Actually got my zed out of safety boost for the first time yesterday, what a difference :dance: . Done the diagnostic which came up with coolant temp sensor and detonation sensor. Cleaned the connections on the coolant sensor, will be fitting resistor to detonation sensor as soon as I get a chance to get one. Has anyone got any bad experience from fitting resistor?

I have fitted a resistor, no problems. The DET sensor is only good below 3k rpm IIRC

Det sensor only really protects against bad fuel. There's too much background noise above 3k rpm so the ecu ignores it. To get det below 3k you would have to have some pretty bad fuel. Just be aware that you no longer have this protection ;) If you still have code 34 then you'll still be in safety boost. Its not JUST the boost decrease (2psi) which makes the major power difference - the ecu also uses much more conservative fuel and timing maps so the engine is operating nowhere near its potential...

Thanks for this. Had a code 55 when I cleaned the temp sensor, went for a drive and boost guage read 10ish psi for a while and then went restricted again. When I came back had a code 34. I am using 98 RON fuel.

Would suggest you have a break in the det sensor harness then ;) The det sensor is mounted in the centre of the V at the bottom of the block, under the lower intake manifold. There is then a short 'patch' lead which brings the connector to the main harness on top of the upper intake manifold. Its usually the patch lead which causes the problems.

 

I've seen others before where the det sensor itself has actually melted onto the block. Or, as below, on my original engine, nice green corrosion:

 

 

Like I say though its usually the harness that causes the problems. Too much work to get to the det sensor to clean/replace it so stick the resistor in :) Just keep an ear out for any detonation though ;)

Will do that as soon as I get a chance, many thanks for the information.

1Meg Ohm is the value you need by the way :) Just stick it in the ECU side of the loom and tape it up :) If you still get code 34 then there's a break in the ECU loom itself - in that case trace the wires back to the ECU connector and fit the resistor there :)

1Meg Ohm is the value you need by the way :) Just stick it in the ECU side of the loom and tape it up :) If you still get code 34 then there's a break in the ECU loom itself - in that case trace the wires back to the ECU connector and fit the resistor there :)

whats your thinking of the studed bar going to the block and mounting it on that andy,its still picking up the "low frequency" resonating from engine :)

The ECU has DSP signal processing of the signal from the det sensor. Not 100% sure but i'd have thought it would be tuned to what it would 'hear' in its specified location. Moving it elsewhere could make either the ecu over sensitive, constantly putting the car in safety boost, or make it less sensitive rendering it useless anyway.

The ECU has DSP signal processing of the signal from the det sensor. Not 100% sure but i'd have thought it would be tuned to what it would 'hear' in its specified location. Moving it elsewhere could make either the ecu over sensitive, constantly putting the car in safety boost, or make it less sensitive rendering it useless anyway.

so with a tight pair of 501,s and the bar put between ones legs it would,nt cause the car to dett :cool:

No it couldn't CAUSE the car to det. It only allows the ecu to take measures to prevent det when it detects it.

No it couldn't CAUSE the car to det. It only allows the ecu to take measures to prevent det when it detects it.

:rolleyes: :rofl: :rofl:

You could always relocate the sensor to the back of the block. A few of the guys on tt.net have relocated to the the block, just below the head. That way it still senses some det. if it occurs.