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john -aka eauto
john -aka eauto, The Car Guy
Category: Ford
Satisfied Customers: 15062
Experience:  ase tech over 15 years in the field
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I have a 2002 ford f150 I changed spark plugs in it and now

Customer Question

I have a 2002 ford f150 I changed spark plugs in it and now I have a intermittent miss checks coils by unplugging each one while it was running and they all changed just wondering if you have ever had this problem other then me
Submitted: 5 months ago.
Category: Ford
Expert:  john -aka eauto replied 5 months ago.

any engine light or codes?

Customer: replied 5 months ago.

No there are not.

Expert:  john -aka eauto replied 5 months ago.

how many miles? are the coils original? was it skipping prior to the plug change?

Customer: replied 5 months ago.

Just over 100k coils are not original and it was not skipping prior to changing the plugs

Expert:  john -aka eauto replied 5 months ago.

i would replace all the coils you can buy all 8 on amazon for 50 bucks

Customer: replied 5 months ago.

Did resistance check on all coils and they all check out over 0.66 ohms for stock coils is there any thing else that could be going on with it. It is bad hesitation at low rpms but when you get into hight rpms it straightens out.

Expert:  john -aka eauto replied 5 months ago.

is it a hesitation or a skip?

Customer: replied 5 months ago.

Honestly it seems like both gets worse when you disconnect one by one when it's running it has a slight popping noise all the time when it's in park neutral or drive

Expert:  john -aka eauto replied 5 months ago.

and still has not tripped a code?

Customer: replied 5 months ago.

No it has not

Expert:  john -aka eauto replied 5 months ago.

does your scan tool have a misfire counter?

Customer: replied 5 months ago.

What do you mean by that

Expert:  john -aka eauto replied 5 months ago.

can you watch misfire counts on your scan tool?

Customer: replied 5 months ago.

No I cannot

Expert:  john -aka eauto replied 5 months ago.

did you gap the plugs? did you install motor craft plugs?

Customer: replied 5 months ago.

Ngk iridiums gapped correctly

Expert:  john -aka eauto replied 5 months ago.

I would sill replace the coils...clean the throttle body and the maf...without watching misfire counts or codes its a guessing game

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