Good to hear its improving. The regulator might be an issue too but the
O2 was probably most of the problem.
Let us know the result.
Bill Mote wrote:
> Installed new O2 sensor and the situation improved. Checked the fuel
> pressure and found at all times the pressure was greater than the
> specification. Have new regulator on order.
>
> "Bill Mote" <bandjrest@[EMAIL PROTECTED]
> wrote in message
> news:X3Ixj.678618$kj1.85387@[EMAIL PROTECTED]
>
>> Ordered the O2 sensor today, should be in tomorrow. Thanks for the
help.
>> will keep you posted
>> "TonyJ" <"tonyjnospam at nospam visi.com"> wrote in message
>> news:13se3bn4kejehe5@[EMAIL PROTECTED]
>>
>>> I talked with a friend who has a lot of recent experience with these
and
>>> his thoughts are (in this order of importance):
>>>
>>> - O2 sensor is covered with carbon due to running rich. The only
reason
>>> that the O2 would throw an error code is if its internal heating
element
>>> is bad.
>>>
>>> - Normal tune-up issues - Caps, rotors, wires and plugs
>>>
>>> - Log the fuel pressure over a low and high mileage cycle to find if
the
>>> fuel pressure regulator is on the way out.
>>>
>>> Me. I bet on the O2 sensor.
>>>
>>> Let us know what you find.
>>>
>>> Bill Mote wrote:
>>>
>>>> The return and supply line are in good condition with no signs of
rust.
>>>> The V8 has full electronic injection - Motronic. I will look for the
>>>> multifunction plug and check for corrosion. Engine temp both oil and
>>>> water are right on normal. Other than the injection system running
full
>>>> rich, all seems normal.
>>>> "TonyJ" <"tonyjnospam at nospam visi.com"> wrote in message
>>>> news:13sckfj12123515@[EMAIL PROTECTED]
>>>>
>>>>
>>>>> The T44 series had a problem with leaks in the steel gas lines that
run
>>>>> under the car on the passenger side. The problem is that the plastic
>>>>> clips that hold it to the underside of the car hold moisture and
cause
>>>>> rust.
>>>>>
>>>>> If you smell fuel when walking by the right side of the car in a
closed
>>>>> area with no wind, that may be something to check.
>>>>>
>>>>> Does the V8 have CIS or fully electronic injection. I am more
familiar
>>>>> with the CIS from the I5s.
>>>>>
>>>>> I seem to remember that the V8 has an electronic multi-function plug
>>>>> somewhere on the top of the engine, possibly in the front. When
these
>>>>> get wet or corroded they cause a number of problems.
>>>>>
>>>>> Is the engine temperature running at the normal level?
>>>>>
>>>>> Bill Mote wrote:
>>>>>
>>>>>
>>>>>> I run Techron about every 10th tank or so. I should add that this
>>>>>> issue occurred very suddenly, and is also intermittent. I can be
>>>>>> driving at 70 mph show 12 - 14 mpg on the level and then suddenly
the
>>>>>> mileage jumps up to 21 -22 mpg. Overall average for the past 200
>>>>>> miles has been in the 11 - 12 mpg range, prior to that it was
always
>>>>>> in the 21 - 24 mpg avg. for freeway speeds.
>>>>>> "TonyJ" <tonyj@[EMAIL PROTECTED]
> wrote in message
>>>>>> news:13sbul2liecaqbd@[EMAIL PROTECTED]
>>>>>>
>>>>>>
>>>>>>
>>>>>>> Bill Mote wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> The fuel economy on my car has gone approximately in half. Went
from
>>>>>>>> around 22 mpg at 70 mph to around 10 to 11. I replaced the temp
>>>>>>>> sensor, checked the mass air flow sensor, checked the idle speed
>>>>>>>> motor? and have cleaned the throttle body. Also replaced the air
>>>>>>>> filter all to no avail. No codes in computer.
>>>>>>>> What am I missing??
>>>>>>>>
>>>>>>>> Many thanks
>>>>>>>> Bill
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> Winter fuel blends.
>>>>>>>
>>>>>>> May have dirty injectors with poor spray pattern. Try some Techron
>>>>>>> injector cleaner.
>>>>>>>
>>>>>>>
>>>>>>
>>>>
>>>>
>>
>
>
>
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