boost mileage on 84 5.0? July 30, 2008, 11:21:27 AM i got my 84 cat with the big daddy in it! any tricks to better millage??? im figureing to getting 10 MPG!!!!!!!!!!!! Quote Selected
boost mileage on 84 5.0? Reply #1 – July 30, 2008, 12:12:26 PM start with a good tune up and oil change. then just take her easy. we all know how under powered the 84 cfi 5.0's are. Quote Selected
boost mileage on 84 5.0? Reply #2 – July 30, 2008, 12:18:08 PM lol i just put race oil and new K&N oil filter , new plugs a while back, need wires, cap and rotor? but still 10mpgs!??!?!! Quote Selected
boost mileage on 84 5.0? Reply #3 – July 30, 2008, 12:39:42 PM If you're only getting 10mpg and it's mostly stock and been "tuned" up, then there's something wrong. No "tricks" are going to improve mileage if the car is not running right. Either that or you're just driving like an idiot the entire time... Quote Selected
boost mileage on 84 5.0? Reply #4 – July 30, 2008, 01:51:41 PM I used to drive my '85 t-bird like an idiot back when it had stock gears and regular skinny tires and I STILL did better than 10 mpg... Quote Selected
boost mileage on 84 5.0? Reply #5 – July 30, 2008, 01:53:08 PM yeah i hear they get like 17-18mpg idiotic driving? Quote Selected
boost mileage on 84 5.0? Reply #6 – July 30, 2008, 01:58:14 PM Computer codes?EGR valve cleaned?IAC working?O2 sensors replaced?ACT and temp sensors checked?You have a LOT of homework to do.How many miles are on the car? Quote Selected
boost mileage on 84 5.0? Reply #7 – July 30, 2008, 02:16:38 PM 14XXXX?? maybe maybe 24XXXX??? Quote Selected
boost mileage on 84 5.0? Reply #8 – July 30, 2008, 03:58:39 PM Does the transmission shift up through all the gears? Quote Selected
boost mileage on 84 5.0? Reply #10 – July 30, 2008, 06:17:53 PM I got 24mpg highway out of my 83 5.0 Cougar. It ran like a top. Something is wrong with your car. I get 26mpg out of my 88 Cougar 5.0 and it has things to be done to it yet that will help with that.You are getting way too much fuel,cannot utilize the fuel you have or air is not getting in/out. Quote Selected
boost mileage on 84 5.0? Reply #11 – July 31, 2008, 12:02:21 PM not sure probably should get a new O2 sensor? Quote Selected
boost mileage on 84 5.0? Reply #12 – July 31, 2008, 11:13:25 PM run codes. O2's are expensive, especially if you buy them for no reason. Quote Selected
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