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09-27-2008, 02:39 PM
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#1 |
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what knocking sound?
 
Join Date: Feb 2005
Location: good ol North Dakota
Posts: 148
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cruise control
Hi guys. My 78 blazer has c\c, but its not working right. Sitting in the garage, it wil work (most of the time), but get it out on the highway it won't. So I guess my question is does it need to be taken apart and cleaned or is it something else. Thanks.
Kager
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1968 C-10 1953 belair two-door post 1955 chevy 3600 big window 1950 studebaker starlite coupe 1968 Impala SS |
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09-27-2008, 03:59 PM
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#2 |
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In the Forgotten far North.
Join Date: Jul 2007
Location: Anchorage, Alaska
Posts: 2,627
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Re: cruise control
hOW ARE YOU ABLE TO CHECK IT IN THE GARAGE?
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1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015 1990 chevy suburban V2500 5.7L My cluster Mods-Nov 2007 overhead console Stereo install Round 2 Aug 2009 Heated/turn signal mirror upgrade |
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09-28-2008, 01:29 AM
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#3 |
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what knocking sound?
Join Date: Feb 2005
Location: good ol North Dakota
Posts: 148
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Re: cruise control
Engine idling and in park, and press the cruise button. The engine starts accelerating until I hit the brake. I thought that was a bit strange myself, but it did it multiple times.
 Kager
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1968 C-10 1953 belair two-door post 1955 chevy 3600 big window 1950 studebaker starlite coupe 1968 Impala SS |
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09-28-2008, 01:41 AM
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#4 |
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In the Forgotten far North.
Join Date: Jul 2007
Location: Anchorage, Alaska
Posts: 2,627
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Re: cruise control
Sounds like the control module is messed up. Thats the unit mounted to the fender well and you speedo cables hook into it. Your c/c shouldn't actuate unless your at a minimun of 25-30 mph. and never in park or at an idle
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1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015 1990 chevy suburban V2500 5.7L My cluster Mods-Nov 2007 overhead console Stereo install Round 2 Aug 2009 Heated/turn signal mirror upgrade |
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09-28-2008, 02:26 AM
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#5 |
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what knocking sound?
Join Date: Feb 2005
Location: good ol North Dakota
Posts: 148
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Re: cruise control
Would it more likely be a mechanical problem or electrical? Thanks
kager
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1968 C-10 1953 belair two-door post 1955 chevy 3600 big window 1950 studebaker starlite coupe 1968 Impala SS |
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09-28-2008, 07:58 AM
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#6 |
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In the Forgotten far North.
Join Date: Jul 2007
Location: Anchorage, Alaska
Posts: 2,627
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Re: cruise control
Electrical
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1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015 1990 chevy suburban V2500 5.7L My cluster Mods-Nov 2007 overhead console Stereo install Round 2 Aug 2009 Heated/turn signal mirror upgrade |
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10-01-2008, 01:27 AM
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#7 |
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Account Suspended
Join Date: Dec 2007
Location: Unnapreciative, Trollville
Posts: 2,079
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Re: cruise control
Mine on my 78 c20 did that exact thing. I hit the button and dang near blew the engine when it revved up quick. also on the road it didn't matter what speed, if you hit the button it just floored the gas. On my truck the transducer was bad. the part on the inner fender with the speedo cables going to it. I bought a Remanned one from rockauto for about $100 and it fixed me all up. Works perfectly now. It is identical in appearance to the original unit.
Look it up in rockauto's catalog under Electrical>curise control transducer. The two terminal unit is for trucks with no cruise indicator light in the dash (like mine). The three terminal unit is for trucks with an indicator light in the dash. Last edited by 78 Chevyrado; 10-01-2008 at 01:29 AM. |
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10-03-2008, 05:13 PM
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#8 |
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what knocking sound?
Join Date: Feb 2005
Location: good ol North Dakota
Posts: 148
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Re: cruise control
Thanks, I'll look into that!
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1968 C-10 1953 belair two-door post 1955 chevy 3600 big window 1950 studebaker starlite coupe 1968 Impala SS |
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10-04-2008, 10:03 AM
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#9 |
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Tonawanda 454
Join Date: Mar 2004
Location: Liquid Sunshine State
Posts: 2,754
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Re: cruise control
mine has never worked in the time I have owned this 91... but it would have been nice to use it a few times...
no transducer on mine Cruise Control Module Cruise Control Sensor Cruise Control Servo Cruise Control Valve oh well I am selling it so no need to spend $400 in parts trying to figure out whats wrong...
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91 Chevy Suburban Tonawanda 454 R2500 - SOLD!!!  04 Dodge Durango 5.7L Hemi 2WD, 24K miles (as of July 2011) In the past 30 years about 90% of Fords are still on the road, the other 10% made it home. ------------------- |
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10-04-2008, 09:59 PM
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#10 | |
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In the Forgotten far North.
Join Date: Jul 2007
Location: Anchorage, Alaska
Posts: 2,627
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Re: cruise control
Quote:
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1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015 1990 chevy suburban V2500 5.7L My cluster Mods-Nov 2007 overhead console Stereo install Round 2 Aug 2009 Heated/turn signal mirror upgrade |
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10-05-2008, 10:30 PM
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#11 |
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what knocking sound?
Join Date: Feb 2005
Location: good ol North Dakota
Posts: 148
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Re: cruise control
FYI......I found out NAPA has them as well for about the same price (plus there's a NAPA three blocks from my house.
 ) Thanks again for the help.Kager
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1968 C-10 1953 belair two-door post 1955 chevy 3600 big window 1950 studebaker starlite coupe 1968 Impala SS |
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