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Changing the computer in a 1998 explorer

When changing the computer in a 1998 explorer built in Aug. How do I get the key to match the computer?

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Has to be done with the ford scan tool

Posted on Jul 14, 2009


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Did you check the fuel pump relay ? The relay gets power from a fuse and also from the PCM relay. The computer grounds the relay to turn it on for 3 seconds when you turn the key on, then only after the computer "sees" RPM or oil pressure.

Feb 05, 2014 | 1997 Ford Explorer AWD

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Where will I find the ignition cylinder tamper switch on a 98 lincoln town car

Its just about impossible to bypass. You would need a key that matches the old key chip cut to the new tumblers. Each key has a chip in it that the computer looks for.

Jan 25, 2014 | 1998 Lincoln Town Car

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Changed ecm on 1998 ford explorer and now wont start

you may need a software update as the key needs to link to it,.

Dec 28, 2013 | 1998 Ford Explorer

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Trans leak from dip sick

Could be damage from jacking vehicle to change tires. Sometimes lift kits are installed to match oversize tires and clearance might be messed up by putting on smaller tires. Any chance dipstick was already leaking?

Jul 08, 2013 | 1998 Ford Explorer

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How do i bypass security system

if you had a new ignition switch installed it needs built to the old key or reprogram the key to the new ignition switch

Mar 23, 2013 | 1998 Ford Explorer

1 Answer

1998 ford explorer alarm will not let car start door locks not working

The Security system will activate if the Battery is below standards. Have the battery checked. Even if you jump start it, as soon as the jumpers are removed the charging system may not work or the engine may die.

If you have another ignition key, try that. The ignition key has a Code in it and if it does not match the Codereader, it will not start.

Aug 27, 2012 | 1998 Ford Explorer

1 Answer

Howto change a key cylinder for a chevy cobalt

There is a TSB on this issues if your having ignition lock issues.
Service Information
2009 Chevrolet Cobalt | Cobalt, G5 (VIN A) Service Manual | View All Bulletins | Document ID: 2325129

#09-02-35-005: Ignition Key Difficult to Remove, Ignition Key Binds or Sticks in Cylinder (Replace Ignition Cylinder) - (Aug 10, 2009)

Subject: Ignition Key Difficult to Remove, Ignition Key Binds or Sticks in Cylinder (Replace Ignition Cylinder)

Models: 2008-2009 Cadillac CTS (Built Prior to VIN Breakpoint 90163371)

2005-2009 Chevrolet Cobalt (Built Prior to April 14, 2009)

2006-2009 Chevrolet HHR (Built Prior to April 14, 2009)

2007-2009 Chevrolet Equinox (Built Prior to July 2008)

2005-2006 Pontiac Pursuit (Canada Only)

2006-2009 Pontiac Solstice (Built Prior to April 14, 2009)

2007-2009 Pontiac G5 (Built Prior to April 14, 2009), Torrent (Built Prior to July 2008)

Attention: This bulletin only applies to vehicle equipped with automatic transmission.

Aug 05, 2010 | 2005 Chevrolet Cobalt

1 Answer

Does 98 ford explorer has a microchip in the key

Yes it does have a microchip did they replace it with the right key switch and try unplugging the negative battery cable for about a minute to reset the computer

Aug 01, 2009 | 1998 Ford Explorer

1 Answer

Anti_Theft System

I am not quite sure what you are trying to do. The anti theft is always engaged as there is chip in the key that must match in order for the vehicle to start. What do you want to accomplish?

Jan 06, 2009 | 1998 Ford Explorer

1 Answer

Security problem

Can you please tell me what part was replaced on you ignition system.
If you have changed the ECU or the IGN key switch they need to be fitted in matched pairs as the key switch is match coded to the ECU
Unless you purchase a brand new one that will be blank but must be coded by the dealer or someone with the correct software.

Inside the key is a small chip that tells the ECU it is a match & lets the car start.
The mechanics of most key switchs can be replaced but you must put the chip from your old key into the newly fitted key.
Some cars like Mercedes have the key switch coded & the key so they talk to each other & they must also be coded to the ECU as well.
Nothings ever simple is it.

Jul 21, 2008 | 1998 Oldsmobile Achieva

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