BMW tps only reading 0 to 2volts in ems
#1
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BMW tps only reading 0 to 2volts in ems
I wired up a BMW Bosch TPS, which should give me 0 to 5 volts but it only shows up as 0 to 2 volts on the EMS. I want to tune it based on TPS instead of MAP, but 2 volts doesn't give me enough resolution. Accel bounces around too much at steady throttle. Any ideas anyone?
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Because non-tps based tuning sucks? OP, if you have 5 volts before the sensor and its wired correctly then it might be broken? Have you checked to make sure its supposed to output more than 5v? I haven't checked mine in a while so I don't remember.
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Thank you for the replies, I appreciate it. After playing around with the tps for a while, we (he) retuned it off map and its actually really good now. Power was always good, just driveability was a little off, and I guess I am picky. The true test will be when my wife drives it to work.
The 5v versus 2v still bugs me though.
The 5v versus 2v still bugs me though.
#8
it really doesnt matter. As long as 0% throttle is .2 and 100% throttle is 2v. there are plenty of points in between to have resolution. wanna see 5 volts? take the tps off the tb and turn it with a screw driver. i bet you it will turn 1/2 a turn or so and you will hit 5 volts. your tb on the other hand only turns 1/4 a turn. so you will never see 5v.
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