Question about 1998 Ford Expedition

1 Answer

98 expedition computer problem

I went to emissions and they said the computer was not ready. I drove it for about 2k miles to try and cycle it but it didnt work. I

Posted by on

  • 3 more comments 
  • big_bob_bear Apr 24, 2009

    print out says not ready. Usually when this happens you need to drive the vehicle to reset the computer but I drove it about 2k and still the same. I drive it about 20 miles to emission test so it is at operating temp. Here in az its so hot you dont even have to run it to be at operating temp.

  • big_bob_bear Apr 30, 2009

    It is not failing the test its not even acknowleding that anything is hooked up.

  • gerry bissi May 11, 2010

    try disconnecting the battery for about 1/2 hour. This should cleqr codes and reset your computer. Truck will run rugh for about 10 miles while computer relearns your engine and sensors. report back on success.

  • gerry bissi May 11, 2010

    when it reaches operating temp, it should be ready

  • david doerfer May 11, 2010

    not ready for what???



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 73 Answers

Then you have a bad thermostat and the computer cant pass the test when it doesnt reach operating temp it cant go in to closed loop where it burns the fuel more efficient

Posted on Apr 26, 2009

  • david doerfer May 02, 2009

    will the computer talk with a scanner that is hooked up to the diagnostic connecter?



1 Suggested Answer

  • 2 Answers

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

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.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

2 Answers

Evap system problem

go to a better mechanic as he would know that resetting is done with the scan tool

May 31, 2017 | 2004 Acura RSX

1 Answer

My 2002 Camry LE showed not ready for emissions test What is drive cycle to reset computer?

drive cycle is you need to drive it between 30-60 miles to make sure your computer relearns all the emissions sensors and then you can get it inspected

Feb 20, 2013 | 2001 Toyota Camry

1 Answer

What's your problem? emissions not ready

****** your timing so it barely runs and have it tested again, i had to do this on a built motor i had in a pickup a while ago and it worked then. not sure if the testing standards have changed alot since but its an idea.

Mar 19, 2012 | 1998 Chevrolet S-10 Pickup

1 Answer

Had to jump start, when tried to get emission insp I was told it would have to go through drive cycle to pass what is this

Cars do have a drive cycle to clear up a fault. It more less ensures the issue has been corrected after a certain drive cycle. Some issues have to cycled for 500 miles.

Jan 05, 2012 | 2001 GMC Jimmy

2 Answers

When resetting computer for emissions how many miles to put on drive cycle

it is not the miles driven but the type of drivng, it must be a mixture of highway sppeds, stop and go and idle time, this in most cases takes anywhere from 20-100 miles for most drivers. go to the link below for a complete discription of the drive cycle and what u must do.

May 27, 2010 | 1997 Ford Expedition

2 Answers

On-board computer not ready for emission inspection 02 ford taurus. replaced battery 1 month ago

This is the biggest flaw in emissions testing. It takes 4 tanks of fuel and 1000 miles of wasteful driving to reset the computer on the FORD TAURUS (I've got a 2000). So much for pollution control!

Sep 14, 2009 | 2002 Ford Taurus

2 Answers

Toyota camry 2001emission not ready (Readiness == Fail )

The P0420 code, usually associated with a weak cat converter, is in fact often caused by an ageing (weak) downstream O2 sensor. On both my cars at around 150K miles replacing the downstream O2 sensor was all that was needed to clear the code. No cat replacement was necessary. If one actually spends some time reading the diagnostics procedure for this code, they will find that the O2 sensor diagnostic is the first thing to do before replacing the cat converter. The downstream sensor, the one after the cat converter, gets "lazy" with age. This means that it no longer produces voltage signals as it used to. The result is that the voltage swings that come out of it begins to follow very closely the voltage that is generated by the upstream O2 sensor. When this happens, the car computer thinks the cat converter does not do its job (which might as well be the case too, but the O2 sensor is the first thing to try). With a code scanner with live data stream you can see the voltages coming from the O2 sensors. Check-out my write-up on the 2002 Toyota Prius cat converter replacement on
- I got some details there. And see my comment for Dennis above here too

Nov 10, 2008 | 2001 Toyota Camry

1 Answer

Arizona vehicle emission test

is your check engine light on? if not you can bring it back in to see if the monitors are ready yet, the only thing you can do is drive it until its ready or the CEL comes on good luck and please rate -jeff

Aug 15, 2008 | 1998 Honda Civic

Not finding what you are looking for?
1998 Ford Expedition Logo

Related Topics:

205 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts


Level 3 Expert

76630 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers


Level 3 Expert

5537 Answers

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

Answer questions

Manuals & User Guides