There is another valve in the general area plumbed into the cruise control. Its right above the brake pedal and needs to be pushed in fully when the brake pedal is up. It also needs to hold vacuum. if it leaks badly, the cruise won't operate. If it leaks somewhat, the cruise surges annoyingly.
 |
-
86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers
Everything looks like voodoo if you don't understand how it works -
yesOriginally posted by gadget73 View Post
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)
Originally posted by gadget73
... and it should all work like magic and unicorns and stuff.
Originally posted by dmccaig
Overhead, some poor bastards are flying in airplanes.Comment
-
Well, confirmed both with the location of the hissing sound when the car was running, then with a vacuum gauge.
The horseshoe shaped valve is the source of the vacuum leak - the actuator that releases the brake does not leak vacuum. Ordered the part from ye local Autozone.1987 Ford LTD Crown Victoria 2-door Coupe - perpetually "sort of" for sale...
Black with Red cloth (velour?) interior.
Purchased on 10/10/2008, with only 70,386 original miles, and only ONE previous owner.
Reader's Ride post, First pic with "new" rims, Other pics with "new" rimsComment
-
That's a tricky little bastard to replace. I believe that if you start the screws in, then cut the slots on the switch open you can just slide it in and tighten the screws down. That makes it much easier.2020 Volvo XC90 T6 Momentum (Ice White / Blonde)
2022 Ram 1500 4x4 5.7 Etorque, Built to Serve Edition, (Granite Crystal / Black)
Past Panthers
1989 Grand Marquis LS (Cabernet/Grey), 1989 Lincoln Town Car SS (White/Blue), 2004 Mercury Grand Marquis Ultimate (White/Black)
Originally posted by Lincolnmania
if its got tits or tires it's bound to give you troubleComment
-
I used my snakedriver to get that damn thing replaced on my 88... but then the servo died so meh. it's plugged now.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)
Originally posted by gadget73
... and it should all work like magic and unicorns and stuff.
Originally posted by dmccaig
Overhead, some poor bastards are flying in airplanes.Comment
-
I didn't realize Autozone would have the vacuum release switch. I ordered mine off Rockauto.com--a good place for random parts. Not gonna lie . . . after getting in a weird ass yoga position under my dash, I didn't have the patience to deal with the r/r, so I gave the switch to my tire shop when they put new whitewalls on, and they changed it out in 5 minutes for free.
Mine went out a couple years ago and I finally figured out it was the reason my cruise quit working. Since there is no suitable replacement for this part that I could find, I plugged the hose on the cruise servo on the engine bay side and have been cruising fine since. I supposed you could plug it on the passenger compartment side, instead, too.Originally posted by gadget73 View PostComment
-
yeah I plugged the one on my Mark VII too. Same reason. I would prefer it be there as an "oh shit" device to make sure the cruise shuts off but its not to be found really.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers
Everything looks like voodoo if you don't understand how it worksComment
-
Yep. But of course in this design, the vacuum purge valve on the brake pedal is redundant since the cruise is also wired to release through the brake light switch.Comment
-
all fine and dandy in theory, except when something gets put in the trunk to short out the brake lights, the fuse pops, and suddenly you're doing 65 heading into a toll booth where you have to stop with the throttle shoving downward the more you push on the brake pedal. BTDT, which is why I would really prefer to have it functional.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers
Everything looks like voodoo if you don't understand how it worksComment
-
"To Find yourself, you must first lose yourself"
-1973 Volkswagen Bus Westy
-1986 Honda Magna 700cc
-1989 Lincoln Town car Signature Series
-2011 Subaru OutbackComment
-
I are serious cat. This are serious business.Originally posted by porschpow View Post
Yes. The Parking Brake Release motor (I call it an actuator) is no longer available. The control valve is.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)
Originally posted by gadget73
... and it should all work like magic and unicorns and stuff.
Originally posted by dmccaig
Overhead, some poor bastards are flying in airplanes.Comment
-
Like the OP, I also hear hissing in the dash, which I was told is the crescent valva which is on top of the steering column"To Find yourself, you must first lose yourself"
-1973 Volkswagen Bus Westy
-1986 Honda Magna 700cc
-1989 Lincoln Town car Signature Series
-2011 Subaru OutbackComment
-
pull the white line out of it and plug that nipple. If the hissing stops, it's not the valve, but the parking brake release. no fixing that, just plug the feed line. Otherwise, replace that valve and have a nice day.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)
Originally posted by gadget73
... and it should all work like magic and unicorns and stuff.
Originally posted by dmccaig
Overhead, some poor bastards are flying in airplanes.Comment
-
Pull the white line out of the valve?"To Find yourself, you must first lose yourself"
-1973 Volkswagen Bus Westy
-1986 Honda Magna 700cc
-1989 Lincoln Town car Signature Series
-2011 Subaru OutbackComment
-
one of the lines to the horseshoe shaped valve should be white... either the line itself, or the ends. That one goes to the vacuum actuator. This process is to test the system to see where the exact leak is.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)
Originally posted by gadget73
... and it should all work like magic and unicorns and stuff.
Originally posted by dmccaig
Overhead, some poor bastards are flying in airplanes.Comment
Comment