need a vacuum diagram
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Senior User
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From: bull shoals , ar
need a vacuum diagram
i need a vacuum diagram for my new to me 78 F150 SC 400 engine. i went to autozone they did not have one for a 78 400 but had for a 79 but it was too small for me to read. can someone post a pic' of one i can get detail of. my 78 only has one hose from carb to the dist. if it helps its a auto trans the water neck has two vacuum switches one has two prongs the other has three prongs for hoses. thanks
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
Originally Posted by bomberboat
i need a vacuum diagram for my new to me 78 F150 SC 400 engine. i went to autozone they did not have one for a 78 400 but had for a 79 but it was too small for me to read. can someone post a pic' of one i can get detail of. my 78 only has one hose from carb to the dist. if it helps its a auto trans the water neck has two vacuum switches one has two prongs the other has three prongs for hoses. thanks
What part do you want, a dizzy vacuum advance diaphram, or something else?
If it's the dizzy vacuum advance, there's only one listed for your application, It was used on all 1977/79 F100/350's 400 - A/T, as long as it's non California. If you find this one I listed is incorrect, the truck may be from CA, or the dizzy has been changed, not uncommon on a 30 year old vehicle. To verify if the dizzy is correct, look at the body below where the cap rests...there's an ID number there, Sample: D7AE-12127-EA or D7TE-12127-AP
D5AZ-12370-A .. Distributor Vacuum Advance (Motorcraft DD-714)
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You can find a diagram in my gallery in my Emissions album.
You also needed to list
Trans
AC or Non-AC
axle code
State of operation (49 state or Calif)
You also needed to list
Trans
AC or Non-AC
axle code
State of operation (49 state or Calif)
Last edited by TigerDan; Apr 19, 2007 at 01:06 AM. Reason: Removed Dennis' unneccessary comments concerning posting in the wrong forum
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TheSojourner
1973 - 1979 F-100 & Larger F-Series Trucks
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Sep 29, 2008 07:50 PM
