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Thread: Drop in MPG's

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crager34 Drop in MPG's 01/22/2011, 09:53 PM
Cris Same thing happened to me. If... 01/23/2011, 04:09 AM
vt_maverick Can't you find a mechanic who... 01/23/2011, 10:52 AM
Ldub I'd guess winter blend fuel... 01/23/2011, 12:21 PM
Gussie2000 I agree with larry. Winter... 01/23/2011, 02:38 PM
Jolly Roger VX\'er I get 60 miles "easily" on... 01/23/2011, 03:29 PM
MSHardeman Did you have to remove the... 01/23/2011, 10:04 PM
tom4bren Crager, Didn't you move at... 01/24/2011, 02:18 AM
crager34 Did not remove the rotors. ... 01/25/2011, 08:43 AM
tom4bren They have meds now for... 01/25/2011, 08:53 AM
Ldub FWIW...:_confused I... 02/14/2011, 07:00 PM
nfpgasmask That was my initial thought... 01/25/2011, 02:57 PM
blacksambo Lucas gas treatment also... 01/27/2011, 01:13 PM
Mile High VX I use it with every... 01/27/2011, 03:40 PM
Junster Cold is really hard on 02... 02/13/2011, 08:54 PM
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  1. #1
    Member Since
    Feb 2011
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    2000 Dragon #0274
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    Cold is really hard on 02 sensors. They need to be hot to work right. If they don't send the right mixture info quick enough the ecu will go to a open loop and ignore it. The mix will be like a carb thats got a stuck choke. This would explain the EGR problems many seem to be having. Running rich clogs the EGR. Also extended "warming up" will. Do these motors have a 1 wire or a 3-4 wire 02? The one that's on the engine side of the catalytic converter. The one aft just reads how the cat is doing. OBD2 vehicles always have at least 2. 1 wire 02's depend on exhaust gas temp alone to warm them. 3 wire 02's have a heating element in them, 4 wires the extra wire is a extra ground for the sensor cause exhaust hangers are rubber and sometimes the exhaust pipe itself has a very poor ground. If it's a 1 wire and replacing it doesn't help try wrapping the exhaust with header wrap about 6-8 inches above and below the 02 sensor. One more thing, did you accidently unplug your 02 when doing the axles? If you replace a 02 disconnect the battery. They can be sensitive and they are expensive.
    Last edited by Junster : 02/13/2011 at 08:59 PM
    Junster If it don't looked fixed.. It ain't fixed.

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