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Old 11-03-2005, 03:08 AM #1
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Sudden Weird Drop in Gas Mileage...Ideas?
I have an 02' 4x4 and things have been fine forever. I did my 60K service in July and that was fine. I have been getting the usual 16-17 in town and maybe 19-21 on the Highway. Now I am getting 12ish in town. Tires are inflated right. Everything checks out, but I will say this. I have a remote start and for the last 3 weeks or so it doesn't fire on the first try. So when I do turn it over again after that, it hesitates likes it was flooded , then revs. Do you think i could have fouled a plug(s) and how can I tell? Do I need to reset some ECU or something? I don't know what the deal is. No leakes either. Thanks......B
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Old 11-03-2005, 09:31 AM #2
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At the 60 k mile check-up the spark plugs should have been changed. I would pull a plug and inspect it. That way, you will know if that was done and also know if they are fouling.

Don
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Old 11-03-2005, 09:44 AM #3
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Change Spark Plugs.
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Old 11-03-2005, 12:29 PM #4
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I put new ones in at 60K..What does a fouled plug look like?
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Old 11-03-2005, 01:51 PM #5
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check the gap spacing on the plugs.

or the other thing to look might be the cables as one might have popped off.
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Old 11-03-2005, 02:10 PM #6
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i have an 02 4x4 and im getting 12.6 around town, sure i dont have the right gears in it and my tires are really low on air pressure...

let me know what it is so i can check mine out


good luck
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Old 11-03-2005, 05:30 PM #7
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Well i don't think it's a cable because wouldn't the motor be shaking a lot if 1 piston wasn't firing? And I know that the gaps are dead on. What about the MAF....or any other sensors? Any maintenece that I need to do there?
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Old 11-03-2005, 08:41 PM #8
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If one of the cylinder is not firing, the engine should shake a little but less so on a V8, My guess is something to do with the intake or emission system.
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Old 11-04-2005, 04:42 PM #9
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Clean the MAF

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Old 11-04-2005, 07:55 PM #10
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Wht about resetting the ECU? So it can learn the gas mileage trend again? You know what I am talking about.
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Old 11-05-2005, 08:36 AM #11
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Quote:
Originally posted by mikes4runner
Clean the MAF

Mike
Oh yea, clean MAF as Mile has stated.
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