mk3 2.0 gti 16v abf (96) idle and miss firing at 3,000rmp

[mani12354]

i cleaned the throttle position sensor and tryed disconnecting it still didnt solve my problem 

@ leon, umm where can i get a new ecu replay from??

[mk2_abf]

another thing to check is the wiring from throttle postion sensor follow where it goes they usually clipped to the rocker cover, theheat off the engine over time can make the wires really brittle and start to break down

[Leon27]

another thing to check is the wiring from throttle postion sensor follow where it goes they usually clipped to the rocker cover, theheat off the engine over time can make the wires really brittle and start to break down

Happened on mine as well. Well worth a look.

ECU relay 30 is availiable from VW or Trade Parts Specialist (TPS) Not that expensive £15ish? and very much over looked when diagnosing

[mani12354]

  i dont no what i done but i fixed the mpg geting between 30 - 40 mpg on the motorway but the stuttering is still there at 3.000 rpm :

[trigolf]

As previously mentioned replace the vacum pipe that runs from the back of the inlet manifold and along the bulkhead to the ECU  - which sits under the plastic trim at the bottom of the windscreen. Check the crank sensor wiring loom  - it gets brittle from the heat from the engine block.

[mani12354]

i checked the vacum pipe thats why im geting better mpg and where is the crank sensor any pictures??? 

[thai-wronghorse]

Was the pipe split or loose then?

The crank sensor is situated just behind the oil filter to the left. Its a lot easier to access by removing the front engine mount bracket.

[mani12354]

nope it was tight as anything  :O but i noticed one thing when i went to start my car after it didnt start then i banged the terminal on the battery and it sorted out my mpg do u fink it could be a lost batterry?