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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 9511234 on May 22, 2011, 06:05:48 pm

Title: Vacuum line help- what is this and where does it hook to?
Post by: 9511234 on May 22, 2011, 06:05:48 pm

(http://i443.photobucket.com/albums/qq152/9511234/9396bbbd.jpg)


I thought the vacuum line to the temp sensor on the air cleaner was where it hooked up.

However looking at vacuum diagrams I cannot find it, and I think it tees off a line running to the carb, unless I'm missing a switch somewhere.

Title: Re: Vacuum line help- what is this and where does it hook to?
Post by: zieg85 on May 22, 2011, 06:46:47 pm

It is for the lock-up torque converter on your automatic transmission

Title: Re: Vacuum line help- what is this and where does it hook to?
Post by: 9511234 on May 22, 2011, 07:26:18 pm

Quote from: zieg85 on May 22, 2011, 06:46:47 pm

It is for the lock-up torque converter on your automatic transmission

Do you know if it ties to air cleaner or carb?

Title: Re: Vacuum line help- what is this and where does it hook to?
Post by: TexasRed on May 22, 2011, 07:42:44 pm

Looks like a switch for an ESC controlled distributor to me. What year is this for? It'll tie to the manifold vacuum port either on the carb or intake.

Title: Re: Vacuum line help- what is this and where does it hook to?
Post by: VileZambonie on May 22, 2011, 08:24:04 pm

Look at this schematic. See the tip in vac switch? Provide more information on your truck please.

Title: Re: Vacuum line help- what is this and where does it hook to?
Post by: 9511234 on May 22, 2011, 10:13:58 pm

Sorry- should put it in my sig.

1985 C10 305

This is pic of vacuum diagram as it is on the frame.

Is it the tip in vac sw?

(http://i443.photobucket.com/albums/qq152/9511234/c2b5c10f.jpg)