About 90mph+ pulling in 5th gear bout 3000rpm the turbos kick-in...loadsa welly...then...went into safety boost mode :mad:

Is it normal tryin to pull too lower gear or should it not do that whatever the gear or revs??? :confused:

Safety Boost normally only kicks in when i first start car in mornin...No problem any other time.

Is it Kacky fuel or problem elsewhere?

Im runnin ESSO supreme 97ron(supposedly)

JWT chip n 15psi

Dont know if this is related or not but my "CAT LIGHT" doesnt flash up anymore like it used to. :dance:

 

:duffer: :duffer: DRINK UP CHAPS....Next Round Please :duffer: :duffer:

something wrong there, most likely to do it in 5th as you'll be pulling for longer, and the temps will rise quickly.

15psi is going to strain stock injectors and I found mine was leanest when the turbo's were spooling, even though it was over fueling at high rpms.

 

Solution is to turn the boost down and get your A/F ratio measured.

something wrong there, most likely to do it in 5th as you'll be pulling for longer, and the temps will rise quickly.

15psi is going to strain stock injectors and I found mine was leanest when the turbo's were spooling, even though it was over fueling at high rpms.

 

Solution is to turn the boost down and get your A/F ratio measured.

 

How to measure it...

You mean on the Conzult???

Could Timeing be a prob???

That's probably the most common area to get det, low revs, large throttle opening at max torque. Turn your boost down, back off the ignition timing and increase the fueling - one or all will fix the problem (or at least move it around a bit). Proper fix is getting it setup right on a dyno.

That's probably the most common area to get det, low revs, large throttle opening at max torque. Turn your boost down, back off the ignition timing and increase the fueling - one or all will fix the problem (or at least move it around a bit). Proper fix is getting it setup right on a dyno.

 

OK....Thanks.....Will book me a session.

Where is the closest recommended dyno setup near me???

Im in Hertfordshire.

OK....Thanks.....Will book me a session.

Where is the closest recommended dyno setup near me???

Im in Hertfordshire.

 

There's a place in Colchester, called T&C (I think), not sure where else near you. The chaps at Thor Racing would be a good bet.

There's a place in Colchester, called T&C (I think), not sure where else near you. The chaps at Thor Racing would be a good bet.

 

:bow: :bow: :bow: TA :bow: :bow: :bow:

Did you hear it det, or did it just go into safety boost?

If it's detting at 15psi with a JWT chip, then it's most likely you have a problem with either fuel pressure of badly adjusted timing, I'd get that checked out before you spend cash on a dyno.

Did it just suddenly start happening?

JWT chips are really safe in the timing, so should be no problem.

Also, are you sure that you're indicated 15psi really is 15psi?

No way will the turbos produce 15psi @ 3000rpm so its not boost related.

It doesn't have to produce max boost to detonate but by frigging with my boost controller I can make mine detonate at 3000rpm under full throttle and that is also with a JWT map.

There's a place in Colchester, called T&C (I think), not sure where else near you. The chaps at Thor Racing would be a good bet.

 

T&M in colchester is who you're thinking ok I think: http://www.t-m.co.uk/

 

Blackmagic: If you look in the dyno section - you'll see the run was performed there. HOWEVER.... the chap has no tuning equipment for our cars, AND, (and this is worst bit) he has no regard for det as I found out. I think the quote was "don't worry - it might stop in a minute!" - Cricky, once det has started, and you're still winding up the revs it gets worse very quickly!

 

Anyway, that was just my experience; but I will say that in future I shall be taking the three hour drive to Coventry for some more professional expertise.

 

Regards

Simon.

Did you hear it det, or did it just go into safety boost?

If it's detting at 15psi with a JWT chip, then it's most likely you have a problem with either fuel pressure of badly adjusted timing, I'd get that checked out before you spend cash on a dyno.

Did it just suddenly start happening?

JWT chips are really safe in the timing, so should be no problem.

Also, are you sure that you're indicated 15psi really is 15psi?

 

Didnt hear it Det...just suddenly poped into safety boost :mad:

I checked the ECU and that gave me code 34 which is DET.

