car cutting out
09 July 2007, 08:13 PM
#1
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car cutting out
just wanted to know if anyone has had this problem,whats happening is when i was on my way back from southend on saturday i was in 5th gear put my foot down it picked up and it boosted up fine then it just cut out it was just like it died,
once foot relised the power would come back but if i put my foot down again it would do the same thing again,it only seems to do it in 5th gear it aint got a limiter cause ive been over the the limit that it says it cut in at,also last owner said it had been taken off,any help please if anyone has had the same problem,
,cheers
once foot relised the power would come back but if i put my foot down again it would do the same thing again,it only seems to do it in 5th gear it aint got a limiter cause ive been over the the limit that it says it cut in at,also last owner said it had been taken off,any help please if anyone has had the same problem, ,cheers
09 July 2007, 09:06 PM
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Mine had a simular thing a few years back, it was missing at high boost... and it was only noticable in higher gears.
New set of plugs sorted mine
New set of plugs sorted mine
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Just an idea. 
09 July 2007, 09:22 PM
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I think I'm right in saying you only get maximum boost in 4th & 5th. If you feel like you're hitting a brick wall in 5th under full throttle then I'd say it sounds like the fuel cut defender but as Frayz says it depends on what you've had done to the car, could be something else.
09 July 2007, 09:42 PM
#12
u
I think I'm right in saying you only get maximum boost in 4th & 5th. If you feel like you're hitting a brick wall in 5th under full throttle then I'd say it sounds like the fuel cut defender but as Frayz says it depends on what you've had done to the car, could be something else.
I think I'm right in saying you only get maximum boost in 4th & 5th. If you feel like you're hitting a brick wall in 5th under full throttle then I'd say it sounds like the fuel cut defender but as Frayz says it depends on what you've had done to the car, could be something else.
If it was just blowing the spark out then it wouldnt cut out altogether it would just have a big miss under high speed high load conditions.
09 July 2007, 09:49 PM
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I only get 1.3 bar in 1,2 & 3 but in 4 & 5 it peaks at 1.5 dropping to 1.3 if max boost is set at or close to 1.5 (for instance) then a small overboost (due to a failing MAF maybe) could make it hit the fuel cut defender.Ooooh look at me talking shop with Frayz
09 July 2007, 09:56 PM
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HHhhhmmmm that'll teach me.
My point remains though, if you go above the maximum boost the you'll encounter the defender. The reason you went above max boost I cannot comment on.
My point remains though, if you go above the maximum boost the you'll encounter the defender. The reason you went above max boost I cannot comment on.
09 July 2007, 09:59 PM
#16
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well as far as i know its got sti engine with sti ecu not sure what year the engine is or if any think inside the engine has been up rated,its got 49000 miles on it at the moment,got front mount fmic dump valve and k&n style air filter,decat, up rated back box,i think thats about it well thats all i know about anyway,
is there anything else that is needed to know to help with my question..?
is there anything else that is needed to know to help with my question..?
09 July 2007, 10:05 PM
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it was running at 1.5 bar when i bought the car but decided to turn it down was this a good idea or should i have just left it were it was ,does tuning up and down the boost effect other things like could the engine have been set to run at that boost or is it just me thinkin to much into it???
09 July 2007, 10:09 PM
#19
it was running at 1.5 bar when i bought the car but decided to turn it down was this a good idea or should i have just left it were it was ,does tuning up and down the boost effect other things like could the engine have been set to run at that boost or is it just me thinkin to much into it???
Bleed valve ??
09 July 2007, 10:20 PM
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yeah i think that would be the one its next to the turbo connected in the pipe line from the turbo would that be a bleed valve that turns up and down the boost,when i turned it clock wise abit it red at 1 bar if i turn it anti clock wise it goes up depending on how much u turn it.should i have left this alone
is this the bleed valve in question
09 July 2007, 10:46 PM
#24
Yes mate
DO NOT
i repeat DO NOT Touch it, turn it, alter it, twist it. Bleed valves are horrid things but can be setup to work well and if setup properly should never be altered without checking for det and AFRs etc.
Id take the car to a scooby specialist mate, without knowing what the cars doing with regards to det/AFR and EGT its hard to say whats wrong. If i had this data i could tell you much easier.
DO NOT
i repeat DO NOT Touch it, turn it, alter it, twist it. Bleed valves are horrid things but can be setup to work well and if setup properly should never be altered without checking for det and AFRs etc.
Id take the car to a scooby specialist mate, without knowing what the cars doing with regards to det/AFR and EGT its hard to say whats wrong. If i had this data i could tell you much easier.
09 July 2007, 10:57 PM
#26
You can take it off and connect the 2 pipes but be careful to moniter boost pressures untill you get it checked out by a specialist.
Like i siad bleed valves are fine if set up and left alone. If youre messing and dont know what youre doing you could easily get on a slippery slope to disaster
Like i siad bleed valves are fine if set up and left alone. If youre messing and dont know what youre doing you could easily get on a slippery slope to disaster
09 July 2007, 11:06 PM
#27
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ok cheers mate will get someone to have alook at it xtream scoobies done a good job on my car last time so think ill take it back there,and see what they say hopefully it aint nothing to bad cause funds are low at the min and i use the car for work oh we will see
10 July 2007, 12:08 AM
#28
As Frayz says, Bleed valves are nasty things, yes, they give you plenty of boost, but at the eventual expense of the engine. Take it off, if you're going to Xtreme's then have a chat with Knowlesy about getting Pat Herbourn to map the ECU with a ScoobyECU.
The best way to get more boost is electronically through the ECU and not through a boost valve or Dawes Device
The best way to get more boost is electronically through the ECU and not through a boost valve or Dawes Device
10 July 2007, 09:00 AM
#29
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You wouldn't know mate, as your car doesn't break 140, like mine
Was doing high speed runs up Brunters at the time, it was like the car just hit a wall, started to splutter, but when you eased off, due to the lower boost, it would start to pick up again, but as soon as I put my foot down again it stated to miss. Under half throttle it wouldn't create as much boost so would pickup speed gradually
Worth a try and don't cost much for a new set of plugs
10 July 2007, 09:03 AM
#30
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When mine was playing up they thought it was the MAF, changed it and it made no difference.... I ended up driving away again with the issue and taking it elsewhere to get it fixed.