[V8] Causes of bad MPG - Part III - the saga continues

Tim Hollister grey_wolf_x at yahoo.com
Mon Jan 15 16:38:43 EST 2007


I don't recall if you did or not, but the coolant temp sensor?
mine acted the same till the sensor failed completely and it wouldnt start at all cold.


--- Scott Phillips <Scottp at ippe.com> wrote:

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> Jason -- 
> 
> The car will start and run "fine" without the O2 sensor connected. The car however will not be
> able to determine if it is too rich/lean and make the adjustments to correct itself (that is
> what the O2 sensor does), So without O2 Sensor the car assumes it's to lean and will continue to
> richen the fuel, until it cannot anymore (full rich). This will get you. Really bad MPG, Lots of
> black smoke upon acceleration and possibly foul your plugs.
> 
> If it's starved for fuel, check the FPR vac line make sure  you have vac there and that the hose
> is not cracked or blocked.
> 
> HTH..
> 
> Scott '90 V8Q x2
> 
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