Quote:
Originally Posted by phantasticity
My FRS is basically stock, all I have is an Exhaust, Intake, but sometimes I feels like my car has gained more than 10 hp, but sometimes I feel like I've lost 10 hp. Like it's different every other day. Would a tune help with this situation?
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California, so you only have 91 fuel, and some of that can be rearly bad.
maybe try the better brands of fuel, the car needs 93 to produce best horsepower.
On 91 the car will get a bit of knock and the ecu will retard timing to protect engine. If you lugg the car arround in the 2000-3500 area a lot it will knock a lot in that area and ecu will retard timing a lot making the car sluggish especially on warmer days.
If you drive the car on some open backroads where you can rev it through the gears a bit more above 4000 or so you will find the ecu will return a bit of that timing and car will feel better for a while till its luged arround in traffic again.
fix is good fuel.