Souleyman

On std 4x4 lambda cossie (turbo with T34 comp. wheel) I have light failings in-run under the full boost (11psi) when drives on road light ascent. If drives on a equal way that's all right.
In what is the problem, mates?
Fueling, ignition, knock sensor, not correct boost control?

tabetha

What coil/plug gap/plugs are you using ?
tabetha

Souleyman

gpA coil, magnecor kv85 leads and std motorcraft AGPR12PP plugs with std gap

tabetha

Std ford gap way too big, try 0.6mm
tabetha

Souleyman

Thank you!
I'll try 0.6
And what trying when I'll get a 330hp chip?

Souleyman

I tried 0.7 gap but when I drives with full boost, road uphill, 4 or 5 gear the car still abruptly twitches. And in this times cursor of the boost gage twitches too.

Is there a knock sensor or some overboost, mates?

mechanic28

iTrader: (5)

hmm strange u say it drives fine on a flat surface what boost does it hold??is she standard if so i would say 11psi is too high on a standard map??

Souleyman

It holds 11.5psi, but my defi turbo gage can remember the peaks and it show boost near 14psi. not 14psi yet, but more then 13psi.

I don't know behaviour of cosworth ecu in overboost and I don't know what occur when the knock sensor start to send the signals of detonation. And I can't to compare this feelings on a driving...

May be I have this trouble because actuator can't to hold peaks of boost with my larger compression wheel of the turbo.
But may be it is detonation that detect the knock sensor...
I don't know.

Souleyman

mechanic28
Yes, mate, when I drive on a flat road everything is all right, and if the car is on 1-2-3 gear the acceleration is good and assured. But when I enhance the load (higher gears, uphill) sometime I get this problem...

mechanic28

iTrader: (5)

what stage of tune are u on stage 1??

Souleyman

just stock, no stages of ecu. But the turbo was modifided for greens.
I hope to get this stage of ecu soon, but now I on a std 4x4 mapping yet.

mechanic28

iTrader: (5)

i c so u have a t34 turbo fitted??u r running to much boost for a standard map thats why you are gettibg the jerking its the ecu cutting out the boost (going into a limp mode u need to turn the boost down!!plus if u have got a T34 fitted the map wont like it due ti the increase of air the turbo is giving u need to turn the boost down chap

Souleyman

mechanic28
That's not a t34 , it just have a compressor wheel size like t34. the housings and the turbo wheel is from t3 4x4.
But the tendency is the same.
Thanx, mate!

stevecossy

As mechanic28 says your running too much boost for the ecu std map.
You realy need to turn it down to std till you have fitted a 31 act and chip, if your going to use greens then stage 3 it is.
The ecu on a cossy does not have a limp mode but it will cut out when your trying to make it do more than its map.

mechanic28

iTrader: (5)

no probs chap just turn down the boost say wind the actuator out by one turn all should be ok

JTECH James

iTrader: (13)

OVERBOOST! your ecu is preventing you from running the boost level you have,to save your engine!

Stu @ M Developments

iTrader: (12)

You cannot run more than 10psi on that system without the correct chip and map sensor without running into problems like this.

Souleyman

Stu @ M Developments
I remember our talks about it, pal. Just will find some free money for this and mail you about details of the order