ZD30 intermittant throtle fault 43

[Mario]

Hi guys do you familiar with intermittant throttle position sensor fault. Flash fault code 43, removed throttle pedal assembly, tested overboosting switch and tps resistance on idle and full throttle reading 0.7ohms and 1.6ohms. Fitted second hand pedal assembly and still faulting also order genuine tps of ebay. I'm not 100% convinent this will fix issue and try resolve problem before heading out to Fraser Island over Christmas break.  Cheers

[Rumcajs]

G'day,

I've never heard of "overboosting" switch, what is it?

Anyway here:

I would ensure that earthing circuit are correct. Y61 is notorious for bad earths, indeed I recommend running extra earth cable between chassis and body and en

gine and chassis.

Regards

 

[Mario]

Thank you for your reply Rumcajs. I clean earth connections before but definetly will run extra cables for it. I received on Friday reconditioned genuine sensor but I will send back because lever is hard to move due to seized up and rust flakes coming off around shaft. I been driving car and haven't play up since Wedensday morning also got second hand engine ecu from wreckers but not sure if can just plug in if don't have imobilizer for it? Regards overboosting switch I read some info on other forum saying on/off switch under throttle pedal protect from overboost. Not 100% sure on it

[Rumcajs]

G'day,

Chances are that ECU from the wreckers will not be very useful to you without immobilizer recoding. However hold on to that ECU cause you can send (unless you are close to mid coast of NSW) it to have it re-maped and as a part of it they can disable immobilizer so not only you gain extra ponies but keep your original ECU as well. Much better option then diesel "piggy back" dodgy chip.

As far as that "overboosting switch" there is no such thing as a switch.... What happens is that ECU monitors MAF output and correlates it to TPS position and RPM and if values are too high it will derate until you release pedal and re-apply which resets the limp process. That is what happens not the overboosting indeed ECU seems to ignore boost values in regards of this function on Series 1, 2, and 3. From Series 4 onwards there is mapping for boost as well incorporated in ECU fuel mapping and it will limp if you exceed 18 psi but still MAF, RPM and TPS% is considered.

Regards