| Author |
Message |
    
Paul L
| | Posted on Sunday, March 24, 2002 - 08:54 pm: | 
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95 Disco-83 Kmi, 12k on the rotor, plugs, and wires...in the last 4 months, my mileage has gone from 14 or so mpg to 11 mpg with no change in anything. I use 93 octane, the truck runs like a kitten and the check engine light has never come on. I live in New England...could it be that "winter formulation" sh!t that passes for gas around here? |
Patrick Hartigan (Patrick)
| | Posted on Monday, March 25, 2002 - 09:29 am: |
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It might be your thermostat. |
Jon Williams (Jonw)
| | Posted on Monday, March 25, 2002 - 11:08 am: |
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...or your O2 sensors. They usually don't register a fault code on '95s unless they're completely broke and not sending any reference voltage to the ECU (ask how I know). Plus that's the kind of decrease in mileage you notice when they start to go. Winter gas affects mileage some, but not usually that drastically... |
Jake Hartley (Jake)
| | Posted on Monday, March 25, 2002 - 01:36 pm: |
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I agree, O2 sensors are most likely fading away. Same happened on my 94. It was gradual and never registered on the OBD. |
labonide
| | Posted on Monday, March 25, 2002 - 09:03 pm: |
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I heard it is quite easy to change the air mass sensors in case of a bad mileage problem.
are air mass flow sensors and O2 sensors the same thing?
Can someone explain me how to change it and where to get good second hand amf sensors?
Thanx for your help |
Leslie N. Bright (Leslie)
| | Posted on Monday, March 25, 2002 - 11:44 pm: |
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No, they're different.
The MAF is built into the tube between the air-filter box and the plenum. It measures the amount of air passing through for the ECU.
The O2 sensors are located on the exhaust, before and after the cats. They monitor the exhaust for the ECU.
I would check w/ Nathan for any of them.... I wouldn't use second-hand parts here.
-L |
Dudley Harris
| | Posted on Tuesday, March 26, 2002 - 12:42 am: |
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I recently had a bad MAF - once I replaced this I noticed a considerable difference in economy. You should be able to pick this fault up with an exhaust emission analyser. |
John in CA
| | Posted on Tuesday, March 26, 2002 - 06:44 pm: |
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Is changing the MAF sensor as simple as unplugging the old one and plugging in a new one? |
DaveB
| | Posted on Tuesday, March 26, 2002 - 07:09 pm: |
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While we are on the subject... My '98 D1 has been suffering on excelleration and gas mileage lately. Just not as zippy as it used to be and the gas gauge needle drops faster. I recently added an adventure rack with lights and thought that was doing in my milage in.
I'm starting to wonder if the MAF sensor might have something to do with it.
Any comments out there?
Dave |
Dudley Harris
| | Posted on Wednesday, March 27, 2002 - 03:47 am: |
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It is pretty simple.
On models with no Cat and no 02 sensors you need to adjust the pot to get the mixtures right.
02 sensors overide this setting for all other models.
There are different MAF sensors though - I know of a five wire (94 - mine) and a six wire. |
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