I have an 88f250 5.5L. I am trying to figure out how to hook up my TAD and TAB. I think that I need to connect to the two vacuum solenoids over by the coil. Could someone out there trace back the vacuum lines from those two solenoids and let me know where they plug into? I think one is for the bypass and one is for the diverter. I don't know which is which, nor do I know which port on the solenoids go to the manifold and which go to the diverter/bypass.

thanks

 

check out autozone.com - lots of good diagrams there.

 

Post your calibration number and what size engine.
I do not think you have a 5.5.

 

subford,

sorry, that was supposed to be 5.8L.

what's the calibration number? Where do I find that?

I will check autozone and see what they have

 

The calibration number is the number you need to use to get the right parts in the emission system.
This is also the only number that I can use to post the right vacuum diagram for your truck as there are 10 calibration numbers for the 88 Light truck with a 5.8L.
The number should be on your door post or under the hood.
It would something like:
8-64H-R10

 

subford,

I will check this afternoon after work and post this evening to tell you the number.

thanks man.

 

subford,

my calibration number is 8-76A-R10

Thanks

 

Would you like the Parts list for that truck also?

 

subford,

yeah, I would love the parts list.

Thanks a million

 

also, this diagram shows that my TAD and TAB solenoids are connected to a vacuum reservoir (I think that's what vreser means). Is that the big plastic box over on the passenger side of the engine compartment? And, man vac is manifold vacuum?

 

No, that is the "Carbon Can" AKA Carbon Canister.YES

 

Will post it in the morning.
My image site is down for maintenance.

 

Here is your parts list.
http://i54.photobucket.com/albums/g9...A-R10Parts.gif

 

Here is a key to the above diagram:

AIR BPV = AIR ByPass Valve
CPRV = Canister PuRge Valve
CARBON CAN = CARBON CANister
EVR = Egr solenoid Vacuum Regulator valve assembly
EGR = Exhaust Gas Recirculation valve
SOLV = SOLenoid vacuum Valve assembly
MAP = Manifold Absolute Pressure sensor
VRESER = Vacuum RESERvoir
MAN VAC = MANifold VACuum
DIV = air DIverter Valve
FPR = Fuel Pressure Regulator
PCV = Positive Crankcase ventilation Valve
TAB = Thermactor Air Bypass vacuum solenoid valve
TAD = Thermactor Air Diverter vacuum solenoid valve