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Brendan Hax
Tinkerer
JZX90 Chaser Tourer-V

Posts: 13
Reg: 07-2005

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Sunday, August 28, 2005 - 12:32 pm, by:  Brendan Hax (Chaser_94) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

as i have no licence for the last 3 months, my car has been driven very sedately by my g/f most of the time. but i found that at night time my car is cutting out sometimes, but only when it's cold. If i get her to floor it while doing any speed during the day, it just gets on and boogies. But at night, it goes and then the engine light comes on the dash, and the car just stops pulling. it's like a speed limiter but without the jerking, but as soon as you back off and give a second or 2 it picks up power again. It will not do this during the day at all.

any idea's anyone? it's running neils steelwheeled turbo's and no form of boost controller, but still reaches around 12-13psi. at night could this be reaching maybe 14psi and then hitting boost or fuel cut? is that harsh like a speed cut?

Hope someone can help me, thanks
Dragan Vidic
TryHard
soarer tt

Posts: 121
Reg: 07-2005

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Sunday, August 28, 2005 - 03:52 pm, by:  Dragan Vidic (Soarer_ttt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

yeh could be boostcut ...get a gauge and have a look
Brendan Hax
Tinkerer
JZX90 Chaser Tourer-V

Posts: 14
Reg: 07-2005

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Sunday, August 28, 2005 - 06:21 pm, by:  Brendan Hax (Chaser_94) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

i have but it's a lil hard to see from the passenger seat. i can see it goes to at least 13-14psi, maybe a lil more.
Graham Dollisson
TryHard
GT-TL

Posts: 155
Reg: 07-2005

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Sunday, August 28, 2005 - 06:31 pm, by:  Graham Dollisson (Alloyvee) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

A little more than 14psi will do it!!
Dragan Vidic
TryHard
soarer tt

Posts: 122
Reg: 07-2005

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Sunday, August 28, 2005 - 06:36 pm, by:  Dragan Vidic (Soarer_ttt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

yep time for a FCD
Cameron Faint
Newbie
soarer TT

Posts: 3
Reg: 07-2005

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Monday, August 29, 2005 - 01:39 pm, by:  Cameron Faint (Camfaint) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

That happens to mine nice cold crisp air at 3am in the morning going to work and it'll hit the boost cut
Cihan Aday
TryHard
JZZ30 Twin Turbo

Posts: 165
Reg: 07-2005

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Monday, August 29, 2005 - 06:03 pm, by:  Cihan Aday (Cihan) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

What mods have you done Brendon?
Shouldn't be hitting boost cut for no reason!
Aaron Casey
Newbie
jzz30 gttl

Posts: 2
Reg: 08-2005

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Monday, August 29, 2005 - 09:18 pm, by:  Aaron Casey (Blownminiturbo) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

i had the same problem, i had a look into it and it ended up being a missfire under more boost. i found that my plugs were tracking down the side under heavy load but only on cold days/nights. as the more oxygen from cold and more boost means more fuel which makes it harder to burn so needs bigger spark to ignite mixture. a new set of iridium ix plugs fixed my problem. could be something totally different but i hope this helps you.
Brendan Hax
Tinkerer
JZX90 Chaser Tourer-V

Posts: 18
Reg: 07-2005

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Friday, September 02, 2005 - 08:39 pm, by:  Brendan Hax (Chaser_94) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

i have a 3" HKS exhaust, neils steelwheeled turbo's and a front mount. I'm not running a boost controller. I've got new plugs, welll done around 15,000kms now. They are iridium, which i know now that most people try and stay away from but at the time that was what i bought.

Also it is creeping gradually, like it fully spools and sits on 11psi, but then as the revs get over 5500-redline it starts to creep a few psi. Would have a boost controller overcome this? I know that having too small a wastegate can cause this as there is too much air and not enough being bleed through the wastegate. I don't think that should be the problem as noone else with neils turbo's has had this problem. Any idea's would be sweet.

get my licence back at midnight tonight so LOOK OUT BRISBANE ;)
Brendan Hax
Tinkerer
JZX90 Chaser Tourer-V

Posts: 20
Reg: 07-2005

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Saturday, September 03, 2005 - 06:14 pm, by:  Brendan Hax (Chaser_94) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

just wondering if a slipping auto could cause the boost to be rising? i doubt it but it's worth a try to see what people say?

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