Question about 2000 Ford F250 Super Duty Crew Cabs

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Code po301 and po308 ,what should i check first , idles rough

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First 2 things i would check are first your plug wires. Your engine is telling you number 1 and number 8 are missfiring. Check your wires and the routing for the wires and next i would check the boots. If the boots get cracked or a hole in them they will missfire to the head thru the boot. check for routing on your plug wires. These engines will missfire if the wires are crossed. There may be a service bulletin on your engine for this. If you change the plug wires they need to be routed exaclty as they were before.

Posted on Feb 02, 2010

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Engine code for 2003 lincoln ls v8 is coil pack h. wihich cylin der is that?


Invalid Code on a Lincoln L/S 2003 up

Cylinders on Fords go

A,B,C,D,E,F,G,H
1,2,3,4,5,6,7,8
PO301,PO302,PO303 etc

All the same thing

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P0300


Google----PO300
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I have a 1996 crown vic i need to know these trouble codes po301 po304


PO300 Codes-- are cylinder misfires

PO301 thru PO308

Last # is the cylinder

Could be bad ignition coil for a cylinder
or a coil pack for that side,depending what
engine you have

#1 &#4 are at the front & back of the passenger
side of your motor or firewall side if transverse

You will need to provide details of who worked on it
& exactly what was done besides replace a coil based
on a code

Codes aren't very good with COP Ignition but a complete
coil pack on one side should take care of some issue

Vacuum Leaks & other items can cause misfires & the codes
don't tell you to replace ignition parts as you may have

Feb 14, 2013 | 1996 Ford Crown Victoria

1 Answer

Check engine light comes on when going up hill and car hesitates


Put a scanner or code reader on it, and get the code,
that set the MIL Lamp on the dash,diagnose from there.

Most likely a bad COP Ignition Coil

You can unplug EGR Valve,plug hoses and test drive to
confirm that issue,if you get an EGR Code

Cylinders from front to back

Pass Side 1,2,3,4,
Drivers Side 5,6,7,8

Coils about $60,00 at auto parts store, do yourself

You will get PO301 thru PO308
Last number is the cylinder #

Nov 28, 2010 | 2005 Ford Expedition

1 Answer

How do you change an ignition coil on a 2003 lincoln ls


Remove the coil covers on top of the valve covers-to get to the COP-Ignition Coils. I believe you need a 7mm socket and 7mm small wrench. You need a PO301 to PO308 code- for a bad coil. Their about $60.00 at auto part store. Just do the one that fails.

Cylinder #1 is front of vehicle/pass side. 1 thru 3or4
Cylinder #4or5 to 6or8 on driver side.

Apr 23, 2010 | 2003 Lincoln LS

2 Answers

98 ford expidition 4.6 codes current po171 po174 and has po304 and po308 veh idles little rough repaire vaccumat rear of throttle body,is this a lower plenium leak veh has 177,00 mileson it


hi guess your engine has lack of power also a rough tick over ?your codes tell me you are running lean on bank 1and2 this can be due to many things its a matter of checking of one at a time 1 a bad coolant temp sensor 2vacuum leak 3 dirty injectors also reach over the top of your engine behind the intake dead centre of the windscreen there is a 9odeg rubber elbox check for a hole if thats your problem its only 3usd good luck please rate this answer thanks pete

Nov 27, 2009 | 1998 Ford Expedition

2 Answers

98 E-250 Rough Idle; codes p0156,p1131,p1151,p0301,p0171,p0174+


po301 thru po306 all misfire codes cylinder 1-6 remove plugs and replace them..... set the plug gap first
i suggest u replace the wires also if they never been replaced all these misfire codes can set the others and one is for the oxygen sensor ( 02s or HO2S) CIRCUT MALFUNCTION do u know how to check wireing systems
do the tune up plugs (set gap) .052-.056 change the fuel filter also. clear the codes hows it run
this info is for 98 E-250 4.2Litre
what engine do u have 4.2L or 4.6L i know it is a v-6 by the codes

Dec 15, 2008 | 2003 Ford E250

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