t2Maniac

iTrader: (1)

My tps is set to 1ohm by a functioning voltmeter. But when I look at my Rtek 2.1 ECU is says 15%. It's supposed to be 20% when set at 1ohm correct? Why am I getting 2 different readings?

Also has a hesitation around 1k-3k rpms only after I slightly tap the throttle and it's annoying to drive in stop and go traffic. I'm certain it's because of the slight misreadings.

On my 1987 Mazda RX-7 Turbo II. All this happened after my rats nest removal.

Gregory Casimir

iTrader: (8)

Does that also happen when you cruise from 2500 rpms to 3000rpms with the random lean spikes?

bumpstart

1.. earth offsets between the measuring point .. the contact to earth for the multimeter tip ... and the ecu earth

2..TPS cal is essential for timing the low down accel pump function ( extra injector time to prevent lean out on initial throttle movement ) .. having it out of cal will amount to either no extra fuel here when needed most .,. . or late extra fuel
some people have to adjust below 1 ohm because there is significant earth offset
.. or resistance in the wiring back to the ECU and so that ECU is seeing more than 1 ohm when your multi is indicating 1 ohm

dead spots in the sweep of the TPS will also amount to bad accel pump timing and even 1 rotor fuel cuts in all sorts of conditions they are not required

NativeBeggars

iTrader: (1)

Bumpstart, can't dead spots lead to detonation or misfire?
I seem to have been having a similar issue, but some slight adjustment to the screw made it better. I get the narrow band code; 14 when I take my foot off the gas. But any slight amount back on the pedal and it goes away.
Under accel/WOT, smooth as silk, same for idle. Startups are quick and effortless whether hot or cold. But holding a constant speed, sometimes I see dead spots.
My car is a frankenstein but I have an S5 TPS. Stock ECU and injectors.

t2Maniac

iTrader: (1)

It does, it only occurs under 3k rpms. After that it is smooth.

Bumpstart, I will check the resistance of wires sometime this week from the ECU to tps making sure there is a good connection.

I appreciate all the help, hopefully I can get this taken care of to start tuning it soon with the rtek.

j9fd3s

iTrader: (3)

bumpstart is probably correct, as your voltmeter needs to be grounded at the same place the ECU is to get a correct reading.

however since the ECU will tell you when the TPS is correct, i would just let it do that, and start tuning