Cruises Control Quit ??
Burning Brakes
Joined: Oct 2002
Posts: 983
Likes: 1
From: Bergen County NJ
Re: Cruises Control Quit ?? (JWG)
Check the fuse before you spend time anywhere else. After that, there's a vacuum fitting under the fuel injector cover (can't remember which side) that eventually cracks & fails. Inspect the rest of the vacuum connections to the CC system also.
The other components that could fail are:
CC servo - near the battery
CC module - buried in the passenger side dash
switch - brake/clutch pedal assy
switch - turn signal stalk
Mine's out too and I've been banging my head :banghead: trying to get it going again.
Good luck with yours
[Modified by sraft, 7:23 PM 2/16/2003]
The other components that could fail are:
CC servo - near the battery
CC module - buried in the passenger side dash
switch - brake/clutch pedal assy
switch - turn signal stalk
Mine's out too and I've been banging my head :banghead: trying to get it going again.
Good luck with yours
[Modified by sraft, 7:23 PM 2/16/2003]
Joined: May 2002
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From: Punta Gorda, FL
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'13- '14
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Re: Cruises Control Quit ?? (sraft)
There is a vacuum hose, under the passenger side fuel rail. Check there first. Thats where my problem was. I simply reconnected the hose, and boom, I had my cruise back! (not that I ever use it, but I hate knowing something isnt working)
Melting Slicks
Joined: Apr 2002
Posts: 3,268
Likes: 2
From: Minnesota in the summer, Las Vegas in the winter
Re: Cruises Control Quit ?? (JWG)
On my 91 I would start at the vaccuum ball in the front driver's side corner. Sometimes the vaccuum hose gets pulled off that connection. Then, make sure the cable is not loose from the holder under the ecm (I think). If I remember correctly there is a cable mount under there. Just follow the cable from the diaphragm. To check the diaphragm, take off the hose and blow on the connection; the diaphragm should move back and forth. If you need to remove the diaphragm, I think only two or three screws hold it on. I am betting it is either a fuse or a vaccuum connection. If the motor was recently worked on, perhaps someone accidentally removed a vaccuum hose. Good Luck! :thumbs:
Thread Starter
Race Director
Joined: Dec 2002
Posts: 11,573
Likes: 10
From: Louisiana
St. Jude Donor '07
Re: Cruises Control Quit ?? (brdd)
Thanks for the info, at least now I have a place to start. I did detail the engine recently; maybe I accidentally pulled something loose. Thanks again.
:D
:D
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From: Chino Valley AZ
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Re: Cruises Control Quit ?? (JWG)
Plastic vacuum tee under passenger fuel rail cover
One of the most commonly overlooked, yet easily recognized vacuum leak occurs with a plastic vacuum “T” under the LT1 passenger side fuel rail cover. Located about mid-way between the front and back, and situated very closely to the top of the intake manifold, the “T” is the main vacuum source for the HVAC and Cruise control. Due to its location, this fitting is subjected to enormous heat and has been known to deteriorate on a routine basis..
Visual inspection often doesn’t reveal that the vacuum “T” has failed. The vacuum “T” tends to slowly deteriorate over a period of time. The best method for inspection is to actually turn the “T” over and look at the underside. What you find may shock you. Due to heat, the “T” fitting actually decomposes on the side toward the intake manifold and develops large holes similar to Swiss Cheese. Replacement is cheap and easy.
GM calls that vacuum “T” a “valve”. The GM part # is 14056648. You can pick one
up from your friendly Chevrolet parts man for cost + 10% + tax = ~ $3.00.
If you don’t have easy access to a dealership, you can call Jeff Kopp at 1-800-728-8267. Jeff can help you get the part.
~ Purp :thumbs:
[Modified by PurpleC4, 7:00 PM 2/16/2003]
One of the most commonly overlooked, yet easily recognized vacuum leak occurs with a plastic vacuum “T” under the LT1 passenger side fuel rail cover. Located about mid-way between the front and back, and situated very closely to the top of the intake manifold, the “T” is the main vacuum source for the HVAC and Cruise control. Due to its location, this fitting is subjected to enormous heat and has been known to deteriorate on a routine basis..
Visual inspection often doesn’t reveal that the vacuum “T” has failed. The vacuum “T” tends to slowly deteriorate over a period of time. The best method for inspection is to actually turn the “T” over and look at the underside. What you find may shock you. Due to heat, the “T” fitting actually decomposes on the side toward the intake manifold and develops large holes similar to Swiss Cheese. Replacement is cheap and easy.
GM calls that vacuum “T” a “valve”. The GM part # is 14056648. You can pick one
up from your friendly Chevrolet parts man for cost + 10% + tax = ~ $3.00.
If you don’t have easy access to a dealership, you can call Jeff Kopp at 1-800-728-8267. Jeff can help you get the part.
~ Purp :thumbs:
[Modified by PurpleC4, 7:00 PM 2/16/2003]
