F250
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7th Gear
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F250
I have a 2017 f250 that is misfiring in all cylinders I’ve changed sparks plugs, coil packs, wires and crankshaft positioning sensor. I have a snapon P1000 scanner and i can see that its misfiring but it not throwing any more codes. I have no engine lights and the scanner isnt showing any codes but it is showing misfires on current drive cycles and in the latest drive cycles. Im just annoyed and at a loss on what it could be..
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7th Gear
Joined: Apr 2023
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yes i realized that after i posted it. But i have not tested the injectors nor the harness. Fuel related issues was my next guess but didnt know if someone knew or had the same issues
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7th Gear
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no codes but no its at 156,000 miles i changed spark plugs coil packs wires and crankshaft position sensor and i relearned the system but its still misfiring the scanner is picking up that every cylinder is misfiring but you cant really tell unless the engine is under load like barely giving gas to keep up speed. It misfires from 1800-2500 RPMS. normal driving.
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Fleet Mechanic
Joined: Mar 2021
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Did you change 16 plugs, coils, wires, and cps because it was doing this? Or now it's doing this after the swap? Did you replace with all OEM from a reputable source or did you buy aftermarket? Does your scan tool support Ford mode 6 misfire tool?
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7th Gear
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yes i did all 16 plugs all 8 coil packs all 8 wires. I dont know what CPS is so im goin to say no. And now i wemt to oreillys and get the parts. Except wires they cane from ford. And I honestly dont know if it does or not its a snapon P1000 scanner.
Fleet Mechanic
Joined: Apr 2015
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From: Phelan CA
Also, did you check/load test battery?
Fleet Mechanic
Joined: Mar 2021
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Are you on the stock original battery? They are not very good to say the least, if you are just do yourself a favor and change it to a Odyssey AGM or Northstar AGM or Batteries Plus X2power AGM. If you were misfiring on every cylinder and changed all that stuff and did the CPS relearn you need to look at the battery/alternator system, fuel, vacuum leaks... the things common to all cylinders. I am still a little shocked you aren't seeing a code recorded but I don't know what the qualifications are exactly.
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7th Gear
Joined: Apr 2023
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Are you on the stock original battery? They are not very good to say the least, if you are just do yourself a favor and change it to a Odyssey AGM or Northstar AGM or Batteries Plus X2power AGM. If you were misfiring on every cylinder and changed all that stuff and did the CPS relearn you need to look at the battery/alternator system, fuel, vacuum leaks... the things common to all cylinders. I am still a little shocked you aren't seeing a code recorded but I don't know what the qualifications are exactly.
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Oct 22, 2021 06:19 PM