.8 (according to the avg mpg indicator on the dash). I just got it Wednesday and have only gone through a half tank, so I will do the actually numbers when I fill up. I'm running a 2006 sport edition with 265/65/17. It still has the stock air filter and hippie filter. Right before I fill up, I'm pulling the hippie filter off and putting a k&n filter in.

K and N filters are very noisy on freeway, so keep your OEm air filter box and tubes just in case.

Can't you do the same thing by removing the ground terminal for 30 minutes?

 

[coreyray7]

Thank you, sir. That is exactly what I needed to know.



Right now I could only dream of 19.8 mpg. I put about 400 miles a week on it, so it really adds up. What city in east Texas are you?

Nacogdoches/lufkin

 

[coreyray7]

K and N filters are very noisy on freeway, so keep your OEm air filter box and tubes just in case.

Can't you do the same thing by removing the ground terminal for 30 minutes?

I have heard from a few people that its a little louder at idle and low rpms but at highway speed they haven't noticed a change. I know where I'm at the road makes up 75% of your noise, 15% from the air, and 10% tires (I'm running what came on it for now toyo open country HT (265/65/17) but I'll be putting on my wheels and tires (nitto Tera grapplers 265/70/17) from my previous ride (gmc canyon) this next week.

 

[War Sprout]

Nacogdoches/lufkin

Is there a particular gas station you use up there? Specific octane rating?

 

[coreyray7]

Krogers, which they get their gas delivered by a company called TransEastern out of the Tyler/Longview area.

 

[coreyray7]

I have yet to have to fill up in the 4R yet.

 

[coreyray7]

But when I do, I'll probably use 89

 

[coreyray7]

If your LBJs have 150k or 10 years replace them. It is that simple.

Is anyone else seeing this? Or is it just me because I'm using an app?

 

[GreyBush]

I want a picture of exactly what I need to unplug, circled in red or pointed out, if possible. The last thing I want to do is sabotage my vehicle when it already needs some work. I get about 16 mpg highway with 265/75/16 ATs.

I have a 1997 4runner limited 4x4 automatic 3.4 liter.

Someone just go outside, and take a cell phone pic or something.

Reset EFI relay:
When you buy a used vehicle, you want to reset the EFI relay. Its a trade secret among used auto dealers. The reason for this is the EFI map that the vehicle has set to work with its past driver. When you reset this map, the vehicle forgets how the old driver used to drive and learns how you drive. It picks up on how you accelerate, how you cruise, etc and maps the fuel injection to follow. It takes about 1 tank of gas for it to establish a new EFI map. Doing this will not always net an MPG gain, but it will make the vehicle feel more peppy. Even if you don't reset the EFI relay, the vehicle is always adjusting it's EFI map and will eventually get used to you, but resetting it is a lot more effective.

Here is a picture of my 2001 Limited Fuse box

 

[TheDurk]

As far as I know, on our trucks, you can just pull the EFI fuse. No need to pull the relay. In fact, just the relay won't work. The point is to cut power to the ECU and force it to re-learn its settings. The volatile memory power bypasses the relay.