Question about 1999 Ford Expedition

2 Answers

Check engine light flashes on 99 Ford Expedition, hooked it up to computer and says plug # 3 is bad, I replaced it but the light is still on

Posted by on

Ad

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

Try changing the #3 cylinder spark plug wire or all wires as you probabley have to buy them in a set.

Posted on Sep 10, 2009

Ad
  • 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.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 376 Answers

The 99 expedition with the v8, has many times had bad coil. there is a coil above every spark plug, remove the coils harness and two 8mm bolts and then it should lift off the plug. I would start there.

Posted on Sep 11, 2009

Ad

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:

1 Answer

1999 ford expedition engine misfire at low speed and deceleration have replaced bad coil over plug asembly


Is the check engine light flashing? Have you determined the cylinder is getting fuel and the injector is ok? Does the cylinder have good compression? Is there any intake vacuum leak? Are any other fault codes present when you run a fault code test?

Sep 23, 2016 | 1999 Ford Expedition

1 Answer

Triton 5 4 v8 engine diagram


Have you checked the plugs and the rest of the ignition system ?
What are the trouble codes stored in the computer ?

May 30, 2013 | Cars & Trucks

1 Answer

2005 expedition engine vibrating badly with flashing dashboard what could this be?


If the check engine light is flashing, there is a serious problem that is affecting the performance of the engine.
You need to get the computer scanned for trouble codes to proceed.

Feb 13, 2013 | 2005 Ford Expedition

1 Answer

My check engine light came on yesterday, took my 99 expedition to parts store,code read misfire plug#3? How to fix?


Depend on mileage on them. Personally I don't run plugs more than about 50-60K regardless of what the owner's manual says.

Pull plug three and see what it looks like: fouled (dark oily residue, bent electrode, etc. If electrodes seem worn from use and mileage, replace plug--you'll see scooped out area on outer electrode if excessively worn, clear code and see it it runs ok. If it codes again it could be a bad plug lead as well. If code returns then check out lead to plug or replace it. Plug 3 will be on the left bank of the engine third one from the front. Plug order is:

Back

4 8
3 7
2 6
1 5

Front

Firing order 1-3-7-2-6-5-4-8

Feb 21, 2012 | 1999 Ford Expedition

1 Answer

97 Ford expedition check engine light flashing, truck running rough.


A flashing CEL means that you might be causing damage to your CATs. It will flash when the PCM senses a misfire bad enough to cause fuel to dump into the exhaust. When that happens lay off the throttle. Chances are you've got a bad injector or bad plug.

Use a code reader to know the real reason that check engine light come on.

Apr 30, 2011 | Ford Expedition Cars & Trucks

1 Answer

97 Ford expedition blinking check engine light, running rough.


A flashing CEL means that you might be causing damage to your CATs. It will flash when the PCM senses a misfire bad enough to cause fuel to dump into the exhaust. When that happens lay off the throttle. Chances are you've got a bad injector or bad plug.

Use a code reader to know the real reason that check engine light come on.

Apr 30, 2011 | 1997 Ford Expedition

2 Answers

Have replaced battery, starter, solenoid - now 3 weeks later it won't start again. my odometer flashes on and off - could this be my computer going bad?


Check for something draining the battery. It could be something like a switch on an under bonnet light or boot light sticking

Jan 30, 2010 | 1999 Ford Expedition

2 Answers

My 99 ford expedition 5.4 is running bad and it sputtering and shaking while driving?


you probably got a bad coil. The 99 5.4 has individual coils one could be misfiring, but you will have to hook it up to a computer.

Oct 07, 2009 | 1999 Ford Expedition

1 Answer

1999 Ford Expedition XLT will not start


My ford expedition 99 has service engine soon light on. Hooked up to ODB and the equipment showed nothing; no power; checked on different car worked fine. what is cause. Equipment has worked on another ford expedition before by the way.

Jul 30, 2009 | 1999 Ford Expedition

2 Answers

I have a code po354 on my 99 expedition, book says cylinder d misfire, which cylinder is this?


I just worked on 98 expedition 5.4l had code PO354. This code refer to an open primary coil winding, open wire, or bad PCM.
Check primary winding with ohm meter should be from 0.5 to 1.5 ohms and about 2.5 ohms with a hot engine. check wiring with a noid light, run the engine and shake the harness if light goes out repair harness you should have battery voltage with key on the computer controls the ground side.

Jun 22, 2009 | 1998 Ford Expedition

Not finding what you are looking for?
1999 Ford Expedition Logo

412 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

76132 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

fordexpert

Level 3 Expert

5520 Answers

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

Answer questions

Manuals & User Guides

Loading...