[V8] The continuing saga of the check engine light (93 4.2)

[Tim Hollister]

that sound EXACTLY like mine about 2 weeks ago. replaced the o2 sensor, been fine every since.
mine was also smoking heavily when cold (bluish grey) that has also stopped. I wired in an o2
sensor for a 88 ford tarus 3.0.


--- Carter Johnson <carterjohnson3 at yahoo.com> wrote:

> So, after blindly assuming that the check engine light had something to do with the oil level,
> that appears to be more of a coincidence than anything else - a strange coincidence, but a
> coincidence none the less.  The light was back on in force today as milage once again plummeted
> into the teens despite a recent oil change and full level.  SOOOOOOO
>    
>   Off to the mechanic.  Checked the code - oxygen sensor regulator, and oxygen sensor out of
> maximum adjustment (or something to that effect...).  Mech thinks full pressure regulator
> sticking open, causing enrichment and oxygen sensor unable to cope.  Ok, intake comes off and
> waaaaalaaaaaaa - one of the problems - the return  fuel line is leaking (driver's back to
> passenger bank, the lower hose).  So we pull all that appart and test the fuel pressure - dead
> on 50.5lbs at idle, 58-59 at WOT.  Ok, so that's in spec.  Replace the line, and light goes off.
>  It's stayed off for the time being, but he's pretty sure that leaking line was NOT the cause of
> the CEL.  
>    
>   Stumped again.  Still thinking O2 sensor?  Why am I smelling raw fuel prior to the light
> coming on then, and the sensor is attempting to correct the problem?
>    
>   Carter
> 
> 
> W. Carter Johnson
> SileStone/Counterfitt of RI
> 401-789-3217 home
> 		
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