Checked the car this mornng and it was definately reading code 34. Reset the ECU and then 55 OK. Boost up from 6 to 10psi.

After half a mile back into Safety Boost and code 34.

How can I fix this problem. Is it OK to fit a resistor across the Det Sensor, or I'm I risking bigger problems by linking it out.

My ECU hasn't been chipped yet and I have fitted Apexi BOV's, Divorced downpipes with decatt and Mongoose catback system and Blitz SUS Induction.

I've been told the ECU isn't set up for these mods and that is why the car is running lean and into Safety Boost.

I'm also about to fit a Greddy ProfecII Boost Controller. Does this controller link out the Det Sensor anyway?

If I fit a chipped ECU, will this also fix the problem?

I also have a confession to make ~ When I bought the car, I knew very little about them (don't know much more now to be honest) and was running it on 95 octane fuel, for about 1500 miles. Could this have caused damaged to the engine? and could this be the reason why I'm geting code 34.

 

Sorry for 101 questions, just trying to learn as I go along, but hopefully not the hard way.

Cheers

Steve

I'm obviously on Optimax now and have been for about a month

errmmm....

 

Probably a chip would sort it.

At the mo your taking in and pushing out more air/fuel than the std chip can cope with.

 

You could also try dissconnecting your battery for at least 2hours for the ecu to reset itself as its probably still running its programme for the 95ron fuel and the extra oomph in the optimax might be upsetting it.....although its a self learning system and should learn the new properties but give it a try anyway...sounds like you got nowt to loose.

 

I wouldnt expect it to be too good on boost untill you have chipped it....

You can try a safe chip like a "JWT" or if you want a more aggresive chip then prehaps a "Mines" which i think makes it run leaner at stages so its cruicial you have O2 sensors in good working order.

 

As for causing any harm on 95ron...I dont think so(only if its detting)....i think others have run on this but dont expect any power from it.

 

Bottom line...Get a chippy :duffer: and go from there

errmmm....

 

Probably a chip would sort it.

At the mo your taking in and pushing out more air/fuel than the std chip can cope with.

 

You could also try dissconnecting your battery for at least 2hours for the ecu to reset itself as its probably still running its programme for the 95ron fuel and the extra oomph in the optimax might be upsetting it.....although its a self learning system and should learn the new properties but give it a try anyway...sounds like you got nowt to loose.

 

I wouldnt expect it to be too good on boost untill you have chipped it....

You can try a safe chip like a "JWT" or if you want a more aggresive chip then prehaps a "Mines" which i think makes it run leaner at stages so its cruicial you have O2 sensors in good working order.

 

As for causing any harm on 95ron...I dont think so(only if its detting)....i think others have run on this but dont expect any power from it.

Bottom line...Get a chippy :duffer: and go from there

I reset the ECU today and it went straight into Safety Boost after half a mile or so (code 34).

I cannot fit a chip onto my ECU as it's a series 4 and completely different to the older series 1 or 2 ECU's. I'm buying Macca's old board from his car which is already chipped and fitting that to mine. I've checked it out with ECU guru's at NMGB and they have told me an older 16bit board can go straight into my car. The only difference between the 2 is that mine is a 32 bit board and was only changed for emmissions.

Surely if it's keep droppng back into Safety Boost, something must be wrong. I wouldn't have thought the wires on the Det Sensor would be corroded as mine is a very late model.

Steve

A Chip will not help with a faulty det sensor. You either need to replace the Det sensor and wiring , or bypass it.

 

Details here : http://www.300zx.co.uk/forums/showthread.php?t=45438&highlight=code34

code 34 is a fault in the det circuit - either the det sensor itself or the wiring up to the ECU.

 

Vijay

code 34 is a fault in the det circuit - either the det sensor itself or the wiring up to the ECU.

 

Vijay

What if the Det Sensor is working fine and the wiring to the ECU is also OK. The Sensor could be telling me I actually have a genuine problem with the engine.

Asuming it is working fine, what could the problem be and how can I fix it.

Could it me the timing?

Steve

What if the Det Sensor is working fine and the wiring to the ECU is also OK. The Sensor could be telling me I actually have a genuine problem with the engine.

Asuming it is working fine, what could the problem be and how can I fix it.

Could it me the timing?

Steve

 

No, as already said, Code34 means there is a fault with the Sensor or Wiring....it does not mean you are getting detonation or anything else is wrong.

 

It simply means the ECU is no longer gettign a reading from the Det sensor, the only reason for this is that the sensor itself has failed, or the wiring between the ECU and sensor has failed.

 

Cost is around £100-£1150 for the sensor and hardness plus labour, which is quite extensive. (somebody recently paid £600 parts & Labour). Or bypass it, as per this link : http://zhome.com/ZCMnL/PICS/detonationSensor/detonationSensor.html (its very simple to do. Just Solder a 1megohm resistor to the connector.

