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> 2007 Endeavor - Multiple Misfires, Replaced coil on cyl 4 then misfire on cyl 6 - baffled
post Dec 2 2011, 05:41 PM
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Joined: 3-May 08
Member No.: 57,100
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Location: USA
Drives: 2007 Endeavor

2007 Endeavor LS AWD - 82k Miles

I recently had both check engine and tcl lights come on solid a day after a 65 mile trip through rain ice, and bad weather. Accompanying these lights on is a rough idle at low idling rpm's and vehicle shaking at higher ones when I tried to drive it. There is 1/2 tank of 91 gas and the gas cap is locked tight. I checked the oil and it was fine, I added fuel injector cleaner along with dry gas and ran the vehicle about 15 miles. None of this seemed to help. I took the vehicle to Autozone and had them read the error code for me which was P0300. The autozone person further said it was a Cyl #4 misfire. I took the vehicle to a repair shop and they ran a diagnostic. They proceeded to change out the coil on cyl #4 and a new error code showed up identifying a misfire in cyl. #6. They checked all the plugs and wires and found no problems. There was no evidence of a manifold gasket leak either. The timing belt on the vehicle has not yet been changed. After this they stopped and said I should take it to a dealer who has better diagnostics to identify the problem. I am concerned about what could be wrong. I have read alot and seems like most of the usual suspects have been eliminatedas the cause of the issue. Any help before I take this to a dealer would be greatly appreciated.
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post Dec 20 2011, 05:57 PM
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Location: Canada
Drives: 2004 Mitsubishi Endeavor Limited awd

it is p0300 which is multiple misfire, this could be many things, I do not think so that is related to cylinder , in my opinion it is electrical/sensor/airflow problem. I have same problem/code and looking into it.
Check MASS AIRFLOW SENSOR (intake air flow temperature sensor), this could be your and mine problem.Looking to find how to test this sensor. I red on internet about this.
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