Headlight Woes
Thread Starter
Pro
Joined: Aug 2006
Posts: 649
Likes: 8
From: COOKEVILLE TN
Headlight Woes
I just replaced everything but the Headlight Switch & Override Switch. Still takes a long time to open, they close very quick. I can pinch the vacuum hose and let go, and they start opening. Any Ideas ?
Thanx
Thanx
Drifting
Joined: Jun 2012
Posts: 1,990
Likes: 183
From: Port St. Lucie Fl
if pinching a hose closed makes them open faster sounds to me like there is a vacuum leak somewhere that hose is connected to.
Melting Slicks
Joined: May 2015
Posts: 2,365
Likes: 428
From: Cape Girardeau Missouri
Did you test ALL of the new parts to ensure they hold vacuum? An amazing number of new vacuum system parts arrive with significant leaks. Did you replace the hoses? If so did they come from one of the vendors or perhaps Doc Rebuild? I found that hoses available from typical parts stores do not seal well. If you did not replace the hoses and even if you tested them for leaks you cannot assume that they are not stretched out and leaking at the ends.
Instructor
Joined: May 2015
Posts: 133
Likes: 12
From: Maple Valley WA
Did you test ALL of the new parts to ensure they hold vacuum? An amazing number of new vacuum system parts arrive with significant leaks. Did you replace the hoses? If so did they come from one of the vendors or perhaps Doc Rebuild? I found that hoses available from typical parts stores do not seal well. If you did not replace the hoses and even if you tested them for leaks you cannot assume that they are not stretched out and leaking at the ends.
Thread Starter
Pro
Joined: Aug 2006
Posts: 649
Likes: 8
From: COOKEVILLE TN
Did you test ALL of the new parts to ensure they hold vacuum? An amazing number of new vacuum system parts arrive with significant leaks. Did you replace the hoses? If so did they come from one of the vendors or perhaps Doc Rebuild? I found that hoses available from typical parts stores do not seal well. If you did not replace the hoses and even if you tested them for leaks you cannot assume that they are not stretched out and leaking at the ends.
Instructor
Joined: May 2015
Posts: 133
Likes: 12
From: Maple Valley WA
Melting Slicks
Joined: May 2015
Posts: 2,365
Likes: 428
From: Cape Girardeau Missouri
Think of all of the rest of the vacuum hoses in the car--especially all of those "emissions" hoses... Consider replacing them all! I did just that in my '79 and the improvements in idling, running, starting, economy, and even comfort (the engine was much quieter at highway cruising speed) were astounding.
If you decide to replace the hoses don't forget the fuel EVAP system (good time to replace the charcoal and filter in the canister as well). If you have an automatic don't forget the small section of hose at the transmission feeding the modulator valve. Doc Rebuild sells great hose kits with excellent hook-up diagrams.
