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1989 k5 cruise control vacuum help pic please

formercruiserhead

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Putting my project back together, took a ton of pics and searched the internet but cant find where the vacuum line for the cruise control goes. Diagrams I have found just say goes to engine vacuum. I know that just cant find where.

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One will probably go to a switch near brake light switch under dash. Does your truck have a speedo cable driven transducer on the driver's inner fender?
 
Putting my project back together, took a ton of pics and searched the internet but cant find where the vacuum line for the cruise control goes. Diagrams I have found just say goes to engine vacuum. I know that just cant find where.

View attachment 318835
As far as I remember, it should got to the fitting on the intake, right below your hand. You already have something on it, but was it actually supposed to get hooked to the throttle body?
 
Yes I have the switch near the brake pedal hooked up to a vacuum line. The other vacuum ports look like they are hooked up correctly, anyone have a pic of theirs?
 
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Vacuum reservoir #3 ??
 
I have an 89' and could look tonight if you still need help....

I don't think we have that transducer in there. Computer controlled now with the speedo eye on it.

Picture%20009.jpg

IMAG0143.jpg
 
I have an 89' and could look tonight if you still need help....

I don't think we have that transducer in there. Computer controlled now with the speedo eye on it.

View attachment 318922

View attachment 318923
Yeah the back of my guage cluster looks like that. If you could take a look at your cruise control that would be great because everything I find looks like it is supposed to go to a manifold vacuum fitting but some have two spots and mine only one and is taken by something else that is supposed to be there.
 
Putting my project back together, took a ton of pics and searched the internet but cant find where the vacuum line for the cruise control goes. Diagrams I have found just say goes to engine vacuum. I know that just cant find where.

View attachment 318835

The hose in your hand goes to the manifold 90* between coil and the erg valve. In your picture you have something pluged where this should go.
 
Thank you Jeff in co for all the pics. I found out that someone had ran a vacuum line (that looked like a perfect fit) from the vent port of the EGR solenoid to the manifold vacuum port that the Cruise control was supposed to hook up. Amazing now idles better and not so many weird idle problems. I basically bought this from a friend and haven't driven it a block before I tore it apart. Now almost back together to find all the issues like this one. Thanks again everyone.
 
Any idea where the hose from inside the cab comes through the firewall?
My 89 came with cruise control but it is all gone except the wiring harness.
The intake manifold suction next to EGR valve has been capped off.
I have no way of diverting air from defrost floor or vent
thank you
 
It is a small hard plastic line. Iirc it goes through near the blower motor. Under I think
 
Thanks Wes

:angry1:
Sh*t its been snipped looks like a bitch to get behind the ducts
On the list
 
they get old and crack break off. if you can get 1/32" rubber vac line and splice it on to broken part.
 

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