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Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23821
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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F-150: 1997 F150 not sending any codes but missfiring on #5

Customer Question

1997 F150 not sending any codes but missfiring on #5 have replaced coil spark plugs erg valve doesn" start until gets to overdrive
Submitted: 2 years ago.
Category: Ford
Expert:  Gary replied 2 years ago.
Hi there,
Have you done a compression test yet?
Have you swapped the NO.5 fuel injector with another cylinder?
Customer: replied 2 years ago.
Have replaced #5 fuel injector
Customer: replied 2 years ago.
Dropped one side of catlic converters no change
Expert:  Gary replied 2 years ago.
Hi again,
Have you dona compression test?
Does it have injector pulse on CYL 5?
Maybe your spark plug is faulty? Seen that many times.
OR the spark plug. Did you check their resistances?