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26 replies to this topic

#1 Rlmcowboy

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Posted 18 May 2013 - 01:36 PM

Got some vacuum leaks around the part with the green tape can anyone tell me what it is and if I should go ahead and replace it when I do the lines

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#2 Dinky26

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Posted 18 May 2013 - 10:31 PM

What year and model are you working on?

#3 Turbone

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Posted 18 May 2013 - 11:29 PM

Purge solenoid 



#4 Rlmcowboy

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Posted 19 May 2013 - 08:56 AM

1986 gl

#5 Lacyjs9

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Posted 19 May 2013 - 09:36 AM

its smog related vacuum crap you cant find em any where



#6 Lacyjs9

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Posted 19 May 2013 - 10:28 AM

what kind of problem are you having?



#7 Rlmcowboy

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Posted 20 May 2013 - 09:51 AM

Vacuum leak. I replaced the hoses that run to that part. The car ran I little better but not great. I sprayed it with starting fluid and it ran smooth. I'm still trying to find out what that part is

#8 mikaleda

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Posted 20 May 2013 - 10:01 AM

Like turbone said its the purge control cylinoid. To find a vaccume leak I use carb choke cleaner, on a cold engine only, spray along vaccume hoses and connections, EGR ect. When you spray where the leak is the engine will bog down.

Edited by mikaleda, 20 May 2013 - 10:08 AM.


#9 Lacyjs9

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Posted 20 May 2013 - 10:10 AM

where are you spraying lighter fluid?



#10 Rlmcowboy

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Posted 21 May 2013 - 02:45 PM

Is there away to take off all the emission bull crap and not have any problems??

#11 Lacyjs9

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Posted 21 May 2013 - 04:07 PM

just cap off the hoses you take off i have been goin through the same crap im just replaceing the carb might be your problem too give me more insight on what exactly is happenng



#12 Rlmcowboy

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Posted 21 May 2013 - 04:28 PM

Ok here's whole story... Just bought 1986 gl wagon w/1.8 l carb. Engine. The guy said it had a vacuum leak around the part that is in the pic I posted earlier. So I replaced the lines goin to that part.which the dealership is calling a vacuum switch valve that's pretty much non existent. I removed it to see if there were any cracks or anything will the part was on the bench it was destroyed by my son when I wasn't looking. So now I'm totally with out the part unless I spend a lot of money which I'd rather not do.

#13 Rlmcowboy

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Posted 21 May 2013 - 04:37 PM

4 vacuum lines go to that part
1- to the breather
2-front of carb
3- back of carb
4- to a metal below it that goes into the engine I believe. Hard to see lots in the way

#14 Lacyjs9

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Posted 21 May 2013 - 05:03 PM

a piece of mine is broken just cap the hoses that go to it its meaning less. how many miles it got on it carb ever been rebuilt?



#15 Rlmcowboy

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Posted 21 May 2013 - 05:13 PM

60k original miles. I doubt the carbs been touched. The car idles rough/stalls and the egr light is on. Was going to replace egr valve if fixing the vacuum problem didn't make light go out. Can I remove the egr valve all together and plate the hole.oh and the catylitic converter looks to be rusted all to hell also

#16 Rlmcowboy

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Posted 21 May 2013 - 05:14 PM

60k original miles. I doubt the carbs been touched. The car idles rough/stalls and the egr light is on. Was going to replace egr valve if fixing the vacuum problem didn't make light go out. Can I remove the egr valve all together and plate the hole.oh and the catylitic converter looks to be rusted all to hell also

#17 Lacyjs9

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Posted 21 May 2013 - 05:17 PM

my egr valve light is on its also plated runs fine cap those hoses off and check the pcv clean it with brake cleaner or carb cleaner and reinstall make sure air goes in one way but no the other another thing to check would be the timing 



#18 Rlmcowboy

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Posted 21 May 2013 - 05:26 PM

I've already put new pcv valve in. 1st thing I noticed was oil blowback in the breather. Ill cap the lines remover and plate the egr valve and see what happens thanks for the info. Ill keep y'all posted

#19 Gloyale

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Posted 21 May 2013 - 05:39 PM

Vacuum leak. I replaced the hoses that run to that part. The car ran I little better but not great. I sprayed it with starting fluid and it ran smooth. I'm still trying to find out what that part is

 

Did you retrieve the orrifice plugs from the old hoses?

 

If not, you have way too much air running into the air bleeds for hte emulsion tubes.



#20 Gloyale

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Posted 21 May 2013 - 05:43 PM

my egr valve light is on its also plated runs fine cap those hoses off and check the pcv clean it with brake cleaner or carb cleaner and reinstall make sure air goes in one way but no the other another thing to check would be the timing 

 

EGR light needs to be reset.  2 Blue, 1 green connectors behind fusebox.  Disconnect whichever are hooked toghether, then reconnect to the other one.  or just pull the bulb.  It's just telling you  "it's been 60k miles......clean the EGR"  It'll come back again in another 60k

 

Don't plate off the EGR.  But DO plug the large line that comes out of it and runs over to the Anti backfire valve.  That vavle goes bad and makes a huge Vacuum leak.

 

With only 60k, If you had left all the hoses alone, and just drained the carb bowl and blow out the emulsions and it would run fine.

 

These carbs get gummed and clogged up....clean them out, and it makes a huge difference.


Edited by Gloyale, 21 May 2013 - 05:50 PM.


#21 Lacyjs9

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Posted 21 May 2013 - 06:25 PM

whats the differences in plating and capping alot of people on here plate there egr valve 



#22 Natfro

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Posted 23 May 2013 - 06:42 PM

Just want to thank Gloyale on behalf of my husband Rlmcowboy. He did exactly what you said and the car is up and running (smoother than when we bought it). One thing at a time. This car is worth it. Great shape, low miles, and on top of that his dream car. So thanks to all!

#23 Rlmcowboy

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Posted 23 May 2013 - 08:54 PM

Thanks to all for the help. Capped the vacuum lines.i left the egr valve in but capped the lines. The line from the egr to the anti back fire valve was dang near clogged 100%. Sprayed some carb cleaner in it and its much improved. Carb still need some attention will get to that soon enough.

#24 ivans imports

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Posted 24 May 2013 - 09:13 AM

float bowl vent transducer takes the preshure vapors of the top of float bowl and turns them back to gas and retuns it to intake prvents float bowl over preshure. As far as your vacume leak check antibackfire valve plubing this messes up lots on those years 



#25 Gloyale

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Posted 24 May 2013 - 12:44 PM

float bowl vent transducer takes the preshure vapors of the top of float bowl and turns them back to gas and retuns it to intake prvents float bowl over preshure. As far as your vacume leak check antibackfire valve plubing this messes up lots on those years 

 

Nope....this is the air suction valve he's talking about.

 

Bowl vent transducer is on the other side of the intake.  It only has 2 ports...and often get's broken in the removal/reinstall of the spare tire.






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