sudden drop in gas mileage

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Apr 18, 2009 | 03:39 AM

#11

RonJ

Recognized HCF Member

Joined: Sep 2007

Posts: 9,453

From: Houston, Texas

Quote:

Originally Posted by kfish

...It does come on for a second with the others, but not other than that.

Quote:

Originally Posted by itinerant

...Your CEL bulb is burned out or has been removed, so it could be throwing codes and you'd never know. I'd recommend replacing the bulb while you're at it.

I think the CEL is fine.

Apr 18, 2009 | 04:18 AM

#12

WellFedHobo

Moderator

Joined: Jul 2007

Posts: 4,961

From: Arkansucks

RonJ's right. I missed a post while I was checking HCF from my phone...

Apr 18, 2009 | 07:47 AM

#13

mk378

Recognized HCF Member

Joined: Jun 2007

Posts: 10,023

Baker has a good point about the possibility of overcooling because of a bad thermostat. If that were the case, you would see that the temperature gauge on the dash always stays at or near cold instead of coming up to the normal reading of about halfway up.

And do check that spark timing because being even a little off on the timing will kill your gas mileage with no other symptoms other than less horsepower as well.