Well IHave a 86 lg4 car and was wondering what egr vavle I have, I would like to get a new one. Thanks, oh the car is carbed.

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86Z28, GM 350, Jet perf Q-jet & chip Dual snorkel air cleaner, Edelbrock performer intake, Edelbrock headers, Edelbrock cat-back, Off road pipe, MSD 6AL, Accel Super Coil, Moroso Blue max wires, Rapid fire plugs, Jet fan switch, World class t-5, Hurst Short Throw Shifter, Ram Flywheel, Center force dual friction clutch,Aluminum drive shaft, BW disc rear 3.45's & a posi, PBR calipers, Earls braided brake lines, Polygrapite bushings all the way around, poly tranny mount & torque arm mount, Hotchkis lower control arms & panhard rod, Rancho limiter straps, KYB struts & shocks, Gm Wonderbar, Edelbrock strut tower brace, SSM sub frame connectors, Jamex lowering springs, Carbon metallic brake pads, Crossed drilled rotors, Mobil 1 Tranny fluid & motor oil, GM syntheic rear end oil, K&N, Grant stering wheel, 1,200 watt system, Jet Black Paint, 91 Z28 rims, 92 wing, Tinted windows.

 

Look at the part number on the valve.

Should be a "P" or an "N" at the end of the number.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am, flowmaster,FRA,Pro Kit,BMR STB, polished calipers.
1986 Chevy 3/4 ton pick up,flowmasters,4.10s,
1981 corvette FOR SALE
1995 ZX6R,Yosh,D207s

GO #3

 

I can't read the number, If it was replaced Could they put the wrong one on? or do They each hook up diffrent?

 

My experience is that you don't NEED the number (they can go by application) but to make sure it is the right orofice size you should get the number.

Can you wire wheel the valve to beter see the number??

Your GM dealer should be able to match it up pretty good, the number just makes you sure that its the right one.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am, flowmaster,FRA,Pro Kit,BMR STB, polished calipers.
1986 Chevy 3/4 ton pick up,flowmasters,4.10s,
1981 corvette FOR SALE
1995 ZX6R,Yosh,D207s

GO #3

 

Just take it off and take it to auto store to match it up, but take it off carefully so that you can put it back on if needed (Just make sure to vaccum all that carbon out of the port before you put it back on). When I got mine for my 88 Firebird the gave me one that didnt fit. Then they looked up the part # on my original one and they couldnt locate it. Finally we matched one up which was from an 87 Firebird (I dont remember the engine type). So their computer kept giving wrong part #'s. My new EGR valve cost me about $46. The quote I got from GM was for about $60.

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Shouldn't bother putting this but hey what the heck:
1988 Maui Blue Firebird 305 TBI stock

 

do the n and the p's look alike will they interchange, I don't mean will either work I mean will they both bolt up?

 

I belive, in certain applications, they will bolt up.

Don't know for sure...never tried to switch em.
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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

[This message has been edited by Engineboy (edited September 24, 2000).]

[This message has been edited by Engineboy (edited September 24, 2000).]

 

sorry man for all the ? but do they hook up the same mine has to vac lines one run's from the thermo stat housing to the egr and the other to the exaust somewhere I think.

 

I also have a solnoid if that helps.

 

CAn anyone tell me for sure?

 

Yes they hook up the same.

You need to get a vac. diagram if you have any questions about the way it hooks up.

Look at the underhood label or maybe Vader has a diagram for you. (that guy has all the cool pictures )

I don't have one here in front of me.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

[This message has been edited by Engineboy (edited September 29, 2000).]

[This message has been edited by Engineboy (edited September 29, 2000).]

 

The underhood label is gone?

 

IS there any other way to tell?

 

I have one diagram that shows constant vac. to the solenoid on one side, (this could also split to other sensors that need constant vac.),and the vac. line goes to the EGR on the other. The ECM signals when to command the EGR on and the solenoid opens allowing vac. to the valve.

If you need a new valve and the number is gone/missing I would take it to the dealer and match it up.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

[This message has been edited by Engineboy (edited October 04, 2000).]

[This message has been edited by Engineboy (edited October 04, 2000).]

[This message has been edited by Engineboy (edited October 04, 2000).]

 

What happens is I got a new vavle a few years ago, I still get the code 32 even though I put a new vavle in, I never botherd to check the old vavle so I don't really know what it was the new vavle has a n on it, It has a line that goes to the thermostat houseing and another that goes maybe to the exaust?

 

We REALLY need to find you a vac. diagram.......anybody???

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

 

That would be cool.

 

I'll check at work....see what I can find.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

[This message has been edited by Engineboy (edited October 06, 2000).]

 

Did you find anything?

 

I think the manual I need is at the shop next door. I'll go get it tomorrow.

I forgot the other day and remembered today (OOPs, sorry)

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

 

This is what I have for a 86 305.

Vac. comes from port "J" which is the front pass. side vac. port at the base of the carb.This is the port that kinda sticks out at about a 7 o'clock position in the carb base.

Looking at the carb from the front of the car there should be 5 places for vac. hoses , from left to right..

"J" To EGR solenoid
"B" To air cleaner base
"L" To PCV valve/air management valve/EFE TVS
"T" Canister control valve
"M" Canister control valve

From the EGR solenoid it goes to the EGR valve.

Thats all I show. Hope this helps.


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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

[This message has been edited by Engineboy (edited October 10, 2000).]

 

Are they labeled on my carb J B and so on? if not how would I know which is which I would really like to make sure everything is hooked up right, And where should my map sensor go? Thanks a million joe.

 

"Joe"???

The EGR one should be the port on the base plate of the carb that is under the choke pull off. The post sticks out at about a 7 o'clock position looking at the carb from the front.

the map should go to the rear of the carb "N", this should be the only small port back there.

This diagram is actually a 85 diagram, according to this book they are the same.

Hope this helps......Bill

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

 

I think I can help. I asked vader a question about vaccum lines a while back and he posted a diagram. I'll see if I can find it.



Hope this helps

 

Thats the diagram I have, just didn't have a way to post it.



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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3