About 2 months ago, i installed a 180 degrees t-stat. After that, my gas milage droped drastically(i filled up 2 miles after installing it) i was getting aroun 25-28 mpg to work and back, and it dropped down to about 20.
I drove it around for a little over a month like this with no improvement. I drive 100 miles a day, 5 days a week and every mpg counts, so because of this, i wanted my milage back, so i dropped the 195 degrees t-stat back in. Its been a few weeks now and my milage is still stuck at around 20 mpg. I was wondering if anyone know what the cause could be. I've had a full tune up within the last 10,000 miles, cleaned the tb, maf sensor, and air filter recently, checked for vaccum leaks, and yeaterday i hooked up a scan tool
LTFT and STFT readings were both right around 0%, 02 sensors were cycling good, and spark knock was at 0, so at this point i'm am confused at what would cause the bad gas milage. I drive an average of 55mph with cc set and have not had a lead foot. I have written down all scan tool data so if anything else is needed i will post it
99 Bonneville SLE, panosonic CQ-C7203U HU, 760 watt Pioneer 2 channel amp bridged, 1200 watt 12In sony explode in a sealed box, sony explode 5.25 inch door speakers and sony explode 6x9'* in the rear deck, 1 farad cap, (125 dB) 83,000 miles, , apn upper intake and gm aluminum lower intake gaskits, silverstar ultra high and low beams, dynomax super turbo mufflar, dynomax high flow cat, gutted air-box, Astrostart Remote Starter
hella optics angel eyes with silverstar H3 bulbs
99 Arctic Cat ZR600, black magic pipe and can, 4000 rpm clutch, bored .30 over, 120+ hp..