HELP!! truck running rough!
02-01-2015, 07:37 AM
#13
Senior Member
Eventually it will throw a code. The problem has to persist through so many cycles of the ignition running before it will trip it. Makes it a little harder to diagnose before the light comes on but not impossible. When is the last time you gave it a full tune up? Plugs, wires, coils, fuel filter, air filter, clean MAF? Quality parts? 9 times out of 10 you'll cure a skip with a good tune up.
02-01-2015, 03:40 PM
#15
Senior Member
02-01-2015, 03:53 PM
#16
Senior Member
The OEM coil packs hardly ever go bad, and when they do go bad, 99% of the time they will throw misfire codes for 2 cylinders, since each coil pack has 2 coils that each fire 2 cylinders, so if the cool for #7 is bad, it would also misfire on #4, since that uses the exact same coil. I would hold off on the coil packs, and start with plugs and wires. Also pay special attention to cylinder #7 (driver's side, 2nd from the rear) when you take the old plug and wire off.
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aloha_hawaii (02-01-2015)
02-01-2015, 05:22 PM
#17
Ford Owner
before you run your money through a shredder, check on the missfire at #7. This could just be a bad or loose spark plug. Could also be a bad wire. It is unlikely that the coil is bad.
the P320 code is indicating that you are getting a bad reading from your crank shaft sensor. This is located behind the A/C compressor where it tends to collect a lot of dirt, grease and oil. It could be that the sensor is real dirty of the connection is dirty and giving a bad reading to the PCM. Regardless, fix the P307 at number 7 first and see how it does. Clean the socket real good with a round plumbers wire brush, rags, and WD40 to make sure the plug is seated properly. Then install your plug. Check you plug wire with a Q tip to see if it is badly corroded and therefore, not giving a good connection to your spark plug. If it is, replace. Since a plug is low cost, I would just go ahead and put in a new one. Use Motorcraft plugs only.
Good luck
the P320 code is indicating that you are getting a bad reading from your crank shaft sensor. This is located behind the A/C compressor where it tends to collect a lot of dirt, grease and oil. It could be that the sensor is real dirty of the connection is dirty and giving a bad reading to the PCM. Regardless, fix the P307 at number 7 first and see how it does. Clean the socket real good with a round plumbers wire brush, rags, and WD40 to make sure the plug is seated properly. Then install your plug. Check you plug wire with a Q tip to see if it is badly corroded and therefore, not giving a good connection to your spark plug. If it is, replace. Since a plug is low cost, I would just go ahead and put in a new one. Use Motorcraft plugs only.
Good luck
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aloha_hawaii (02-01-2015)
02-01-2015, 07:32 PM
#19
The OEM coil packs hardly ever go bad, and when they do go bad, 99% of the time they will throw misfire codes for 2 cylinders, since each coil pack has 2 coils that each fire 2 cylinders, so if the cool for #7 is bad, it would also misfire on #4, since that uses the exact same coil. I would hold off on the coil packs, and start with plugs and wires. Also pay special attention to cylinder #7 (driver's side, 2nd from the rear) when you take the old plug and wire off.
02-01-2015, 07:34 PM
#20
before you run your money through a shredder, check on the missfire at #7. This could just be a bad or loose spark plug. Could also be a bad wire. It is unlikely that the coil is bad.
the P320 code is indicating that you are getting a bad reading from your crank shaft sensor. This is located behind the A/C compressor where it tends to collect a lot of dirt, grease and oil. It could be that the sensor is real dirty of the connection is dirty and giving a bad reading to the PCM. Regardless, fix the P307 at number 7 first and see how it does. Clean the socket real good with a round plumbers wire brush, rags, and WD40 to make sure the plug is seated properly. Then install your plug. Check you plug wire with a Q tip to see if it is badly corroded and therefore, not giving a good connection to your spark plug. If it is, replace. Since a plug is low cost, I would just go ahead and put in a new one. Use Motorcraft plugs only.
Good luck
the P320 code is indicating that you are getting a bad reading from your crank shaft sensor. This is located behind the A/C compressor where it tends to collect a lot of dirt, grease and oil. It could be that the sensor is real dirty of the connection is dirty and giving a bad reading to the PCM. Regardless, fix the P307 at number 7 first and see how it does. Clean the socket real good with a round plumbers wire brush, rags, and WD40 to make sure the plug is seated properly. Then install your plug. Check you plug wire with a Q tip to see if it is badly corroded and therefore, not giving a good connection to your spark plug. If it is, replace. Since a plug is low cost, I would just go ahead and put in a new one. Use Motorcraft plugs only.
Good luck
