Help, Im getting terrible gas mileage. The only thing I did was change the intake with a BBK CAI. The car idles correct and there are no engine codes. Power is there with no hesitations or stalling. WTF could the problem be?
terrible gas mileage
- Thread starter 04COBRAinJapan
- Start date
what kind of gas mileage are you now getting??
about ten miles per gallon. i can let the car idle for about 15 mins and actually see the change in the gas needle.
The BBK CAI has a bend in front of the MAF that goes into the fender for "colder air" but this is a bad thing. You want a straight shot through the MAF because the bend will create turbulence and throw the reading off and this could possibly be your issue. Just a thought. GL.
I have a JLT CAI that goes into my fender. That was my first mod I did when I got my car that was completely stock. Right after that I drove to Birmingham Alabama for the MCA 40th Anniv. I was getting about 18mpg on the highway staying out of boost. So I dont understand why the CAI would make a difference. If anything it should get a little better gas mileage if you ask me. Is this the only thing done to your car?
I changed the clutch with a stock, but this should have no effect on gas mileage. The only thing that came off was the Hpipe, driveshaft and tranny. Is it possible i might need a tune?
I have NO idea what could have caused your gas mileage to drop off like that. Nothing you have listed should have caused this. You dont need a tune with just adding the CAI. After I added my CAI I had my car on the dyno & had the A/F checked & it was good. It was running a little rich on the top end of the RPM range, but was definitely nothing to worry about.
I'd say since it's something as simple as a CAI put the stock one back on and see if your gas mileage returns. If not I'd look into tune up type stuff like plugs, fuel filter etc.
My tuner told me the BBK made my GT run rich. Partly because of the bends, and smaller sized air filter. It's slightly smaller than the K&N. You might want to clean your MAF sensor, a new air filter can have a little too much oil on it, and when you run it, at first, it could contaminate the MAF.
Do a tune up: plugs, fuel filter, and clean out MAF/Filter if dirty!
03cobramanIII
Banned
i get 19.6 mpg all highway miles with 3.73s driving btween 2100 /2250 rpms or about 75 to 80 mph.
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