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Old 07-17-2017, 12:01 PM   #1 (permalink)
t vago
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Join Date: Oct 2010
Location: Cedar Rapids, IA
Posts: 1,766

The Karen-Mobile - '05 Dodge Magnum SXT
Team Dodge
90 day: 26.72 mpg (US)

Fiat Dakota - '00 Dodge Dakota SLT RWD Quad Cab
90 day: 16.67 mpg (US)

The Red Sled - '01 Dodge Durango SLT 4WD
90 day: 16.96 mpg (US)
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Fuel injector change for FE...

Yesterday, I changed out the fuel injectors on the Karen-Mobile. The old injectors were of the 4-hole variety,and were likely the original injectors that have about 235K miles on them. The new ones were more of the 12-hole injectors of the type I already installed into my wife's Durango. Both have the same rated flow rate of 24.0 lbs/hr.

It's certainly possible that my old injectors were misbalanced and dirty to the point where they'd negatively impact fuel economy, so I am not ruling that out, but...

Normally, on my 19 mile drive into work, I would reliably get anywhere between 24.8 and 25.3 MPG. Nice, steady-state conditions (at least once I get out of the Cedar Rapids city limits, anyhow), little traffic, and weather conditions this time of year appear to be fairly steady.

I got 28.2 MPG this morning, with the new injectors. That's a 12.8% increase in fuel economy.


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