Injectors tick. Excessive noise means they are starting to stick. My 24 lb Ebay specials were noisy, and about 6 months later one stuck wide open. A good way to wash out a cylinder.
Replace them now before you have problems.
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1988 Mustang GT
11.8 @ 123 (7/14/01)
1992 BadAzz Wrangler
1993 Explorer
See my car at:
www.mustangworks.com/cgi-bin/moi-display.cgi?179