I will have a look at timing first then...Im all for saving my reddies :duffer:

First time ever it happened in high gear as normally it will only happen when i first start car in mornin but fine few minutes later after i reset it. :dance:

As for being sure about pressure....My Turbo Timer has a digital display that was readin max boost and the standard dash gauge was maxed out but i know the dash gauges are sheeiiit.

I have had a proper gauge on it before to test the exact boost at Z-Tech and that read just over 15Psi. :nana2:

 

If you look in the dyno section - you'll see the run was performed there. HOWEVER.... the chap has no tuning equipment for our cars, AND, (and this is worst bit) he has no regard for det as I found out. I think the quote was "don't worry - it might stop in a minute!" - Cricky, once det has started, and you're still winding up the revs it gets worse very quickly!

Anyway, that was just my experience; but I will say that in future I shall be taking the three hour drive to Coventry for some more professional expertise.

 

who and where was/is that place in coventry then plz???....the others sound like cowboys. :xxx:

 

Massive :bow: to everbody for all your advice...Will have to start eliminating the probs one by one...Noah style :smw:

Code 34 isn't set, it's a bad detonation sensor or wiring.

The ECU doesn't give an error code if det is detected.

Code 34 isn't set, it's a bad detonation sensor or wiring.

The ECU doesn't give an error code if det is detected.

 

O..... :x: ...ok....errmmmm....Is it just dodgy or corroded contacts then?

The last ten codes were all 34...

Any guess bud???

If it only happens when wet/cold then it could well be bad contacts.

If the sensor is shot you'll need to replace it which is a bugger.

Can be bypassed with a resistor (10mohm I think) but not recommended.

If it only happens when wet/cold then it could well be bad contacts.

If the sensor is shot you'll need to replace it which is a bugger.

Can be bypassed with a resistor (10mohm I think) but not recommended.

 

HHmmmmmm....ok.....Ive heard about the trouble with replacing the det sensor....Apparently its Wayyyyy down on the side of the block...Major arce hole.

I dont know exactly what it sounds like (DET) but the engine seems to be a bit more vibrationy just before it pops into safety boost.

It is normally ok under torque....just when its first started from cold.

 

Could it be linked to crapee fuel from ESSO...its the 97ron supreme stuff.

If i bypass the sensor exactly how much or what damage will it do to my Z???

If it only happens when wet/cold then it could well be bad contacts.

If the sensor is shot you'll need to replace it which is a bugger.

Can be bypassed with a resistor (10mohm I think) but not recommended.

 

You can like John suggests ,bypass the det/knock sensor using a 1 ohm 5 watt resistor which you can purchase from you local electronics store for a few pence..but this is only normally recomended for testing/diagnosis only..

If the code 34 dissappears after bridging the two wires (with the resistor) that go to the det/knock sensor then you know for sure its either a faulty sensor/wire/connector.

:)

It's Thor in Coventry - one of the traders on here.

 

If you need you timing checked and stuff like that then bring the car over to mine one weekend. I also have a ConZult and a Techtom etc

i had a look at the connector last Sat and looks fine but wires looked abit brittle, didn't have time to buzz it out with a meter

IIRC you can meter it out from the ECU connector - that has to be the best end-to-end test.

Its 1Mohm resistor for the test ;) VERY cheap part from any electronics store. Without the det sensor your engine will have no protection against bad fuel/fueling/timing problems. The det sensor only works under low rev conditions so it can't protect you from bad tuning. It simply can't hear anything above the noise of the engine under higher rev conditions so the ecu ignores it.

who and where was/is that place in coventry then plz???....the others sound like cowboys. :xxx:

 

I'm referring to Thor.

 

I guess there must be somewhere nearer to you actually, since Peter Rosenburg at SE must use someone not too far away. (He has used T&M before - but he doesn't make a habit of it. Also, Pete would have been in the drivers seat, so no chance of him driving your engine through the rev band under det!) Maybe worth a call. Maybe even ask 'MAC1' to see where his car was setup?

 

Hope this helps

Simon.

a big THANKYOU to :-

 

jaffa

andyp

john dixon

andy duff

willyed

(Z)Master

Krsmayo

 

:bow: :bow: :bow: :bow: :bow: :bow: :bow:

 

Very helpfull....

Im on the case...The Z that is ...Not me misses. :x:

 

CheerZ :duffer: