3000 rpm+ power loss

[robreidmotors]

Just found this whilst reading about ibizas, may be helpful to anyone struggling with this issue;

'Power loss on TDI 90s over 3,000rpm can be cured by replacing a thin hose that runs from the exhaust, near the turbo, to the ECU.'

 

[Muttley]

That's running from the *Inlet* near the turbo, not the exhaust. Even though Honest John says the exhaust, he's wrong.

This is good advice, but only valid for early TDI 90's (AHU, 1Z and the like - Mk2 Ibiza's etc) - the hose is taking manifold pressure to the Manifold Air Pressure sensor, which on these engines is integrated into the ECU. Later engines (including everything bigger than 90bhp, I think) has the MAP sensor in the manifold, together with the Manifold air temperature sensor.

 

[cheshire cat]

That's running from the *Inlet* near the turbo, not the exhaust. Even though Honest John says the exhaust, he's wrong.

This is good advice, but only valid for early TDI 90's (AHU, 1Z and the like - Mk2 Ibiza's etc) - the hose is taking manifold pressure to the Manifold Air Pressure sensor, which on these engines is integrated into the ECU. Later engines (including everything bigger than 90bhp, I think) has the MAP sensor in the manifold, together with the Manifold air temperature sensor.

yes and even the small tube inside the ecu can fail and is replaceable