Misfire issues
Thread Starter
|
Registered User
Joined: Nov 2015
Posts: 14
Likes: 0
Misfire issues
Need help friend went through water. Ran rough on way home had 6 misfire codes we changed the plugs and coils run awesome for one day only then same codes came up with same cylinders. Was needing help any help would be appreciated. It's a 2002 4.7
Last edited by Grimace71; Oct 2, 2019 at 09:21 AM.
Professional
Joined: Jan 2006
Posts: 205
Likes: 12
From:
I believe that only the ram 1500 had the 4.7 in the ram series in some models as I know of several , but perhaps look under the truck and see if there are any type of loose wiring that may interfere with the running and check the intake as stated and did you change plug wires as well ? Maybe double chech connections to the plugs an coils an make sure its all plugged in properly
I believe that only the ram 1500 had the 4.7 in the ram series in some models as I know of several , but perhaps look under the truck and see if there are any type of loose wiring that may interfere with the running and check the intake as stated and did you change plug wires as well ? Maybe double chech connections to the plugs an coils an make sure its all plugged in properly
Veteran
Joined: Feb 2011
Posts: 437
Likes: 1
From: Chicago suburbs
Unless it died while in the water, I would not expect mechanical damage. You should check the air filter to make sure its dry. Its a little strange that changing the plugs and coils improved it for a while.
I would think about sensors getting wet and retaining somewhat conductive water. Probably would not hurt to check for moisture in the crank and cam sensors connectors.
I would think about sensors getting wet and retaining somewhat conductive water. Probably would not hurt to check for moisture in the crank and cam sensors connectors.
Registered User
Joined: Oct 2019
Posts: 2
Likes: 0
Misfire
I believe that only the ram 1500 had the 4.7 in the ram series in some models as I know of several , but perhaps look under the truck and see if there are any type of loose wiring that may interfere with the running and check the intake as stated and did you change plug wires as well ? Maybe double chech connections to the plugs an coils an make sure its all plugged in properly
Registered User
Joined: Oct 2019
Posts: 2
Likes: 0
Misfire
Sorry it was a week later that it came back with the same cylinders coming up bad
Trending Topics
Registered User
Joined: Sep 2019
Posts: 10
Likes: 0
Doesn't that truck have a distributor cap? Maybe its loose or damaged and is getting moisture under it causing the multiple cylinder misfire. You already did plug and wires, so I would just change out the cap and rotor while your at it.
Veteran
Joined: Feb 2011
Posts: 437
Likes: 1
From: Chicago suburbs
When you changed the plugs did you disconnect the battery? If so that might have reset the fuel trim mappings.
I would want to look at live data to continue diagnostic before additional parts but checking for moisture in electrical connectors does not cost any money and is pretty quick.
I would want to look at live data to continue diagnostic before additional parts but checking for moisture in electrical connectors does not cost any money and is pretty quick.