Plug identification

[bradyc]

After finishing installing a new engine i noticed the 93 manual i pulled the engine out of has a plug as seen in the below pic. it comes from a part that sits under where the intake pipe meets the intake. its got a white wrap around it as seen below.
the plug mounts under the intakes body.
http://i993.photobucket.com/albums/af51/bradyhpi/eclipse/plug3.jpg


On the car that i pulled the engine from the plug for the part comes out of the engine / injector harness. ( the plug im talking about has tape on it). the plug comes out on the harness to the right of the harness clamp that bolts to the intake.
http://i993.photobucket.com/albums/af51/bradyhpi/eclipse/plug2.jpg

And here is where the clamp is, and no wire/plug comes out of the harness for it on the car i put the engine into.
http://i993.photobucket.com/albums/af51/bradyhpi/eclipse/plug1.jpg

what is it? and is it a big deal if its not plugged in?

 

[serviceguy]

EGR Valve Temperature Sensor.

 

[bradyc]

Do i need to wire it? and what will the side effects be if left unplugged?
i noticed that the car may be running a bit rich, and it slightly stutters when i hit the gas out of an idle. Are those symptoms?

 

[serviceguy]

It may throw an engine light at you, possibly stutter and die. I would just connect it and be done with it. Unless you want to hack the ecu (if you can swap the eprom, assuming your ecu came with one).

 

[Boostinsideways]

It may throw an engine light at you, possibly stutter and die. I would just connect it and be done with it. Unless you want to hack the ecu (if you can swap the eprom, assuming your ecu came with one).

Please don't post about things you don't full understand, It just misleads the OP.

If you unplug the egr it will throw a CEL. EGR Is exhaust gas recirculation and is mainly done for emissions but it can help your car get to operating temp faster in cold weather. It will not be a main cause of running rich. If you have a leaky gasket on the manifold it would lead to a slightly rich condition.

Rich conditions are generally due to boost/vacuum leaks, bad fuel pressure regulator, bad Mass Airflow sensor, or bad front o2. As far as the ecu goes. You can turn off the codes if you run dsm link. You would need a eeprom ecu and dsm link to do this.

 

[serviceguy]

Please don't post about things you don't full understand, It just misleads the OP.

If you unplug the egr it will throw a CEL. EGR Is exhaust gas recirculation and is mainly done for emissions but it can help your car get to operating temp faster in cold weather. It will not be a main cause of running rich. If you have a leaky gasket on the manifold it would lead to a slightly rich condition.

Rich conditions are generally due to boost/vacuum leaks, bad fuel pressure regulator, bad Mass Airflow sensor, or bad front o2. As far as the ecu goes. You can turn off the codes if you run dsm link. You would need a eeprom ecu and dsm link to do this.

And how is that any different from what I told him? Have you even ever tried to drive a car with a 94 ecu without the egr temperature sensor connected? Or you want to know exactly what resistor you need to add/remove in order to setup an ecu or what eprom chip is compatible with what setup? I told him exactly that the ecu will throw an engine light (it's what you call CEL). Your solution? Buy ECMLink. Wow, that will beat connecting the egr sensor, if any available, every day of the week. Maybe you should understand what I am talking about before policing the forums. Pumped up from the Shootout, are we?

 

[bradyc]

no need to be getting defensive i understood all of it

I would just connect it and be done with it.


I wouldn't be asking this question if i could just connect it. the problem is that the engine that i pulled from the doner car has this plug coming off it, i believe its a 93 - manual. and the car i put the engine/trans in is my 94 automatic witch does not have a plug for this coming out of the wiring harness... This is why/what im asking.

 

[serviceguy]

no need to be getting defensive i understood all of it

I would just connect it and be done with it.


I wouldn't be asking this question if i could just connect it. the problem is that the engine that i pulled from the doner car has this plug coming off it, i believe its a 93 - manual. and the car i put the engine/trans in is my 94 automatic witch does not have a plug for this coming out of the wiring harness... This is why/what im asking.

Ok, it makes sense now. I sent you a PM, I guess I'll have to dig a little further on the Service Manual so that you can compare the different setup.