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- - 5 MPG Drop (https://blazerforum.com/forum/engine-transmission-35/5-mpg-drop-16578/)

wpruittsr700

01-23-2008 08:39 PM

5 MPG Drop

I just changed all my plugs except for the #3 because I didn't have the tools to get to it. (I plan on getting the tools friday) I noticed that I was getting really bad gas miles and when I checked it i went from 16 MPG to 11.5 MPG. Could that one plug make that much of a diference? Any suggestions? I used bosh platnum 2 they didn't need to be gaped

ltown21

01-23-2008 09:12 PM

RE: 5 MPG Drop

what did you set the gap at for the plugs?

swartlkk

01-24-2008 08:06 AM

RE: 5 MPG Drop

Plugs shouldn't make your mileage drop even if you left one old plug in. I would check over all of your work. As well as check the gap of the plugs.

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