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88 ranger 2.9 idles rough


88ranger91

New Member
Joined
Oct 4, 2016
Messages
20
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0
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0
Location
Queen creek az
Vehicle Year
1988
Make / Model
Ford
Engine Size
2.9
Transmission
Automatic
Hi all,

The 88 ranger I just picked up is running a little rough. It's throwing codes 10r,41r,13r,77r,74r. I unplugged the o2 sensor and it seemed to idle a lot better.

I've looked for vacuum leaks, exhaust leaks, cleaned out the fuel system, and ran sea foam through the brake vacuum hose to try and clean the injectors. Running a lot better than it did when first bought it but still runs rough.

Any ideas on what to do next to fix the codes? Thanks!!!
 


88ranger91

New Member
Joined
Oct 4, 2016
Messages
20
Reaction score
0
Points
0
Location
Queen creek az
Vehicle Year
1988
Make / Model
Ford
Engine Size
2.9
Transmission
Automatic
Ok still new to this efi/computer stuff. I figured out the brake code and the "goose" test code but when in the test cycle do I press the brakes and move the throttle?
 

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