89 ford f150 4 WD dual tanks acts like it's starving for gas,no power, back firing in the motor,with clutch mashed and giving gas rpms go to 3 n fall back to 1 can someone please diagnose my problem?

Asked by ROHONDA Mar 25, 2015 at 04:26 AM about the 1989 Ford F-150 S Standard Cab 4WD LB

Question type: Maintenance & Repair

Been in shop four times
now n still isn't fixed.
also has loud whistle
from a part underneath
truck can see it from
under driver door.

300

Jacob answered 9 years ago

Vacuum lines maybe

Mark helpful

530

pyrolion answered 9 years ago

Check your timing, timing chain! Check or replace fuel filter and fuel pump! Is it carb or fuel inj.?

Mark helpful

Your Answer:

89 ford f150 4 WD dual tanks acts like it's starving for gas,no power, back firing in the motor,with clutch mashed and giving gas rpms go to 3 n fall back to 1 can someone please diagnose my problem? 2 Answers

Been in shop four times now n still isn't fixed. also has loud whistle from a part underneath truck can see it from under driver door.

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