stalling(emissions)
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Senior User
Joined: Mar 2003
Posts: 138
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From: enderby
stalling(emissions)
well I hope some one can help with this one I have a 351m in my bronco it's a 1981 my problem is when I put it in drive and give it a shot of gas it almost stalls and it does the same in rev. it has the stock carb on it but I swaped it out with another just like it and the same thing now there is about six or so nips or what ever you call them coming off the thermostat houseing that are not pluged would that be apart of the problem it just seems like there is a manger vacum leak please help anyone
Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
stalling(emissions)
"off the thermostat housing"? Do you mean the vacuum tree in the intake? If they are in the thermostat housing your problem is coolant in the vacuum lines
Other wise, if there are ANY open hose barbs allowing vacuum leaks, it will affect the way the engine idles, runs, performs, etc.. Any of those "nips"/hose barbs are open, you will need to get them plugged somehow.
Other wise, if there are ANY open hose barbs allowing vacuum leaks, it will affect the way the engine idles, runs, performs, etc.. Any of those "nips"/hose barbs are open, you will need to get them plugged somehow.
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
stalling(emissions)
That's a thermal vacuum valve screwed into the thermostat housing, and if there's no line going to it from the carb/intake, then it's NOT a vacuum (or coolant) leak. Look for open vacuum ports on the carb & the intake & plug THOSE - they're the only "leaks". Once you have it sorted out, try to put the vacuum system back the way it goes - use the map on the emissions sticker, or these.
Thread Starter
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Senior User
Joined: Mar 2003
Posts: 138
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From: enderby
stalling(emissions)
can't I just remove this unit and swap it with one that does'nt have all those ports on it. and my carb doesnt have any more vacum lines goin to it. I'm going to have a look at the emission sticker today and see if that will help. but if you guys cone up with anything let me no thanks.
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
stalling(emissions)
You mean change the thermostat housing to one with no port for the TVV? Why? Just ignore it for now. It's not hurting anything. And if you ever decide to make everything work again (which I recommend), it'll be right there waiting for you.
