Clogged fuel filter and lines
Symptoms
Poor running, hesitation, loss of power, rough idle.
Cause
Decades of crud accumulates in the tank. Fuel filters (especially inline types) clog. Rust particles from old steel tanks block injectors.
Fix
Replace the fuel filter as a matter of course.
If the tank is rusty inside, consider removal and professional cleaning or replacement.
Blocked injectors can sometimes be cleaned ultrasonically, but replacement may be necessary.
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