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09/09/2021 5:46 pm
Topic starter
I have a 2006 Jeep Commander 4.7 that is giving a multiple cylinder misfire code. This Jeep has over 210K miles. I ran my scan tool and it said cylinders 1,3,5,7 were misfiring. Cylinders 2,4,6,8 were not. I cleared the codes and then waited and got the same code and readings. Where should I start?
When started the short term fuel trim bank 1 goes as high as 32% while the engine idles very rough.
3 Answers
2
09/09/2021 11:37 pm
engine is running too lean. Check for vacuum leaks and blown intake gaskets.
1
09/09/2021 5:51 pm
Check the spark plugs first. Then the fuel injectors and fuel pressure. You may also have damaged wiring.
1
10/09/2021 10:29 am
Generally if the misfires are on the same bank and are all (1-3-5-7), I would suspect bad fuel injectors.
