eletor

I'm wondering what percentage the TPS should be reading when completly closed and opened.

My set up is a 88tII with a brand new TPS and RTEK 2.1. The RTEK is reading 4-5% closed and 95% open. This is while the sensor is simply plugged in and not on the throttle guide, also when installed functionaly on the throttle body. Is this normal?

thanks,
jim.

1SWEET7

iTrader: (1)

Yes it is completely normal.

HAILERS

Just to help you understand how the TPS percentage works on the RTEK 2.0........................The maximum Voltage of the TPS is 5vdc. A properly set TPS will output 1vdc to the ECU.............1vdc is 20% of a possible 5vdc. So a properly set TPS on a series four using a RTEK 2.0 will be 20% IF the engine is fully heated up.

The reading will not be 20% if the engine is cold and has the stock water thermowax. It'll read a higher figure than 20% but as the engine fully warms up the percentage will slowly fall to the 20% figure. IF it reads say 21%.......not worth adjusting. Same if it reads 19% ..not worth adjusting.

The TPS plunger is fully extended to its max just at the point where the throttle linkage starts to move the secondarys to open. So there's a lot more movement of the throttle linkage after the RTEK 2.0 reads 100%. If the max it reads is like 98%.....not to worry. Matters not.

Someother fuel controllers will show 0% at idle. Like the SAFC if memory serves. The show 100% at the same point the RTEK 2.0 does.

So if you have a RTEK 2.0 and want to set the TPS, just fully heat the engine up then turn the TPS screw til it reads 20% while you idle the engine. No need for LED lights or ohming out a TPS pot. Waste of time to do those.

arghx

iTrader: (3)

Yes some systems will "normalize" the TPS reading based on the observed voltage range.

a narrow range TPS can read .7 - 1.0 volts at idle and be within spec

1SWEET7

iTrader: (1)

There is actually a sweet little dialogue in the Rtek software that allows you to set the idle step by step very easily.