Most cars have the diagrams for vacuum hose routing on a sticker somewhere either on the underside of the hood or in the engine compartment somewhere. If none exists, you'll need a manual for the car to see the complete routing.
SOURCE: vaccum lines
There is a diagram for that system under the hood above the radiator, the 2 lines go to 2 exhaust tubes, one is pressure and one is reference, the hose size is different so you can't get them mixed up, the EGR "box" is the EGR pressure transducer and the signal from that controls the EGR through the Power Train Control Module AKA the PCM. You have to use special
Hi-temperature silicone rubber hoses from the Ford dealer, ordinary rubber hose will just burn up in short order, they are around $15-20
SOURCE: vaccum line diagram for a 1988 honda accord
http://www.pauldesign.ru/honda/shopmanual/62se320.pdf
There is a Vaccum diagram in that manuel.
make sure you are looking at the correct engine diagram
You mostlikely have the A20A3 or A4 that is the diagrams you should be looking at.
Good luck.
SOURCE: i need a vaccum line
Below a link to the diagram you requested for a 1998 S-10 with a 4.3. Please feel free to post back with any questions. Best of luck.
Greg
Chevy S-10 Vacuum Diagram
SOURCE: I have vaccum lines and I am not sure where they
I don't have the diagram for vacuum lines for the 1988 model year, but I have one for the 1989 model year 2.5L engine VIN E Throttle Body Injection:
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