I have a Boomba Racing Throttle Body with a new OEM Evo IX TPS. I'm trying to position the tps per the service manual. The service manual states to run a continuity test over pins 2 and 4, then mount the tps and rotate until the voltage reading is between .535v and .735v.

As the tps sits at the furthest it can be rotated and still allow the bolts to screw in the voltage is around .38v. If I rotate it to where I get to .535v the tps' bolt slots are way past the threaded holes of the throttle body. I.e. it seems impossible to get this to spec.

I contacted Boomba and they tell me they've never seen this and suggested a possible faulty tps.

I'm somewhat skeptical that it's a faulty tps. The reason is that I noticed on the stock tb the tps rotates and mounts at an angle upwards, which on the boomba happens to be about the same angle/position where I finally get to .535v (yet can't mount). The boomba's mounting orientation seems to limit the tps to almost a horizontal position.

Has anyone run into this before and perhaps have an explanation for what's happening? I realize I can probably just compensate in the ECU for the offset in voltage but I'd rather avoid that if possible. Wondering if others have mounted their tps in spec without issues so I can decide whether or not I need to return this tps.

Thanks!

 

I actually use EvoScan to set up my TPS right on my Boomba logging and adjusting on the fly. My TPS is 12.994 or 13.333 at the sweet spot, any lower it dies, any higher it isn't happy and revs too high at idle.

 

Anyone?

 

I do something similar, but I just focus on getting the car to reach between 99-100% TPS in EvoScan w/ the pedal fully depressed . Without having the pedal depressed my numbers are similar to yours.

 

I only log 8.6% at idle, could this be the reason for a wandering or rough idle, and timing ign jumps at part throttle?

 

Which table in Ecuflash is used for TPS adjustment?

 

bump for more info i am starting to think this is my problem.

 

Is 99.4% TPS reading fine in evocan when pedal is fully pressed? Idle figure is 15%. If I set it 100% at WOT, Idle TPS reading shoots up to 20 . Using the boomba tb.

 

99% is fine, you will never get it to repeatably hit 100%.

 

When I set it at a particular no it never changes. So if its set at 99.4% at WOT it will always be reading that. Is that all good?
Thanks for the quick reply bro.

 

yeah, 99% is fine.