Question about 2003 Jeep Grand Cherokee

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Po300 po301 po302 - 2003 Jeep Grand Cherokee

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Replace plugs and wires and try some drygas

Posted on Jan 01, 2014

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Posted on Jan 02, 2017

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PO300 and P1399 are random cylinder misfire detected.
PO301 cylinder 1 misfire
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I would say that you have damage to the ignition wiring harness or you ECM is failing.

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Which code you have po300 or po301.po302 .PO301,PO302 will be coil or module.PO300 could be bad spark plugs,vac. leak,clog fuel filter,bad fuel pump,bad battery.

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its like you have cylnder misfire or more , did you check all the wire .plug if any one bad or the wire have fire , and you check if the fuel pump good . i would like to ask you that , Did the problem come on suddenly or was some previous action or work done......

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Audi 2000,1.8 turbo,code po300,po301,po302


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If it has a lot of miles it needs a tune up.
Fill tank with high quality premium fuel
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1 Answer

Po302 code,po301,po300


usually a p0300 is a random missfire code due to a fuel problem probaly bad gas , use some in tank fuel treatment such as techron or lucas injector cleaner, after adding fuel disconnect negative terminal to batt, to clear codes and see what happens

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