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Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

Misfire hard start rough idle low power

  • autojoe
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3 years 11 months ago #52212 by autojoe
Misfire hard start rough idle low power was created by autojoe
P0300..... 2011 jeep grand Cherokee 3.6. Does anyone know if gdi don't think so. Trying to get info before I look at it. After getting fuel it started acting up. It has 6cyl 3.6. I was thinking it was flex fuel. If symptoms after fueling could be caused by skewed fuel composition sensor or out of range ethanol calculation. Customer put new coils and plugs on it. Seemed awful funny happened after fueling. Bad gas? Thanks. 

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  • juergen.scholl
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3 years 11 months ago - 3 years 11 months ago #52214 by juergen.scholl
Replied by juergen.scholl on topic Misfire hard start rough idle low power
So, this is the gen1 pentastar engine? On 2011 direct injection wasn't available yet but yes, it came as flex fuel.


en.m.wikipedia.org/wiki/Chrysler_Pentastar_engine

 
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Last edit: 3 years 11 months ago by juergen.scholl.

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  • autojoe
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3 years 11 months ago #52215 by autojoe
Replied by autojoe on topic Misfire hard start rough idle low power
Thank you. Have to check out if flex fuel problem. 

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3 years 11 months ago #52216 by autojoe
Replied by autojoe on topic Misfire hard start rough idle low power
I usually see rich codes. Just p0300 and 02 sensor slow response code. All symptoms started after fueling. 

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