Ok guys, 84 T/A with a new Edelbrock carb (previous owner installed about two months ago). I think the electric choke is totally unhooked.

When I turn the key off, the car keeps running for a good 4 seconds until it finally sputters out. Is this the choke, timing? or what?

any help would be good! I don't know too much about carbs.

 

check all your vaccuum lines and fittings, you most likely have a vaccuum leak.

Eric

 

Shoot, I was hoping you wouldn't say that. I've had horrible experiences with those darned vacuum lines! I'll inspect them, and report back tomorrow!

 

i had the same problem with my 305, it also had a terrible acceleration problem. i got the timing set and it never happend again, and the acceleration was great for a 305

 

Ok, I found a vacuum leak, by the brake booster. It's just sitting there unhooked, covered it with my finger and damn did it suck! So, where does it go? It looks like it might go to a little reservoir of brake fluid next-to-almost-behind the master cylinder? but i don't see any connection for it...maybe it's broken off?

 

Could be a few things. Vac leak. Improperly set carb. And or the timing is out. Check first for any Vacum leaks...if you have a propane torch around just open it up a little and move it around the base gasket from the carb, and all other area that can affect the air going into the intake...if the idle climbs you've found you leak. If not that, then double check the timeing, if all else fails you may need to get the carb setup again. HTH

Keiran

 

Ok, here's a picture of where I'm talking about. You see the master cylinder right, the little white cylindrical thing to the right of it, that's right about where the vacuum line is just sitting. I'll try and take a closer picture tomorrow in the day.

 

Does it go to the Brake booster itself??? Or is it a small hose?? Do you have a cam to get pics???

 

Your car is a Stick I take it??? That is your clutch fluid resevoir to the right of the booster.

 

i'll take a closer pic right now, see how it turns out with the flash in the dark.

 

yes, stick.........ohhhh, i thought it was part of the brakes?

Hmmm, well, i'll take the pic anyway

 

Ok, here's the pic. you can see the hose, that's the vacuum line that's not hooked up. the master cylinder is right behind it, and it's right next to the clutch cylinder?

Anyway, where's that thing supposed to be hooked up?

 

It looks like it goes to the clutch resevoir, check around that area for any other fittings or loose hoses. Is the cap on that resevoir craked open or is it just the pic.. If it is cracked I would get that replaced immediately. Try to follow it to see where it goes..I am not 100% familiar with "stick" F bodys so...but something around there isn't hooked up. It can't be to far from where the hose is..so it is around that area somewhere realy close.

 

Kaz, you've got a very keen eye! I noticed that myself when I took the pic, looks like I've got another thing to do next to finding this damn vacuum hook up.

Question: Is there supposed to be a vacuum line hooked up to this clutch cylinder? I ask because right where the cirlce is in this pic, it looks like the hose is supposed to go there, but the connector kinda looks broken. Let me know if it goes there, so I can get a new one and hook that bad boy up!

 

I do beleive that a hose does go on their I will check with my Mitchell program and see what I find. Where it looks to be broken is ther a hole going through the resevoir??? If so that is most likely wher it goes. You don't want any dirt getting in their at all..so....give me a few minutes and I'll see what I find.

 

I unscrewed the cap, and there's a little piece if plastic shaped like a cup that sits in the cylinder and keeps the fluid at the bottom. The cup hugs the sides of the cylinder so I don't any dirt could get in there anyway. There is no hole going thru the reservoir, but where I circled it in the previous pic, theres a little piece that portrudes out that looks like something does go there.

Thanks for your help Kaz, it's greatly appreciated.

 

No thanks needed..Glad to be of help. I check my program with no results. I do know however there is a Vac sensor somewhere close in that area that has a hose going to it. Check here where I have circled and also underneath to see if you find anything..

 

Underneath there is a hose, but i'm guessing that goes to the clutch. Ok, so I am going to assume that the vacuum hose does attach to the clutch cylinder. I will get a new one, and install, and see if anything is helped by this. Thanks again Kaz.

 

You are very welcome...Glad to have been of some help. Let me know how you make out...You can probably get the resevoir from a wreckers...when taking it off take a good look at everything around it...Maybe it will give you a clue.

Keiran

 

I just found that the fluid reservoir does NOT have a vacum hose to it so I would just replace the cap unless you see any other signs of damage. Do you know if your car came original with a stick or could it have been a auto??? If it was a automatic there are some vac lines around that are not used with a manual car..you may just need to plug the hose off with a screw or remove it completely...I know plugging it off sound like a backyard mechanic thing to do but if it is not needed and you don't want to pulll it all out...Find out if the tranny is original, well if it came with a stick originally and we'll go from there.

 

Yeah, it's originally a stick.

 

OK we'll drop that idea. I'll have to look into it somemore....

 

Ill try and cap it off tomorrow and see if that helps the car run a little better. Thanks!

 

Why cant you just follow the line and figure out where its coming from? I can't think of any other vacuum line with hose that big except the pvc valve but that line seems a little out of place to be that. Capping it off would solve the problem BUT there is obviously a purpose for it so you'll solve one problem and cause another.

 

hey man, I've got an 86 Silverado that is almost identical(mines automatic). Ya I had same problem with it deiseling after shutoff. I fixxed that by taking off the idel advance and letting it idel real low.

LOL that looks just like the inside of my truck only you can fit 6-7 folks under my hood.

 

Finally fixed the dieseling problem! Timed it, it was running at 40*! Now it's good to go, and she shuts off without hesitation! I'm so glad, cause that was pretty embarassing!