been going thru my egr and secondary air injection/induction wtf ever. replaced soilnoid for egr and noticed fuse for air pump blowing as soon as i start the car. found an air pump off of a 97 vette installed last night no longer an issue. car ran good no hessitation but 10 miles into the ride today motor got a little warm and then ses light came on then car temp came back to normal.. im thing the whole system is going to be replaced dont really wanna do deletion kit. next i figure im going to tackle the egr valve i can get the driver side nut off but the passenger is not accessible with a socket or wrench.. do i need an off set or and obstrution wrench.. back to my post title i really dont wanna mess with all that so i wanna check the relay for my air pump first with a mutimeter is there anyway to test/ohm the relay before i buy another one... cause its a 30$ relay. also on another note there is a tit for a vacumn line on the line going out of the air pump by the back of the manifold... where does it go. the only schematic ive seen for it is number 26 i believe. help . thanks

 

I can get both bolts standing on drivers side. Try a 1/4 ratchet.

There should be a diagram for the vacuum lines under the hood.


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What year is your car? That will determine what your AIR system plumbing looks like. 94/95 is different than 96/97. Then to complicate things, 95 and up (not the 94) had a recall on the AIR pump, and they added some components that wouldn't be shown on your radiator cover vacuum routing diagram.

Shoebox has diagrams of the AIR recall modifications - see if this helps:

http://shbox.com/1/air_pump_recall.jpg

To help us help you, please add a "Signature" with basic info about your car - year, model, engine, trans and any major modifications.

 

it a 93 z28 whit the lt1 there is a diagram for the lines but does not show this perticual one. best i can figure is that it need a cap and it is used to check pressure? is there any way to test a relay short of buying one

 

yeah i try a 1/4 been tring to use 3/8 with short pass thru socket

 

93.... whole different plumbing system - ignore the diagram I posted (now you see how important adding a SIGNATURE is). The AIR pump on the 93 is the only year bolted to the subframe rather than the engine, and the only year that integrates the EGR and AIR connections.

Unclear where this "tit" is.... is it on the 97 Corvette AIR pump, or on the line that runs from the pump, with a tee for a branch to connect to the driver's side exhaust manifold, then continues on to check valve just before the hard tubing splits to connect to the back of the intake manifold and just above the #8 primary on the passenger side exhaust manifold. Where along that line is the unused connection located?

I'm looking at the diagrams in the 93 factory manual, and I don't see any part labeled "26", and no "tit" for a vacuum line.

 

The non-scientific way of testing your relay is to swap it to the fog lamps relay slot and try the lamps. If they work, the relay is good.

 

the "tit" i am reffering to is a little plastic piece to where it looks like a vacumn line could and maybe should hook up. if you follow the line that goes out of the air pump i weaves thru all the stuff on the motor and comes up by the back of the intake manifold almost in line with the egr solinoid right by the firewall there is a what looks to be factory installed plastic piece that is about 5/32" it looks like a vacumn line goes i will try to find a diagram and post it

 

this guy is having the same problem the call it a valve secondary injection. anyways this is the link for it if you scroll down in the post he has posted the diagram.. as far is i know this is the orginal motor in my car. the part number in question is 25


Vacuum hose diagrams? - LS1LT1 Forum : LT1, LS1, Camaro, Firebird, Trans Am, Engine Tech Forums

 

yes it tee and thats where the problem is on the driver side not on the air pump but its a small line 5/32 or sonot on the manifold

 

Rob - don't you have a picture of the 93 AIR/EGR plumbing on your website? I couldn't find it. My 93 shop manual does not show that part. I wonder if it's used on the Y-Body?

I found this on the web:




The diagram referenced above:

 

This, but it does not show the pump. No 'real life' pics.

 

yeah right before the intake theres a little white tee i can see it , its where the stain is on the concrete right before the intake to the right. i dont believe this is a y body motor set up. all my people assure me this is and lt1. and as far as i know this lt1 gen 2 was only used on the 92 vette prior to be intruduced in the 93 z28. the diagram i found with the part listed is number 25 i found this diagram off of a ls1 forum?

 

All I can say is the diagram with the tee does not agree with what is in the f-body service manual. So, the only thing I can figure is that it from another model. Who has a y-body manual to look it up?

 

I didn't suggest that the engine is not an LT1, nor did I suggest the you have a Y-body engine. What I said is maybe the diagram and your plumbing are from a y-body. I know what year Corvette's had the LT1.

Actually, it was on an LS1/LT1 site.