been to have a look at a local zed owners car (thanet) who's having gearbox problems.

 

its a N/A Auto

 

problems:

 

harsh gearchange from 1st to second

changes up too late at light throttle

surging at low throttle

 

he has been to an auto specialist who said the box was ok but suspected the TPS

 

i done an engine ECU diag - all clear

g/box diag shows a fault with the throttle circuit

 

tps tested ok but i swapped for a new one i had anyway - made no difference

 

any thoughts??

 

concerned why the g/box would show up a throttle fault with the engine ecu clear. poss fault with the auto ecu or wiring??

Sounds like a wireing fault! as the Auto box ecu uses the TPS to signal the kickdown

 

Just my 2p worth