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#1
15-01-2013, 08:15 PM
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overboosting?
Hi guys,
bit a nooby question so please bare with me. my scoob is pretty much standard apart from induction kit and a prodrive exhaust as far as im aware... im not sure how much boost it is suppost to be running but when im giving it some beans it normally sits at 12psi until this morning on the way to work it went to 14psi! Then, thisd evening on the way home, i thought id see if it would do it again, needle went to 14 dropped to 9 then sat at 12 again. any ideas what could cause the boost to change overnight? 
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#2
15-01-2013, 08:20 PM
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Temperature
It's very cold at the moment and this can cause boost spikes. The induction kit can also cause boost spikes but the severity depends on the kit and the year of vehicle fitted to.
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#5
15-01-2013, 10:47 PM
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2013.................
__________________
 ASPerformance 0191-4103770 PELTOR, PFC BRAKES, PAGID MOTUL, FERODO, SPEEDLINE, TRS, MINTEX, PIAA, HELLA, TEIN, WHITELINE, SUPER-PRO, MILLERS OILS online shop!!
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#7
16-01-2013, 10:02 AM
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make sure you haven't over-filled wioth oil as this can be a major cause of overboosting also as it gums up the boost lines, etc........
__________________
ASPerformance 0191-4103770 PELTOR, PFC BRAKES, PAGID MOTUL, FERODO, SPEEDLINE, TRS, MINTEX, PIAA, HELLA, TEIN, WHITELINE, SUPER-PRO, MILLERS OILS online shop!!
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#8
17-01-2013, 01:21 AM
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i checked the oil at the weekend and it was alright so left it alone. im starting to think there may be a boost leak asits dropping to half it would be at full boost then slowly going out to full boost.
Gonna give everything a clean and check at the weekend, see if i can find anything
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#9
17-01-2013, 05:02 PM
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My classic used to overboost to 1.5bar then wind back down to 1bar, could never get to the bottem of it! would the boost solonoid be at fault? when mine overboosted the engine check light used to come on but went off as soon as it dropped bit of a pain as i couldnt get no codes up that way
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#10
17-01-2013, 08:07 PM
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Clean out the hoses that connect the turbo to the blue boost control solenoid with carb cleaner, especially the short hose that connects between the turbo outlet nipple and small white the t-piece. This hose has a small restrictor inside which is easily blocked.
The more blocked it gets, the more boost/boost spike you will get, as it prevents air getting to the actuator. While your there squirt some cleaner through the solenoid and if possible excercise it with a 12V supply while cleaning.
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