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Discussion Starter #1
Anyone have any advice? The check engine light flashing reveals "always running rich". I've replaced the plugs, rotor, cap, fuel filter, & o2 sensor. Some parts because it was just time to do it. Damn light still keeps coming on. Help!

Thanks!

Dave
1993 EB 161,xxx. minimally modified.
 

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What engine is it. Some broncos have more that 1 o2 sensor also. Please fill out your sig line with your stats.

Welcome to FSB :drinkbud
 

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Discussion Starter #3
94bronco said:
What engine is it. Some broncos have more that 1 o2 sensor also. Please fill out your sig line with your stats.

Welcome to FSB :drinkbud
Only saw the one o2 sensor.
 

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when you changed all those things... did you have the battery disconnected??? In EEC-IV environment, that should clear the codes from the computer memory... I would suggest getting the $35 engine code reader from about any decent autoparts store. They work great, as long as you don't have some moron doing his lawn 20 feet away while you're doing it... LOL... ;) Long story... LOL... Anyway... you may have residual codes in the EEC memory.... disconnect the battery, turn the key to the on/run position... let stand for about 15 - 20 minutes... turn key to off position... reconnect battery... run diagnostics... and watch check engine light activity...

the more things change, the more they stay the same...
 

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Discussion Starter #5
Tomh971 said:
when you changed all those things... did you have the battery disconnected??? In EEC-IV environment, that should clear the codes from the computer memory... I would suggest getting the $35 engine code reader from about any decent autoparts store. They work great, as long as you don't have some moron doing his lawn 20 feet away while you're doing it... LOL... ;) Long story... LOL... Anyway... you may have residual codes in the EEC memory.... disconnect the battery, turn the key to the on/run position... let stand for about 15 - 20 minutes... turn key to off position... reconnect battery... run diagnostics... and watch check engine light activity...

the more things change, the more they stay the same...
Yes, I did clear out all the codes. Still keeps showing the same thing. Could it be the cat convertor?
 

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:goodfinge Pull the bulb out and sell it! :goodfinge
 

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Um, not that I don't trust people (but I don't :D )
Please give people the actual code number, not just what you read it ment somewhere. People that might be able to help you, could have large resorces to get longer explanaiton of that code. I assume it was a 42 maybe :shrug
 

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Discussion Starter #8
Fireguy50 said:
Um, not that I don't trust people (but I don't :D )
Please give people the actual code number, not just what you read it ment somewhere. People that might be able to help you, could have large resorces to get longer explanaiton of that code. I assume it was a 42 maybe :shrug
The code # is 173, I read the Ford Fuel injection web page for explanation.
 

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Possible causes:

--Fuel Pressure
--Fuel injectors (Run engine at idle. Disconnect 1 injector at a time: Note rpm drop for each injector. same? )
--HO2S.
--Secondary Air Injection (AIR) system.
--PCV/Hose.
--Vacuum.
--CANP.
--MAP sensor.
--Electronic Ignition Coil Failure.
 

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v8one said:
Yes, I did clear out all the codes. Still keeps showing the same thing. Could it be the cat convertor?
yes...
 

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I use to have a "check engine" light problem. Mine was the result of a loose MAP sensor. Check the sensor on the intake hose to the fuel injectors and make sure it's plugged in tight.
 

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Discussion Starter #12
Edie Boomer said:
I use to have a "check engine" light problem. Mine was the result of a loose MAP sensor. Check the sensor on the intake hose to the fuel injectors and make sure it's plugged in tight.
Everything's tight on the MAP.
 
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