73-87 Chevy _ GMC Trucks > Fuel Systems and Drivability
New to the mysteries of the Quadrajet
Dave Kay:
First off I'd like to say that as a newly registered member on this site I've found an incredible amount of info here and it's Heaven sent... a sincere thanks to all for that. My current project (read that headache) is a 1986 GMC C3500 w/5.7 ltr "M" engine and a TH400. Bought it on a lien-auction for practically nothing but as things have progressed I've found more and more wierd problemms that cause money to go out of my bank account. I live in southern California where I'm attempting to get this truck smog-legal. However, it's turned out to be more work than I thought because the previous owner was a total hack.
The Big Mystery for me is with the Quadrajet carb/choke; on mine there doesn't seem to be one. Strange as this may sound, I honestly must ask what is probably the dumbest/newbie question there could possibly be; where is the choke supposed to be mounted? I'm talking about an automatic choke. On the carb body or the intake? The carb-guys I've gone to for over 10 yrs looked at my Quardajet that I pulled for them to rebuild and when I asked where's the choke (there wasn't one on the carb body) they replied it must be on the intake manifold. Ok I said and mentioned that there also looks to be some linkage that's missing too... can you guys scare that up? However, when I got back home later that day I looked and sure enough, there wasn't anything resembling a choke on the intake at all. Wondered if maybe a choke could be some kind of vacuum actuated thing... anyway, upon further review I see no choke assembly on the intake and no open holes where it might be mounted, nor is there a choke housing assembly on the actual carb itself... a mystery. Is the carb wrong or the intake? Or...?
Hopefully some kindered soul will take pity on me for my ignorance... and (gulp) help?
DK
Blazin:
Well I will give you a welcome from the other side of the country, New Hampshaa!
I am just a lowly body man so I can't answer your carb question. Carb. and vehicle electrical are my low points. I can wire a house but not a car, go figure!
VileZambonie:
So I gathered you need a carburetor with a choke? Other than that I got lost reading your post... lol
You can buy a reman Q-jet electric choke for around $250 bucks from Autozone.
Dave Kay:
Thanks Mr VileZambonie and pardon my rambling... (YEEESH!) Revised the post this morn to make it understandable... too much Tacate beer does strange things to the brain in the middle of the night...
And so I can't figure out what I have here: a wrong intake manifold or a wrong carb? That's the mystery. Not sure I want to go the Autozone route justt yet because from what i can see under the hood there doesn't look like an electrical connection for a choke either... another point here is I'm pulling the intake because it's been determined there's a leak at the head and so wondering if it might be easier to just locate another intake w/choke mounting hole... anyone know how the intake numbers affect model year, etc.,?
VileZambonie:
Wiring up an electric choke is a piece of cake.
Take a pic of the passenger side of the carb and the intake and post it here. We'll tell you what you have.
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