Well, I don't know anything specific about the AFR calibrator box, just that it is supposed to achieve the same thing- make the ECU think it's at shoich mix when it isn't. My FTC1-E basically has a built-in ESC1, but I can program the pressure it turns on at (where as the ESC1 turns on at 1 psi, non-adjustable).

For the future, I am interested in possibly trying out another thing some time when I'm bored- use my Wideband O2 sensor system to simulate the narrow-band oxygen sensor signal, and get rid of my stock narrow-band oxygen sensor all together. I'm curious if it could help with some of the narrow-band's limitations, and if it doesn't really do anything for me I can just go back to stock...

EDIT: By the way Mark, I saw these new injectors URD has and thought they wree interesting: 390cc Lucas Disc Injectors. They're actualy cheaper than the 318cc Bosch Injecotrs...

 

Or better yet in Santa Fe or Durango

 

Hey Santa Fe's fine with me, it's only 30 minutes from my house

 

Hmmm... One of the things that I learned getting my 370's cleaned this time was how important spray patter can be. The 370's I'm running don't have an angled nozzle, so the fuel comes out more as a stream versus a spray, which could have contributed to my melt-down.

These Lucas discs sound like they have a mechanism that produces a nice spray.


So... maybe THAT's the next thing to go belly up... I get the engine back together, we turn the key, (IT RUNS!) I drive it for a while and realize I can't tune it. I go see my injector guy and we talk more about spray patterns, and next thing ya' know - I'm spending more money with URD (argh).

 

LOL sorry dude, just thought they sounded interesting with the way they open and all... The description says their design can help with idling too... I'm going to keep them in mind for the future.

 

The URD AFR Sensor Calibrator is very different then the Split Second ESC1.

The URD AFR Sensor Calibrator is for the newer trucks with the new style air/fuel ratio sensor as opposed to the old style O2 sensor. The air/fuel ratio sensor is Denso's version of a wideband sensor. Much more accurate then an O2 sensor. It gives a direct indication of fuel mixture as opposed to an O2 sensor which can only report if the mix is richer or leaner then 14.7:1, but not the exact mixture.

The URD AFR Sensor Calibrator is a mappable unit that uses a true 3 dementional map table like the URD MAF Calibrator or the MAF/Timing Calibrator (FTC1).

It will allow you to alter the fuel mixture in CLOSED LOOP mode and it is very precise and repeatable in its operation. It is best used in combination with a MAF Sensor Calibrator or an additional injector system.

For the 4Runner it is compatable with 1999 Cali and all 2000+ V6 engines.

For the Tacoma, it is compatable with the 2000 Cali and all 2001+ V6 engines.

A complete application guide can be found on the URD site.

Gadget

 

The number of cats has nothing to do with what sensor O2 or AFR you have.

Your truck is a 2000 4Runner. Yours has an AFR sensor and not an O2 sensor.

Gadget

 

Gadget,

Both sensors on my 4runner (pre and post kitty) have the same plugs, are you sure that I have an AFR sensor? Wouldn't the plugs be different if that were the case? I sure hope your right...

 

I just looked through all the books, Toyota, Denso, and some other resources we have here. I will have to admit that you are absolutely correct. There were some 2000 4Runner V6s that still used the old style O2 sensors.

Thanks for squaring me away on this.

Gadget

 

So what is the easiest way to tell if I have 02 sensors or AFR sensors? I haven't looked at them closely before and I'm not sure what would differentiate the two. I have a 2000 4runner that is federal emissions as well, so I would like to make sure I don't put down the money for a box that isn't compatible.. tia

 

I would say pop you head under your truck and see if both sensors pre and post cat have the same plugs.

 

Yup, look at the plugs and see how many contacts they have. An AFR Sensor has more contacts than a regular O2 sensor (how many I'm not sure, perhaps as many as 5).

 

thank you for the replies.

 

alright, I went out at lunchtime to check it out, and here's what I found:

- Both plugs are about the same size, and both have four wires going from the sensor to the plugs.

- The front sensor had this written on it:
Toyota
89465
-35530
Denso 0640

- The back sensor (post cat) had this written on it:
Toyota
89465
-35380
Denso 7911

I'm trying to find them on the web to see if they are different. Looks like two 02 sensors to me.. I hope I'm wrong though..

 

It'll depend on which engine you have, if you're manual or auto, and if you have CA emissions. "Federal Emissions" doesn't mean anything. California is the issue...

Denso's lookup:
http://www.densoaftermarket.com/cata...&model=4RUNNER

URD's lookup:
http://www.urdusa.com/product_info.p...s_id=430006000


Note that the part number(s) you read off of the parts don't match anywhere.

 

From URD's website:

2000 49 State auto V6; Front = 234-4162
2000 49 State auto V6; Rear = 234-4162

 

'k... but like I said, you need to know if the truck has CA emissions on it.

Did you buy the truck new? and in LA? If so, then it's weird that you have different Denso part numbers front and rear right now.

 

I just got off the phone with Denso and I definitely have two 02 sensors. So I am one of the ones that can't get the AFR Calibrator.

When I purchased the URD Fuel Upgrade kit, they had an option for 95-98 trucks thats included the built in O2 sensor signal conditioner. I chose 2000 since thats what year my truck is (and this obviously didn't include the 02 signal conditioner built in) Does this mean that the FTC1 will not operate correctly because it thinks I have an AFR sensor, when really I don't? tia

 

midiwall: Sorry, I posted before I saw that you had replied.

I was under the impression that since my truck only has one cat, that it does not have CA emissions on it. I bought it used, and they had already had it smog tested. I gave my VIN number to the toyota parts department, and they confirmed that I have two 02 sensors.

 

Just to add to the confusion.. I talked to another Toyota parts department and got one of their technicians on the phone. I gave him my VIN, and he said I have three sensors. Going front to back, he said I have an air fuel sensor, then a front 02 sensor, then the cat, and then the back 02 sensor. I called the first shop again, gave them the VIN, and they also said that I had those three sensors.. Now I'm confused. Is the front air fuel sensor that they speak of not the one that the AFR Calibrator from URD uses to trick the ECU? Or is it a different sensor that has nothing to do with the calibrator...