"97 5.4L troubles

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Aug 13, 2008 | 08:59 AM

#16

Johnny Langton

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Joined: Oct 2006

Posts: 4,171

Likes: 12

From: SE Texas

Quote:

Originally Posted by krewat

I've heard that the Bosch O2 sensors do not react as quickly as the Ford sensors. People have actually watched them with scan tools and saw the difference.

Maybe you can find Motorcraft brand sensors somewhere?

Correct- the replacement Bosch sensors that you buy at Autozone,etc are just...well,garbage.
JL

Aug 13, 2008 | 09:51 AM

#17

projectSHO89

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Joined: Jan 2004

Posts: 19,762

Likes: 1,079

From: St Louis

Quote:

Originally Posted by krewat

You need to do a few drive cycles before it'll clear on it's own. Better to disconnect the battery overnight ...

Could be wiring, for sure...

There's no need to disconnect the battery. If you do, you'll have to re-program your radio and your clock.

Simplest on a 97 or 98 is to locate that little fuse box back in the corner under the driver's side hood hinge and remove the small value fuse (5A, IIRC) for 10-15 minutes while the key is OFF.

This removes the keep-alive power from the computer only and it will reset to manufacturer's defaults. Observe the note in your owner's manual regarding drivability after disconnecting or replacing a battery.

Steve