Question about Ford F-150

2 Answers

Check engine light on - tech found po303 code and said #3 plug needed replacement. Should I replce all six plugs?

Engine ran rough and had check engine light come on - tech said #3 plug was bad and needed replcement - should I replace all of them?

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 139 Answers

For the cost i would,if one when bad they other one
might not be that far.

Posted on Apr 20, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Ford Master
  • 1,779 Answers

How many miles on the plugs and truck, what engine/year? If one plug is bad, yes, I would change all plugs. Put the best plugs in you can afford, as they will last the longest (platinum plugs). I questioned the year and engine, because if this was a very old or very high mileage vehicle with engine issues (example, high oil consumption) I would give a different answer. (just replace the one plug in that case, and not a high priced platinum plug)

Posted on Apr 20, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Codes 303, 336, and 1870


Engine misfire code probaly have a coil or plug wire going bad

Feb 24, 2014 | Cars & Trucks

3 Answers

2002 Buick Century Limited 3.1L rough idle and P305 code shows up


You have an interference motor. If you had to replace the heads due to the valves possibly touching the motor, you have to consider rechecking the compression after you replaced the heads. I had the same motor that had an intake leak. I found frozen rings on the number 1 piston as well as a bent pushrod. Ultimately, the camshaft had broken due to coolant getting to the bearings. If the spark is good, the fuel is good, then the only other problem you'd have would be compression.

Jan 13, 2014 | 2002 Buick Century

1 Answer

Po303


code po303 refers to cylinder 3--misfire detected===causes --engine mechanical fault---wiring---ignition/ fuel system---injector---ECT/MAF sensor---ECM. check plug and HT lead to no 3 cylinder. Check that the injector to 3 cylinder is operational and not blocking or squirting. Have a compression test done to check for compression / gasket problems

Dec 14, 2013 | 2006 Chevrolet HHR

1 Answer

Engien code po303 po1399


I have 2002 Accord se I have engine light on, cod is po303 cly 3 misfire and po1399 ignition manuf- may misfire, I replaced new plugs, wires, distributor and cap, o2 sensor,head gasket, an Light still cam on. can any one help.

Jul 28, 2012 | Cars & Trucks

1 Answer

Misfiring Problems, Need Help


po303 is cylinder 3 misfire. I would start with cylinder #3 spark plug wire, look very carefully for chafed, worn or cracked spark plug wire, then check spark plug itself. If it is still acting up do a compression check on cylinder #3 to see if head gasket leaking.

If all that looks okay it may be the #3 fuel injector failure.

Read more: http://wiki.answers.com/Q/How_can_you_fix_PO303#ixzz1yD7OubjQ

Jun 19, 2012 | Cars & Trucks

1 Answer

I have a 2004 Jeep GC 6cyl 4WD. My check engine light is on, scanned and got P0203, P0300, P303. Changed the spark plugs, fuel injector #3. Started it up and ran rough, I left it in the garage all night...


codem p 0203 refers to injector 3---circuit malfunction===causes wiring--injector--ECM
chweck for harness connection , bad wire for no 3 injector or corroded pins for no 3 injector in the connection

May 14, 2017 | 2004 Jeep Grand Cherokee

1 Answer

'95 Toy 4-Runner Check Engine light and runs rough at idle


Older post...but, just in case you haven't found anything this is a great article.
http://www.off-road.com/toyota/tech/codes/index.html

Jun 01, 2009 | 1995 Toyota 4Runner

1 Answer

Engine runs rough in gear.


Okay disconnect battery for 3 min to reset engine light to turn off! change wire #2 to #3, Swap them then start it. if misfire happens again if your fault codes goes from po302 to po303 then your ignition wires should be changed!!! if it is the same the that side of coil might be at your point of interest to change but I think spark wires might do it!!!! spark plugs should be the same time!!!! I think this will help??

Sep 28, 2008 | 2000 Saturn Ls 4dr Sedan

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

192 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

75117 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

fordexpert

Level 3 Expert

5474 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...