I have a 2011 Mazda 3s 2.5cylinder 6 speed manual. I think my problem is the tps sensor. When I am going down the road at regular speed I will push the throttle to the floor and my rpm's will climb 500-1000 rpm and then come back down after that it will start to gain speed. My gas mileage went from 26 mpg to 17 so it was cut by more than half and it doesn't have the power that it use to. Like I said I think it's the tps but before I bought the part I wanted to get any opinions on it.

 

Sounds more like a dead clutch than anything else.

 

that's what I thought at first too but I can downshift all day and not once has it slipped or anything.

 

Down shifting isn't the issue, if your RPMs change without touching the clutch pedal, and without any noticeable change in speed, then you have a dead clutch.

 

Well that sucks, it's $500 for a new clutch

 

Try a early upshift and floor it. Example, make a 2-4 shift where you would normally do your 2-3 shift. Put some fuel to the motor and you'll be able to tell if the clutch is grabbing like it should, or if the RPM's wind up with no road speed increase. You can also try engaging the clutch from a stop slightly quicker than you normally do. Slips will show up this way too.

With Mazda's redundant throttle, if one of the TP sensors were bad, the check engine light would pop on and put the vehicle in 'Limp" mode. Just enough power to get you off the road safely.

 

I did the stop light idea and it spun my tires. I found one of my hoses on my intake loose so I tightened it and now it doesn't do it as bad.

 

I would recommend a diagnostic code check.