Thread: EGR bleed solenoid

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EGR bleed solenoid
I believe thats what its called, its on the back of my intake on my 84 burb w/a 350 w/700R4 tranny. It has 2 vaccum hoses going to it w/an electric plug. I need to know if I can run w/it disconnected w/o having any problems, (like does it have something to do w/my tranny ??? ~~~> see orange section 2nd paragraph http://www.gsdi.org:8088/Tech/700R4/lockup.htm

quote:
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When I removed the EGR bleed solenoid and related wiring, I had to rewire my 700R4.
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and if I CAN'T what has to be done so I make it work correctly. Because at this time I have to run my spare NON-EGR motor in my truck until I get mine rebuilt and I DON'T want to change my intakes. Its a cost & time factor, "aint got no extra $$$$$$$ to do it & I needed my Burb YESTERDAY ........thanks.......joe

long story short version, son used truck, came home I took off in it, got one block from home then seen white smoke coming out of exhaust. tore it down found 2 blown head gaskets and oilly plugs, so its time for a rebuild after 200,000 plus, hard/abusive miles

TooMany, the wiring on my '81 Camaro has that same EGR bleed solenoid. I think the purpose of it is to bleed off some of the vacuum going to the EGR valve when the torque converter is locked. I have the schematics for the Camaro at home, I would imagine that it would be a similar control circuit on the '84. I think it's the same signal from the computer that drives the EGR bleed and the lockup, but I'll have to look at the schematics to be sure.

Short answer is I know it can be done, but I'm not exactly sure how until I look at the schematics. I'll check tonight and let you know...

John

TooMany,

You say you want to use a non-EGR engine for the time being? Are you still going to use the computer controlled distributor and carburetor? Still using the computer? I think the problem the other guy had was that maybe he was removing the computer controls from the vehicle. If you do not use the computer and the computer controlled carb and distributor, you will DEFINITELY have to rewire the 700r4. If you still use all the computer controlled components and just want to disconnect the EGR for now, I think you'll probably be fine as long as you leave all the wiring in place. Unfortunately, for one reason or another, I haven't had a chance to check my schematics yet.

my truck is a NON-computorized burb, no computor, no computer controlled carb and just a regular old HEI dist.


ok folks here's more info on what I got on it. the wiring I'm talking about goes to the EGR bleed soleniod, on that switch there's 2 vacuum lines and 2 wires. one is YELLOW w/the the letter B on one side and the letters PED on the other and this wire goes to the tranny. the other wire is kinda light BLUE w/the letter A on one side and the number 13 on the other side and it runs inside & goes to a switch on the brake pedal.... Now that we know that, what the hell do these switches do?????????/ is it the lock up for the tranny or what & if it is do I need to put a toggle switch in between the YELLOW wire & the BLUE wire to make the convertor lock up???? or is there a way to wire it up so it'll do it by its self........ just so we all under stand also the only reason I want to do this is cause I dont want to take the intake off of my spare motor because its all set up for what I was going to use it for (my 48burb), and being that $$$$$$ is tight right now (had to put a cam sensor, cam sensor pick-up and a timing gear & chain in the wifes 92 park ave) I'd rather save all the cash I can so it will go into the rebuild of the stock motor.......thanks for everything.........joe

Joe, not sure what that can be if you don't have a computer... Sounds like it might be a thermal vacuum switch, but not sure... Where do the vacuum lines go? Also, where on the transmission does the one wire go? Should be 4 terminals on the transmission plug, are there any other wires?

That switch may be some kind of coolant temperature switch to prevent the torque converter from locking up until the engine gets hot enough... Hard to tell though. Is it installed into one of the water passages in the intake?

Is it the original engine in your truck? If so, it might be worthwhile to go to the library and see if they have the GM service manual for your truck. Might take some time to find out what that switch really does, but it might be better than guessing...

Sorry I'm not more helpful...

John

thanks john BUT I was able to earn some $$$$ from working on a friends brakes & decided to break down & just replace the intake w/the stock one, along w/all the vacuum sensers that screw into the intake. I didnt want to waste the cash but a guys gotta do what a guys gotta do and its a b!tch when ya only got 2 cars and one is down like this & what made it worse was when the wifes car went down 2 days after my truck decided to take a vacation. but it'll be up & running soon, right now I'm changing & painting everything CHEVY ORANGE that should be that color so it all matches the color of the block.......thanks again...joe