I'd like to know something about this resistor thing too. I have a light on for the EGR now beacause it's prob leaking somewhere or something, and would like to get ride of it. I'm going to block off the EGR in the spring too

 

the egr sensor is on the intake end of the egr pipe coming from the exhaust manifold. it screws in into the pipe with a 12mm? and has two wires coming out.

double check the cel code, there may be another problem it is
detecting

-chuck

 

If the ECU is just looking for a temperature, a regular resistor should work. Check the FSM for the specs.


- Greg -

 

the egr sensor is on the intake end of the egr pipe coming from the exhaust manifold. it screws in into the pipe with a 12mm? and has two wires coming out.

This is what I am looking for. I think we are talking out two different things. You are talking about the temp sensor (probably because that is what I called it, stupid me). I am talking about this harness.

More info can be found here

 

I think we're basically trying to solve the same problem, to get rid of the SES light with the EGR unplugged.

 

Yes I do believe we are. This is the most frustrating thing ever. I know what I need to do, I know what I need to do it, I just can't find that damn plug!!!! Someone please help!

 

well after looking at the back of my engine for about an hour while holding fsm diagrams I do believe I finally see the stupid plug. If somone can confirm or deny that I found it please chime in. Here is what I see (pics will be coming tonight). Back of the engine bay directly below the absolute pressure sensor (which is fixed to the firewall) there is the wiring harness. At this very point there is a small wire wich is 2 smaller black wires wrapped together, a medium wire which runs to the tps crap and splits off into two plugs on the intake, and then on the other side of the small wire there is an oblong gray plug. I can only assume the two smaller wires are for the egr temp sensor and the oblong gray plug which it appears to be attached to is the EGR temp harness I have been searching for!

An easier way to see it would be to stand in front of the passenger wheel well. Look between the engine and the firewall. You should see the back of the plug I am talking about. It will be a gray plug with a strip of green on the wire right before the plug.

If anyone thinks this could be anything else please let me know. I will probably stick the resistor in there tonight or tomorrow.

 

zoomed out

zoomed in

close up

close up view from driver side

Here are the pics I promised! Is this the right plug? I know the car is dirty, it just snowed hear. These pics are huge so it might take awhile to open. Please let me know!

 

So nobody can confirm if this is the right plug or not?

Anyway I got the code pulled the other day. It was code p0400a, egr malfunction. Does anyone know if the resistor would fix this problem, or of any fix for this problem. At this point I am even willing to try and hook the egr back up. If someone has a write up on it or some part numbers for hose and fittings or anything that would be great! Need some serious help here G20.net!

 

So nobody can confirm if this is the right plug or not?

your in the right area, on the drivers side by the TB. It should be a two point harness, probably the only one near there.

Youll want to put in about a 800K-1000K ohm resistor in there. But thats only if your temp sensor is bad, you can be getting the code if your EGR solenoid is bad too...but the resistor trick shold bypass that.

page EC-364 in the 99 FSM pdf.

 

So your saying its not the one in the picture? This is the only oblong oval gray harness anywhere near there? So the resistor would clear code p0400? The pic on EC-364 was the picture I was holding when I found that harness.

 

So your saying its not the one in the picture? This is the only oblong oval gray harness anywhere near there? So the resistor would clear code p0400? The pic on EC-364 was the picture I was holding when I found that harness.

The resistor should clear that code...thats what the ECU is looking for, a resistance reading as the temp goes up. That then actuates the solenoid.

Youll have to find the right connector, if you have the FSM it shouldnt be too much of a problem. Follow the harness to where the sensor is at to be certain.

 

I can't reach down where I believe the sensor is. Off of the harness in my pics there is a small black wire that runs to the bottom of the intake manifold. I believe this wire is to the egr temp sensor. It's really two smaller black wires with a wrap around it. If you or anyone else is unsure if what I have taken a photo of is the right harness please let me know what else you think this harness might be. I don't have an fsm but I just printed practically the entire EC manual from phatg20.net.

This is a pic from sr20 forums of the harness. Doesn't the close up pic I took look just like the back of this harness. egr harness

 

maybe someone can find the harness on their car take pic and send it to me. This way I can confirm that the harness in my pic is or isn't the correct one.

