The Ford Barn

MurphyJ · 12-18-2012, 10:22 PM

I just dicovered, after 2 years of driving that there is a break in the vacuum line running from the intake manifold up to the wiper "motor". It is broken up above the windshild frame, difficult to see. Don't drive it on rainly days.
Question: Has this "open" vacuum line caused any engine damage or performance issues? I intend to plug the port on the intake manifold immediately.
Thanks guys/girls again for your input, wisdom and advice.

Tom Wesenberg · 12-18-2012, 11:17 PM

Your idle would be leaned a bit, but it wouldn't cause any engine damage. It must not have been leaned enough to notice, or you'd have noticed it a long time ago, so I wouldn't worry about it other than to fix it or plug the intake port.

40 Deluxe · 12-18-2012, 11:22 PM

As far as performance issues go, you will find out as soon as you drive it after plugging the vacuum port.
As far as engine damage goes, you have no doubt set the carb idle mixture recently so would have compensated for the vacuum leak at idle. If you are a typical 'A' guy, you adjust the gas/air valve as you drive to get the best performance/economy. So you would be compensating for the vacuum leak at higher speeds, too. Most likely no harm has been done. A compression check wiill set your mind at ease.

BILL WILLIAMSON · 12-19-2012, 12:37 AM

Isn't it just a hose across the top of the winshield??? Bill W.

MurphyJ · 12-19-2012, 11:09 AM

Sponsored Links (Register now to hide all advertisements)

Thanks fellas for your quick replies. you are always so helpful.
You are correct Bill, it is a rubber hose.

12-18-2012, 10:22 PM	#1
MurphyJ Senior Member Join Date: Feb 2011 Posts: 153	Vacuum line break question I just dicovered, after 2 years of driving that there is a break in the vacuum line running from the intake manifold up to the wiper "motor". It is broken up above the windshild frame, difficult to see. Don't drive it on rainly days. Question: Has this "open" vacuum line caused any engine damage or performance issues? I intend to plug the port on the intake manifold immediately. Thanks guys/girls again for your input, wisdom and advice.

12-18-2012, 11:17 PM	#2
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Vacuum line break question Your idle would be leaned a bit, but it wouldn't cause any engine damage. It must not have been leaned enough to notice, or you'd have noticed it a long time ago, so I wouldn't worry about it other than to fix it or plug the intake port.

12-18-2012, 11:22 PM	#3
40 Deluxe Senior Member Join Date: May 2010 Location: now Kuna, Idaho Posts: 3,779	Re: Vacuum line break question As far as performance issues go, you will find out as soon as you drive it after plugging the vacuum port. As far as engine damage goes, you have no doubt set the carb idle mixture recently so would have compensated for the vacuum leak at idle. If you are a typical 'A' guy, you adjust the gas/air valve as you drive to get the best performance/economy. So you would be compensating for the vacuum leak at higher speeds, too. Most likely no harm has been done. A compression check wiill set your mind at ease.

12-19-2012, 12:37 AM	#4
BILL WILLIAMSON Senior Member Join Date: Dec 2010 Location: FRESNO, CA Posts: 12,560	Re: Vacuum line break question Isn't it just a hose across the top of the winshield??? Bill W. __________________ "THE ASSISTANT GURU OF STUFF"

12-19-2012, 11:09 AM	#5
MurphyJ Senior Member Join Date: Feb 2011 Posts: 153	Re: Vacuum line break question Sponsored Links (Register now to hide all advertisements) Thanks fellas for your quick replies. you are always so helpful. You are correct Bill, it is a rubber hose.