Okay I just got another fiero, 88 formula 5 speed 2m6. It is running several codes and one is code 32, failure in EGR system... the valve is there, not sure if it works though (need to jump the vacume line) but anyways I noticed that (What i think is) the control device seems to ve missing some vacume lines and the connection is not pluged in. is there a reason it might not be pluged in? does anyone have any pictures or a diagram of how it works and what goes where? how do I diagnos it?

Kyle

What lines are missing/disconnected?

The vaccumm line routing should be on the emissions sticker on the trunk decklid. The egr control solinoid is directly in front of the thermostat housing and has a 4 prong weather pack connector. Follow the emissions sticker for vacumm routing. FYI, the plastic hoses tend to break and crack over time, Rodney Dickman sells an excellect steel or SS vacumm line kit for the V6....Paul

Okay the big line that goes into the egr control unit is not conected to anything? where exactly does this go? I followed the diagram but it says it goes to the trottle body, there are a few small lines going to that but nothing of this size. ???

Kyle

Oh yea... my Throttle body is made by holley, is this stock or?

Here's a pic I snagged from a post here a while back:
http://web2.airmail.net/jsavage1/images/misc/Vacuum_routing6_1.jpg

The diagram doesn't show the small vacuum line that tees off of the upper solenoid line and wraps around to the vacuum sensor switch that's bolted to the solenoid assembly. You can barely see that in this pic:
http://web2.airmail.net/jsavage1/formula/egrsolenoid.jpg

BTW, if the vacuum switch doesn't detect vacuum when the ECM thinks that it should, the ECM will set the code. In your case the vacuum line may only be disconnected.

There is a large line that connect to the back of the solenoid, that line runs to the air cleaner and is the filtered air supply for the solenoid's vacuum bleed system.

Holley was the contractor that made the throttle bodies for GM, they're all OEM.

JazzMan

[This message has been edited by JazzMan (edited 06-19-2003).]

Okay so that large line is what is not connected. I am geeting a code for it. I noticed I am not getting vacuum at all to the EGR switch, one of those lines should have vacuum al the time right? and the other one just when the computer tells the EGR to open?

Kyle

Hey Kyle, glad to hear you got another Fiero... That 2.8 is a lot more fun than those 4 bangers isnt it? Sorry i cant answer your question about the vacuum to the EGR valve though.... Good luck with it!

Bob

Hmmm okay, Ill have to look for the steel pipe.

Kyle

I would think you would, but i'm not sure. I'll have to check mine tomorrow to let you know for sure. You may have a problem (plugged up) with your throttle body

Thank you, if you could that would be awsome... I dont see why they would not have vacuum even right at the TB conections, but has vacuum at Intake manifold ones. Is there a switch or is mine just plugged?

Kyle

Did you have a chance to see yet? the lines are on the bottom of the TB.

Kyle

Kyle: The large steel line that is corrogated somewhat runs from the EGR to the bottom side of the intake plennum just back of the throttle body unit. Two small bolts hold it on at a flange. If it is loose or missing it will cause a sporadic and or high idle condition. Fiero Store has replacements and I think Rodney Dickman.

Mike