I have a '97 4.2L F-150 that has been hesitating lately. Usually under load(accelerating). I've ran the books trying to diagnose it. Checked injectors(by listening to them), seem ok. Checked the sensors. The coil's primary resistance is within range, the secondary (should be below 11.5Ohm) is 15Ohm. I have a K&N filter, wondering if the MAF sensor is clogged from the oil. Any suggestions would be greatly appreciated. Just don't want to pay the dealer hard earned $ for a simple fix.

 

I cannot help, for mine does the same darn thing. It hesitates for about a second or so then speeds up. Seems wierd, I can't figure it out either.

Crotteau

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1997 F150 4x4

4.2L V6
Open Filter Housing
K&N Filter
Factory 5-Speed
3.08 Gears
3" PA Body Lift
305/70/16 Goodyear AT/S
16x8 American Racing Baja

2000 BOMBARDIER DS650

Completely Stock

 

It's fixed! Ended up changing out the spark plug wires. Hesitation is gone, and power seems to be restored. Of course, each individual truck has it's own personality, so it might not fix yours.

 

 

I was going to say, sounds like a simple tune-up would do the trick. Glad you got it fixed.