EGR help

[NateFrame]

Hi folks. Trying to get my laser running right. Currently I have found many problems that IMO not really fixable with nuts and bolts so to speak. All my vac. lines are gone. I am not shure if this is responisble for the extremly high idle (3000rpm) on a cold start. So playing with the idle adj screw I get them down to where they should be, but after warm up it will not idle at all. Went for a 5 mile drive and then was coasting in neutral to a stop sign and the engine died.

I did get this car cheap and it was rough looking. I have basically restored this thing, funny to say restore in the same sentence talking about a car thats only like 15 years old, but it needed it.

I decided to try to "reconstruct" the vac. line system. No such luck there, by reading the under hood diagram. It says there is an EGR system, which to me makes no sense, because on all my other cars with EGR there is auctually a visible line off the exhaust manifold to a control valve, then it dumps into the intake. I have had the hole turbo, exhaust manifold assembly off before and I just see no physical way for there to be an EGR system on this car.

I do assume that EGR means Exhaust Gas Recirculation, so the exhaust must come from some where. It is possible that the diagram under the hood is not the right one, but alot of the stuff on it matches up.

All the vac line connection ports have been capped, so I am not shure you could attribute the idle problem to a vac. leek, and anyways random idle changes are uasually tracted to vac. leeks.

But my hole system has been removed, so it seems that leeks are kinda crossed off the list of possibilities.

thanks for any and all help, -nate-

 

[DSMunknown]

Nate, I'm a little confused as to what you're asking. Here, check out these two links:





Post #6
http://dsmtuners.com/forums/showthread.php?t=249879




As you can see, the second link I gave is my write-up. I'm not sure how urgent you need to get this done, but I will post up my photos by tomorrow. So if you can wait until then, I will post up some decent shots I took of where exactly you can find the EGR valve.

And yes, EGR stands for Exhaust Gas Recirculation valve.

 

[NateFrame]

sorry for being so blunt.

I would like to know how you can have EGR with no visible way for the exhaust gasses to go anywhere else but thru the turbo and out the rear of the car.
and if all these mods that were done are responisble for my cold idle and hot stalling that I have been experiencing?
I did read your write up before I made this post and it is very good. I dident see any such set up on my car. I wish I could tell you more about it, but I am very much in the dark.

thanks, -nate-

 

[Auto RS T]

Check to see that the Idle Posistion Switch (IPS) on the throttle body is adjusted properly and that the green wire has not broken off. That could cause your high idle.

The EGR valve on our cars is actually located on the intake manifold below the throttle body. The valve is held on with two bolts. It gets the exhaust gases from a port in the head instead of the tube you are used to seeing. If you remove it you will see the port into the intake manifold, it will most likely have a carbon buildup on it.

As for vacuum leaks check to make sure the nipples on the intake manifold and throttle body have the proper lines running to them and that nipples not in use are capped off.

 

[NateFrame]

I know about the idle adj. screw. But is the switch something totally different?

I believe all vac. systems are capped off. Where is the EGR port located in reference to the head. Is it under the intake manifold?
thanks, -nate-

 

[91 Turbo Mitsu]

It sounds like someone has done the taboo speedshop vacuum line removal. They may have also removed the egr valve and put on a blockoff plate. If you reach straight down from the throttle body to the intake manifold that is where the egr valve should be. It is on the side of the intake about three inches from the head. As far as the high idle when you adjusted the biss screw did you follow the directions for doing it. You cant just turn the screw. Grab a can of carb cleaner and start spraying around and see if you can find a vacuum leak anywhere. Keep us posted. Travis

 

[DSMunknown]

Where is the EGR port located in reference to the head. Is it under the intake manifold?

Nate, I just posted up some photos. Use them for your reference. The second picture in post #3 is the best one I took and shows exactly where you can find the EGR valve.



http://www.dsmtuners.com/forums/showthread.php?t=249879post#3