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sprinkles08, ASE Certified Technician
Category: Ford
Satisfied Customers: 22993
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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Aloha first time working 2007 4.2 6cly friend 4500 miles

Customer Question

hi aloha first time working 2007 4.2 6cly friend 4500 miles first tune up from new replaced spark plugs, 2 O2 sensors fuel filter had a lot carbon
could you steer us please
kind of manual transmission
2gear medium excelration back fire
any you could recommend
went and redlined all gears working better thanks a million Leroy
Submitted: 1 year ago.
Category: Ford
Customer: replied 1 year ago.
Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Customer: replied 1 year ago.
2007 f150 6cyl
first tune up on this truck spark plugs never replaced before 45,000
driveability problems replaced O2 sensor spark plugs
fuel filter air cleaner had a lot of carbon
gotten a lot better driving I drove redlined 1-3 gears
( happen around second 1800-2500 rpm
engine has backfires in second gear !!!!!
Expert:  sprinkles08 replied 1 year ago.

Hello and welcom to JustAnswer!

I've seen many cases over the years where spark plugs were damaged in transit and would cause issues that weren't there before a tune up was done. Did this problem start as a result of the work that was done or were you trying to repair this issue when the plugs were replaced?

Customer: replied 1 year ago.
issue was their before I started !!!
I like info please looking into something like cross fire
from coil pack because smooth throttle very intermittent
wot it backfire an than kind da goes smooth......
slow excelration nearly any gotta think coil
after say 1800-2300 rpm taking over onto wot smooth
Customer: replied 1 year ago.
it was their before replacement???? were the coil block a problem after that amount miles 45,000,
Heat soak any problems Leroy thanks for your help
kinda like too know about coil jumping
Customer: replied 1 year ago.
happy holidays friend Leroy plugs good new Bosch plugs
all got spark O2 sensors Nippon denso coil pack didn't have caroission on coil box pack what's your take Leroy
Expert:  sprinkles08 replied 1 year ago.

Have you checked for fault codes?

Customer: replied 1 year ago.
none codes thanks Leroy
Expert:  sprinkles08 replied 1 year ago.

I assume the wires were not replaced?

If not, are you able to spray them with water and run the truck in a dimly lit area to look and listen for arcing?

Customer: replied 1 year ago.
now wires were not replaced will check Thursday all clip were intact
before and after will check Thursday night thanks
how often due you Change coil pack.... ? ? ? leroy
Customer: replied 1 year ago.
if wire are good what's the next thing we look into thanks leroy
Expert:  sprinkles08 replied 1 year ago.

If it feels like an ignition issue then most likely you have a wire or coil issue, wires would be much more likely, especially with the age and if they haven't been replaced. You can try spraying the coil at the same time if you don't see anything with the wires.