I have cleaned the throttle bodies out, they were filthy, cleaned out the lines and the IAA unit, set the idle down and now running at 700 rpm and smooth. When I tested the DC Voltage from the centre pin of the TPS to the battery earth, it read 8.42 volts, any idea why ?

Did you test with it connected or disconnected?

 

Jeff

I tested it connected with ignition on, engine off and again with the engine running , the readings were the same.

Took the car out today on a road test and tickover is set at 700rpm, moved the TPS back slightly and got a reading of 8 volts. car runs great can't explain the voltage I would have expected to see 0.5 volts.

i got a spare tps if it will help in any way

Thanks I'll keep that offer in mind if all else fails, I'm just curious to find out why the reading is so far out yet the car runs brilliant.

My zed is always playing games with me sometimes will be running fine then other times starts playing up and i look for a fault and then it goes again :confused1:

Got the TPS set correctly now and the Idle full in and it is still 1000 rpm so it looks like a leak somewhere any ideas and would this show up on a datascan?

try spraying some wd40 around the vac/air system eg on pipes that air flows through including throttle body gasgets icv gasket area & see if it sucks the wd40 in you will here the revs change!! i found a few leaks on mine this way!!

Brilliant idea I will try as soon as I can find the bloody car under the snow drift!