trans vacuum line
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Freshman User
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trans vacuum line
Hey guys I got a 73 f100 240i6. I took it to a shop and asked the guy to tune my Carb and look things over because I'm new to the Carb world. He made a few adjustments and moved a few vacuum lines around. Now when I looked at it my vacuum line from the trans was plugged into my Carb. I know that the vacuum from my Carb and the vacuum from the manifold is different. Should the trans vacuum line go to a Carb port or a manifold port?
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Manifold port. The guy does not know what he's doing. Take the truck back, tell him to return it to its original state, and demand your money back. Who knows what else he screwed up.
Junior User
Joined: May 2009
Posts: 99
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From: Colorado Springs
Unfortunately not many auto techs have any idea what they're doing anymore when it comes to carbs. They are a dying breed. According to wiki ( suspect I know but probably a good ball park ) the last production car motor to have a carb was the GM 307 in 1990 and last truck was the Izuzu in 1993. So quite possibly for some of these young bucks they were born after the last carbureted car was built. If the guy hasn't been in business for himself for at least 30 years I would be hesitant to let him touch it.
Post Fiend
Joined: Mar 2011
Posts: 8,501
Likes: 4
From: Lynchburg, VA
It can be plugged into the carb, so long as it's sourcing manifold vacuum. If you pull the line off and don't detect any vacuum at idle, do as fmc said and demand your money back.
Even some of the older guys don't know what they're doing anymore. There are those of us young guys out there who know what we're doing, though. Just have to look for us 
EFI had long since taken over by the time I was born ('94), but I'd still rather diagnose a drivability problem on a carb'd engine than one with EFI.
Unfortunately not many auto techs have any idea what they're doing anymore when it comes to carbs. They are a dying breed. According to wiki ( suspect I know but probably a good ball park ) the last production car motor to have a carb was the GM 307 in 1990 and last truck was the Izuzu in 1993. So quite possibly for some of these young bucks they were born after the last carbureted car was built. If the guy hasn't been in business for himself for at least 30 years I would be hesitant to let him touch it.
EFI had long since taken over by the time I was born ('94), but I'd still rather diagnose a drivability problem on a carb'd engine than one with EFI.
Junior User
Joined: May 2009
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From: Colorado Springs
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
That's a good point - the Carter may have a manifold port toward the bottom. Check as devino says.
Post Fiend
Joined: Apr 2008
Posts: 8,261
Likes: 15
From: Big Sky Country
Mistake number one....most shops these days haven't a clue about carb'd motors...
You're better off diagnosing/rebuilding it yourself.
You're better off diagnosing/rebuilding it yourself.
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Freshman User
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Yea I understand exactly what y'all mean. Most shops around here wont even look at my truck. But this guy has been in the same shop since the 50s and has built a ton of 50,60,& 70 model fords. That being said he is also pretty old and his son helps most of the time so it may been his son who knows but he only charged me 20 bucks.
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Freshman User
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There is a port at the bottom with no vac at idle. But on the side just underneath the Carb I have a 2 ports going into a block and it has vac all the time
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Freshman User
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Awesome ill switch it around. What made me look at it is sometimes when it shifts from first to second it will shift extremely slow almost like a slip. Not all the time mainly if I'm just barley on the throttle like rolling through parking lot
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