1979 pontiac grtand prix

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genestang

Apprentice
Sep 18, 2021
82
18
was wondering if anyone had a engine vacuum diagram for 3.8 79 Grand Prix. car runs but I am seeing things that the previous owner or owners have unhooked
car burns very rich and will almost burn your eyes while it is running. Vac lines seem to be attached but not sure if they are attached to the proper points on the car.
to get it running when cold is quite a chore but runs ok when you finally are able to get it running. lags with congestion when you push the gas pedal while at idle almost as if it could cut out at any given point. a vac diagram and changing out those old hoses may just help out with this issue. has a ported vac switch not even hooked up at all. No lines going to it as well.
 

79 GP 4 speed

Master Mechanic
Nov 12, 2017
420
63
I have a factory service manual and I can copy the page's and mail them to you if you would like. Send me a pm with your address and I'll try to get them sent out tomorrow.
 
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genestang

Apprentice
Thread starter
Sep 18, 2021
82
18
That would be great and I thank you very much. I have to pick up some type of manual for it, we just purchased it and I am slowly working on getting it road worthy again will get info needed to send over to you as soon as I can
 

79 GP 4 speed

Master Mechanic
Nov 12, 2017
420
63
Sounds good, if you have a question or looking for a part let me know and I'll see if I can help. Owned 78-80 gp's for 30 years.
 

genestang

Apprentice
Thread starter
Sep 18, 2021
82
18
Sounds good, if you have a question or looking for a part let me know and I'll see if I can help. Owned 78-80 gp's for 30 years.
Awesome thank you so much. I will keep that in mind so far it has all its parts
 
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79 GP 4 speed

Master Mechanic
Nov 12, 2017
420
63
Start a new thread to introduce yourself and include pics of your car. People on here are friendly and helpful but they love pictures.
 

genestang

Apprentice
Thread starter
Sep 18, 2021
82
18
Start a new thread to introduce yourself and include pics of your car. People on here are friendly and helpful but they love pictures.
I have introduced myself when I joined up with the forum. I need to take some pics of Edna but we haven’t gotten that far just yet. Will try to post some soon. Not much to look at but the green and tan kind of grew on me.
 
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