Found Vacuum leaks!
Thread Starter
Le Mans Master
Joined: Mar 2004
Posts: 7,465
Likes: 1,485
From: Little Rock AR
Found Vacuum leaks!
I have always had a little too much shake in my idle. I assumed it was either the carb or a vacuum leak.
Today I decided to locate the source and found several vacuum leaks. The EGR valve would not hold a vacuum and the AIR diverter valve would not hold a vacuum either. Slipped a couple of small ball bearings in the hoses and those leaks were done away with. One of the other hoses had a crack so I cut the end off and stuck it back on till I can replace it properly. The idle is a LOT better now. I have a few more hoses to check but ran out of time. Keep this in mind if you have original hoses under the hood. Vacuum leaks are a real pain.
Also did some rewiring for the idle stop solenoid which was not getting any power before. Short circuit somewhere near the firewall. Barn job repair zapped with a soldering gun and we were good to go.
Bubba has been a busy all day in my garage.
-Mark.
Today I decided to locate the source and found several vacuum leaks. The EGR valve would not hold a vacuum and the AIR diverter valve would not hold a vacuum either. Slipped a couple of small ball bearings in the hoses and those leaks were done away with. One of the other hoses had a crack so I cut the end off and stuck it back on till I can replace it properly. The idle is a LOT better now. I have a few more hoses to check but ran out of time. Keep this in mind if you have original hoses under the hood. Vacuum leaks are a real pain.
Also did some rewiring for the idle stop solenoid which was not getting any power before. Short circuit somewhere near the firewall. Barn job repair zapped with a soldering gun and we were good to go.
Bubba has been a busy all day in my garage.
-Mark.
Race Director
Joined: Feb 1999
Posts: 19,659
Likes: 34
From: Lenoir City Tennessee
Ci 6, 8 & 10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Good tips. I am sure I have a leak and I think mine is in the headlight relays. Just gotta get around to it.
Racer
Joined: Apr 2001
Posts: 395
Likes: 0
From: Shoreline WA
I mentioned this last week after finding two vacuum hoses that had cracked and split with age. One was going to the vacuum advance on distributor and the other was the short one from the carb to the choke pull-off.
Ran much smoother after fixing both.
Mike
Ran much smoother after fixing both.
Mike
Thread Starter
Le Mans Master
Joined: Mar 2004
Posts: 7,465
Likes: 1,485
From: Little Rock AR
Originally Posted by 30yr Wait
What did you use to check for the leaks? That's on my to do list.
The rear manifold vacuum tap for the accessories was last on the list and I ran out of time but the plan is to disconnect/plug and see if it affects the idle. If it does not affect the idle, all is well. If it does improve, we got more work to do.
-Mark.
