99 Sable ???'s

[RustedRanger]

My mom has a 99 Sable 3.0L and it has started running rich. It has 256K on it but the motor runs really good but it has started running rich when she starts it up. Are the systems for the engine control anything like what's on my 87 Ranger?

 

[whocares]

When was the last time the 02 sensors were replaced?

 

[RustedRanger]

I would guess....never lol. It seems to run rich (gas smell) when it's first started. The computer doesn't use info from the O2 sensor until it warms up....correct?

 

[ozziemo27]

Codes?

 

[adsm08]

Are the systems for the engine control anything like what's on my 87 Ranger?

Similar, but more advanced.

I would guess....never lol. It seems to run rich (gas smell) when it's first started. The computer doesn't use info from the O2 sensor until it warms up....correct?

The computer will use info from the O2s before it gets fully warm, but it will run in open loop for about 30 seconds to a minute. If you are only getting the fuel smell at start up it may be time for plugs, wires, and coil. It may also be the cats starting to fail. They do wear out after a while, and they work much better warm than cold. They reach peak efficiency above 400* F.

 

[RustedRanger]

I don't know how to pull codes other than going to the parts store,check engine light has been on for years and the shop she used couldnt find a problem. I was thinking plugs next but it will have to wait till after the 1st. Thanks y'all.