'91 X emissions and fuel pump relay questions | Ford Explorer Forums

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'91 X emissions and fuel pump relay questions

Tony H

Explorer Addict
Joined
September 4, 2003
Messages
1,595
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City, State
New York, Wading River (that's on Long Island)
Year, Model & Trim Level
'91 Eddie Bauer
HI folks. Have a new-to-me '91 Explorer.

as a maintence thing I would like to change out the original Fuel pump and main relays. I know they are under the Fuse block on the Passenger fender. I can't figure out how to get to the Relays below. Does the top Fuse area unsnap from the Relays below or do I take the to bolts off the fender? I didn't want to break any plastick so I'm asking.

Also.. Just had it inspected for the first time since owning it ( Sept 2nd I bought it) CO2 is horrible.

I know it could be a number of issues but is there a typical 'try it first' thing you guys would recommend. I'm not getting any Check Engine light and it runs very smooth.

O2 sensor? Is tyere 1 or more on the '91?
Hopefully not the Cat. Also the X seems to run very cold, barely hitting the 'N' in NORMAL. That might be part of it. The plugs look clean.

Any help would be appreciated
 






Found some answers

I found out how the Fuse and Relay panel snaps out last night.


Emissions is still an issue. It was running a bit cold 187 degrees so I replaced Thermostat. Hopefully that will help it not run in cold/rich mixture mode.

Still looking for any help or thoughts on high CO on my emissions test.
 






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