I bypassed my det sensor with a resistor about 6 months ago and got rid of the code 34. I have had a new engine fitted since then and have been told that the sensor was working fine on it before it was removed from the other car.

 

I was at Zfest the other week and was told that with the resistor fitted it will get rid of the error but the ecu will still know the difference as the sensor normally gives different resistances, not the constant 1k ohms. He also said that it will still run safty boost and the timing will be retarded.

 

I have a boost controller which overrides the safty boost but I'm worried about the timing being retarded due to this. i asked him to check the timing on the consult to confirm but he said the the consult only reads what the ecu expects, not the actual timing?

 

Now i know that the resistor will bring a normal car out of safty boost as so many people have proved so he is wrong there but anyone know about the timing / maps the ecu will use (JD chipped ecu).

 

I could reconnect the sensor now as I should have a working one but is it worth the bother?

who told u that.....as he is wrong!

The resistor mod will prevent the car from recognizing a det sensor fault. Which means it wont go into safety mode for a code34, therefore boost will be normal as will timing.

Thats what i thought :) Which is also why I didnt name him!

Ok so im going to reconnect the sensor to see if it works, will keep the resistor handy.

 

If i remember rightly there are 3 wires on the plug on the engine loom, one is not used.

 

The ecu loom on mine doesnt have the other half of the plug as I cut it off! I just joined the two wires on the ecu loom with the resistor between them.

 

Can you remember which wire goes to which wire, ecu side, engine side?

I know who told you LOL :tongue:

If i remember rightly there are 3 wires on the plug on the engine loom, one is not used.

 

No, two cable one black one white.

 

was at Zfest the other week and was told that with the resistor fitted it will get rid of the error but the ecu will still know the difference as the sensor normally gives different resistances, not the constant 1k ohms. He also said that it will still run safty boost and the timing will be retarded.

 

Jeez .............what the ???? incorrect advise given this way is the worse kind, it undermines the reason owners come here and to meeting.......to get help and advise... correct advise course!

 

Daveman

No Jeff it wasn't me, I left the laptop at home lol

No Jeff it wasn't me, I left the laptop at home lol

 

:confused: Tweaky did not mention you...is his real name Jeff Then?

 

 

Daveman

:confused: Tweaky did not mention you...is his real name Jeff Then?

 

 

Daveman

 

LOL how many logons you got?????????????

Just in case you edit your post "Daveman"/JAYZW

Disconnecting the knock sensor will set a DTC "error state" because the ECU will detect an open circuit. Grounding the knock sensor signal wire "fitting a 1k ohm resistor" won't work either, because the ECU will put the engine management system into a default mode if it doesn't receive a varying voltage signal from the knock sensor. The ECU begins referring to the knock sensor signal when engine speed exceeds approximately 2000 rpm under load. Even a normally operating engine will cause the knock sensor to produce a weak voltage signal under these conditions. You may reach a higher boost by grounding it out but not the full potential of your engine.

 

Is this what the guy was refering too

Just in case you edit your post "Daveman"/JAYZW

 

:confused: was playing with ya ie.your post in private the section about the connection you said with Daveman and this jeff guy :headvswal

 

Jay

Disconnecting the knock sensor will set a DTC "error state" because the ECU will detect an open circuit. Grounding the knock sensor signal wire "fitting a 1k ohm resistor" won't work either, because the ECU will put the engine management system into a default mode if it doesn't receive a varying voltage signal from the knock sensor. The ECU begins referring to the knock sensor signal when engine speed exceeds approximately 2000 rpm under load. Even a normally operating engine will cause the knock sensor to produce a weak voltage signal under these conditions. You may reach a higher boost by grounding it out but not the full potential of your engine.

 

Is this what the guy was refering too

 

The "guy" is clearly you ;)

 

Fitting resistor not only removes error code, but takes the car out of safety mode. ECU continues to use the Normal timing and fuel maps with full standard boost.

 

I see what your trying to say but Neither boost or timing is retarded for anything related to the knock sensor with the resistor fitted. Proven more times than I have had hot dinners.

Oh dear what have i started!

 

looks like im going on the rolling road with the resistor in.

 

They will have thier own knock sensor attached anyway

youve not started anything purposely Ed, Daveman and JAYZW are now banned as they were the same people.

...

youve not started anything purposely Ed, Daveman and JAYZW are now banned as they were the same people.

Only took 18months :rolleyes:

 

I have nothing against the banned user, but they are the rules.

better late than never! :D

the silly thing was, what else could ZW have stood for? not really the sharpest of moves, any back to Eds resistor lol

Now who's the fly pitcher? :rofl:

Now who's the fly pitcher? :rofl:

 

its ok for you to call people names... but you get hyped when you think its aimed @ you??

i think its more the irony, Athene, that he finds funny, than the name, how andy was accused of being a fly pitcher for a quote made by him on the very thread about the real flypitcher was coming on here under aliases after being banned.

 

Plus Fly Pitcher thats going to stick now lol, it is very funny lol

its ok for you to call people names... but you get hyped when you think its aimed @ you??

 

:rofl: It was the pure irony of it ;)

How can two wires and one sensor cause so much controversy? A knock sensor has one purpose...to detect knock/pinking which is caused by pre-detonation. It is self monitoring system to protect the internals of the engine. Pinking can be caused by a handful of variables such as incorrect fuel or a ignition angle that is excessively advanced. By replacing the sensor with a resistor that matches the resistance of the knock sensor will erase the fault code stored in the ECU. The engine will not run on safety boost. However, under certain conditions, the ECU will advance the ignition angle excessively, as the knock sensor circuit is effectively open loop, where there is no feedback from the sensor as it has been replaced with a resistor. This over advance of ignition angle can hinder performance.

There will be NO over advance of timing by the ECU - the Z32 only subtracts from its base maps if it detects knock. We're talking about a 20 year old system here. Very very basic ECU. Want more info PM me....