No, as already said, Code34 means there is a fault with the Sensor or Wiring....it does not mean you are getting detonation or anything else is wrong.

 

It simply means the ECU is no longer gettign a reading from the Det sensor, the only reason for this is that the sensor itself has failed, or the wiring between the ECU and sensor has failed.

 

Cheers

It seems a lot clearer now. Told you I was no "Mechanic of the year"

So What would you recommend:

1. Resistor wire across the Det Sensor

2. Fitting the Greddy Boost Controller, which I'm told will bypass the sensor anyway.

 

Steve

Cheers

It seems a lot clearer now. Told you I was no "Mechanic of the year"

So What would you recommend:

1. Resistor wire across the Det Sensor

2. Fitting the Greddy Boost Controller, which I'm told will bypass the sensor anyway.

 

Steve

 

The boost controller wont bypass the sensor. What it will do is prevent the ECU from being able to restrict boost in safety mode as ECU can no longer control the boost. It will still retard the timing, and reduce performance though.

 

Personally, I would bypass it with the resistor, and then if you ever need to have the engine out or other major work later on, then get the Det sensor replaced at that time.

The boost controller wont bypass the sensor. What it will do is prevent the ECU from being able to restrict boost in safety mode as ECU can no longer control the boost. It will still retard the timing, and reduce performance though.

 

Personally, I would bypass it with the resistor, and then if you ever need to have the engine out or other major work later on, then get the Det sensor replaced at that time.

 

Cheers, and thanks for the time

Steve

you could relocate the sensor this is easier than replacing the sensor as this is a hell of a job as i know as i did it and spent a fortune on gaskets and det sensor and i wished i relocated instead if . this link takes you through how to do it

http://www.angelfire.com/geek/vg30dett/DSR/DetSenRel01.html

A Chip will not help with a faulty det sensor.

lol ...yer...sorry steve...

I read this bit:-

 

I've been told the ECU isn't set up for these mods and that is why the car is running lean and into Safety Boost

 

And thought you wanted to know if the chip would cause an engine to det.. :nelson:

 

Prehaps i should of read the title

"Code 34 Det Sensor fault"

:headvswal :D

you could relocate the sensor this is easier than replacing the sensor as this is a hell of a job as i know as i did it and spent a fortune on gaskets and det sensor and i wished i relocated instead if . this link takes you through how to do it

http://www.angelfire.com/geek/vg30dett/dsr/detsenrelo1

 

Linky dont work :cry: ;)

try now i think its fixed

I wouldn't recommend relocating the det sensor ... I know, I know .. people have done it, but it was in that position for a good reason in the first place ...

I wouldn't recommend relocating the det sensor ... I know, I know .. people have done it, but it was in that position for a good reason in the first place ...

thats what i said so i did mine correct but was told by many people and a nissan machanic i should have relocated it but i didn't listen and did the full job. saying that my friends det sensor on his subaru was on a bracket coming of the outlet manifold odd place that

Yes .. sorry mate .. you did do it properly .. respect to that .. I remember you posting about it ... other don't though ... sorry didn't mean to get you angry :-)

I mean .. relocating the det sensor LOL ... hmmm I don't think so ...

Yes .. sorry mate .. you did do it properly .. respect to that .. I remember you posting about it ... other don't though ... sorry didn't mean to get you angry :-)

how could i be angry when you have a face like that <:->

reminds you of your Mrs .. hmmmm :-)

reminds you of your Mrs .. hmmmm :-)

yep from behind

so if your getting code 34 and clear ecu so you have 55 then temp fix in resistor and ecu shows 34 again does this point to wiring to ecu dodgy? if so what wires on ecu up to plug would need to be replaced?

an dont say det sensor wires lol I mean colour and position on ecu cheers

SHUT IT DIPLICK .. LMFAO ... I mean dipstick ,, ehhhh dipone ..

 

I have lovely eyes you know .. lol

you see ...

 

Just like you Mr's tits .. like likkle eggs .... but orange ;-)

i had exactly the same problem a few months ago. Bypassed it and had no problems since. engine is not modded so i have had no detting. A pack of 10 1meg resistors was 30p and a quick check to see if its going to clear the code, remove the connector for the det sensor harness, take a resistor and fold each leg over and press it into the female socket. reset the ecu and go for a drive. if you get no faults then the harness is ok. if you want to leave it in wrap tape round it. or if your sure the det sensor is fooked, cut the plug off it and solder the resistor into it.

Its been said previously, but a code 34 does not mean the engine is detting, just that the sensor is open or short circuit (dead)

 

good luck

Its been said previously, but a code 34 does not mean the engine is detting, just that the sensor is open or short circuit (dead)

 

good luck

Cheers, thats certainly reassuring

Steve