| Steel vacuum line to transmission modulator [message #370403] |
Wed, 24 August 2022 14:42  |
Beach Coach
Messages: 50
Registered: December 2011
Karma: 1
|
Member |
|
|
I was checking the steel vacuum line between the intake manifold and the transmission modulator. I can blow compressed air through the line from the modulator end, but not from the intake end. The compressed air will only flow from the modulator to the intake manifold, but not from the intake manifold to the modulator. Shouldn’t the compressed air flow in both directions?
Thank you, the advice received is much appreciated.
hugh MacDougall
Antigonish, Nova Scotia
1975 Eleganza II
[Updated on: Thu, 25 August 2022 05:34] Report message to a moderator |
|
|
|
|
|
| Re: Steel vacuum line to transmission modulator [message #370405 is a reply to message #370403] |
Wed, 24 August 2022 18:30  |
 |
Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
|
Senior Member |
|
|
Beach Coach wrote on Wed, 24 August 2022 15:42I was checking the steel vacuum line between the intake manifold and the transmission modulator. I can blow compressed air through the line from the modulator end, but not from the intake end. The compressed air will only flow from the modulator to the intake manifold, but not from the intake manifold to the modulator. Shouldn’t the compressed air flow in both directions?
Hugh,
And it has a pinched area to restrict the flow.... That can get plugged up with any piece of micro crud. BTDT
Try again, but this time with carburetor cleaner. Hopefully it will wash what ever it is out of there.
Don't expect to see it come out even if you capture everything in clean rags.
If you reverse the flow a couple of time it will probably soon go both ways.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