 

When I do stick the resistor in there how do I know it worked. Would the light go off right away or after a few hours of driving? Do I have to reset the ecu and hope the light doesn't come back on?

 

yes, youll probably have to reset the ECU.

 

If the resistor does work would I pass emissions? They don't do the sniffer or anything. They just plug me into the computer. In theory if the ecu thinks the egr is hooked up so should the emissions computer? I do not believe there is a visual or anything.

 

All depends if they do the Emissions Readiness check. I doubt you'll pass the readiness, because your EGR temp signal will not change based on driving style. The ECU has some strange learning curve that tells you if the system is "ready". The lack of the CEL does not mean the emissions system is "ready". I dont believe the rear O2 SIM will pass Emissions Readiness for the same reason.


- Greg -

 

All depends if they do the Emissions Readiness check. I doubt you'll pass the readiness, because your EGR temp signal will not change based on driving style. The ECU has some strange learning curve that tells you if the system is "ready". The lack of the CEL does not mean the emissions system is "ready". I dont believe the rear O2 SIM will pass Emissions Readiness for the same reason.


- Greg -

Why would the egr temp signal change at all. The car isn't on the rollers or anything. Supposedly they just plug it in. Here is a quote taken right from the CT emissions website.

"Tests for Vehicles 1996 and Newer

Newer vehicles are tested using technology that uses the vehicle's OBD (on-board diagnostics) computer system to diagnose operations of emissions control systems. The new test will help ensure that today's newer, low emissions vehicles with their advanced computerized emissions controls continue to run clean and efficiently.

The OBD test is quick and easy. The inspector connects your on-board computer, which continuously monitors the engine and emissions controls, to the inspection computer and downloads the data. The results are printed on the Vehicle Inspection Report (VIR) that you receive at the end of the test"


The pre 95 tests talks about rollers or putting it on the dyno but the post 95 doesn't mention any of that. If the resistor isn't going to help me pass then it would be pointless to do. Stupid EGR!!!! I'm recirculated exhaust gas with my damn gt28r! That should be enough.

 

Why would the egr temp signal change at all. The car isn't on the rollers or anything. Supposedly they just plug it in. Here is a quote taken right from the CT emissions website.

It's not a test under load. The readiness test is something that occurs inside your ECU. The computer measures performance under multiple driving situations and will declare the emissions system "ready" if everything jumps through the right hoops in the right order. You can eliminate the CEL by immediately fixing the sensor, but the system will not be earmarked as "ready" until much later, if at all.

If the resistor isn't going to help me pass then it would be pointless to do. Stupid EGR!!!! I'm recirculated exhaust gas with my damn gt28r! That should be enough.

Like I said, it may or may not pass you. It's a 10 cent resistor so you may as well try it. If you fail they should give you one free retest.

Also youre not recirculating any exhaust gas with your turbo -- it's all going out your tail pipe


- Greg -

 

But will it get rid of the CEL light? Because that's all I need

 

Koojo im in the same boat as you, If any of you guys figure out how to tear out the EGR let me know and take some pictures. Ive got the same CEL and my whole EGR systems coming out. I love how florida doesnt check emmisions.

 

Koojo im in the same boat as you, If any of you guys figure out how to tear out the EGR let me know and take some pictures. Ive got the same CEL and my whole EGR systems coming out. I love how florida doesnt check emmisions.

Ya they don't check emissions here either.....but you can't have the CEL light on. And plus I've been staring at that damn light for almost 9 months now....I would rather have it be off.

 

Like I said, the resistor should get rid of the CEL. If however they plug a diagnostic tester into your OBDII port and require "Emissions Readiness", you may still fail.


- Greg -

 

well I gotta better chance with the light off than on. They won't even pull the car in if the light is on. I really do hope the resistor gets rid of the dam light. I read a few other posts and people who put the resistor in said their light shut off after several miles and a few starts. They mention nothing of resetting the ecu. I am not gonna resett the ecu right away. I will take the car on a nice trip first and then reset it.