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Have code po305 - 2002 Ford Escape

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2004 ford freestar 3.9lcode po305.replaced plugs wires coil and egr .still has code po305


Egr wouldn't have anything to do with it , not just one cylinder . Is the fuel injector firing ? Do you know how to test a computer driver ? ( transistor ) Injector Circuit Wiring Diagram How to test fuel injector circuit with basic tools open control wire

Jan 10, 2017 | Ford Cars & Trucks

1 Answer

Codes PO300-PO305 TCS and emission lights on, runs OK except sl rough at lower speeds


you have multiple misfire po300 and cylinder 5 po305 misfire.the misfire is causing the rough running.The computer has disabled your traction control.You either have carbon in the EGR which simulates a vacuum leak,bad spark plugs,a leaking intake manifold,or low fuel pressure from a bad pump or clogged filter.
i would start with the spark plugs and fuel filter

Apr 21, 2015 | 2001 Honda Odyssey

1 Answer

Why does 2003 kia sedona engine code po305 come on ?


this indicates a miss fire on cylinder #5. can be caused by bad plug, plug wire, ignition coil, fuel injector problem either dirty or electrical, vacuum leak at the intake runner, a compression problem.

Sep 04, 2014 | 2003 Kia Sedona

1 Answer

1998 volvo s70 2.4 glt turbo


code p0102 refers to MAF/VAF sensor ---low input ===causes --wiring short to ground. MAF/VAF sensor
code po172 refers to system too rich --bank 1=== causes ---intake blocked --EVAP canister purge valve---fuel pressure ---HO2S sensor
code po random misfires ---plugs --wiring ---injectors--low compression
code po305 refers to cylinder 5 misfire detected ===causes --engine mechanical fault--ignition/ fuel system ---injector ---ECT/MAF

I would check that the air filter is not blocked first as it affects the MAF/VAF sensors . Have a fuel pressure system pressure test done

Feb 13, 2014 | Volvo S70 Cars & Trucks

1 Answer

1998 Ford Contour 2.5 litre, 30,000 km. Started cold after sitting for a day in -20C temperature, and idles for little while then quits, and smells like gas. Idle speed fluctuated and surged up and down...


PO171 and P1131 point to lean codes on bank PO174 and P1151 point to lean code on bank PO305 is missfire on cyl 5

the lean codes is probably a vacuum leak or maybe a MAF sensor is bad or dirty

missfire is dependant on engine if a V10 it may be a coil actually pretty likely on the modulars not uncommon thats for sure
sorry forgot to add that its says missfire on #5 cant remember if that one is the first on the left or last on the left facing the engine vacummn leak could be those dang auto hubs got it stuck in the mud and they did not engage I need to buy some new ones took them apart to clean them out this summer

Dec 16, 2013 | 1999 Ford Contour

1 Answer

Mercury grand marquis 2001 change spark plugs and coil but misfire code po305 still check light still on plus hestiating when accerlating on gas pedal


If you changed an individual ignition coil based on
a PO305 & that didn't resolve the issue, then either
the code didn't help & you have a different coil bad or
several

Put back the old coil on #5 & check codes again & walk
a new coil until you get the bad one or more

If you have a shop put a scan tool on it-- use Mode #06
to check misfire counts

Sometimes that doesn't get a really hit & miss coil & your
back to walking all those coils not replaced in the last couple
years

Jan 27, 2013 | 2001 Mercury Grand Marquis

1 Answer

Engine light on, codes are PO300, PO302, PO305. what do these mean?


These are cylinder misfire codes meaning ;
P-0300 = RANDOM OR MULTIPLE MISFIRE
P-0302 =CYLINDER #2 MISFIRE
P-0305 =CYLINDER #5 MISFIRE
Check spark plugs, wires, and coil(s)

Mar 31, 2010 | 2006 Kia Sorento

2 Answers

I have 1999 318 4x4 dakota with fault coads


These are misfire codes.This means that your vehicle is missing.The 300 is a random misfire and the 305 is for cylinder 5,and the 306 is for cylinder number 6.Check the plugs if they are good then you could have bad coils.They are top of the plugs.Hope this helps.Good luck.

Feb 25, 2010 | 1999 Dodge Dakota

2 Answers

2002 ford windstar showing obd2 codes po303,po304,po305 and idiling ruff and wont run over 45 mph and has low miles, how do i fix it ,thanks sincerely mark


might be the coil pack is bad, wires, plugs, o2 sensors, dirty injectors, catalic converter ( only if you smell rotten eggs ) . cylinders are misfireing.

Mar 23, 2009 | 2002 Ford Windstar Cargo

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