Need a diagram for an v-8 88 mercury cougar on vacum lines
If you can find it, Ford published the "Electrical & Vacuum Trouble-shooting Manual" for the 1988 Thunderbird/Cougar. Very good diagrams and step-by-step diagnosis for the home mechanic. You will need a hand vacuum pump/brake bleeder set to troubleshoot.
Have you looked around the engine compartment? Many vehicles have a sticker with the vacuum diagram on it somewhere there (usually on top of the radiator mounting frame, but sometimes on a fender well).
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were the vacume line at
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