boost fluctuation
27 March 2011, 04:49 PM
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boost fluctuation
Hi all, right my car has been fine after being mapped but yesterday I fitted a new clutch, I now have a big boost fluctuation. The boost is all over the place, up and down more so in 4th gear, if I let my foot off in forth then put it back down u can feel boost for a split second then the car cuts all boost ( not fuel cut ) then gradually gains boost and then fluctuationagain. Now I dont understand how fitting a clutch could be related to the problem, so I checked all boost pipes to make sure nothing has been knocked or come off, but all is fine... help please.......
27 March 2011, 09:24 PM
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I don't like gauges, I no its boost as I've felt it before and owned 20+ turbo cars, and being a mechanic kinda helps. I've checked everything so now I'm baffled.
27 March 2011, 09:27 PM
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had boost problems similar to this, turned out to be failing coil pack. was fine if i feathered in the power but occurred when opening throttle full quickly? similar??
who mapped the car may be worth getting them to have a look
who mapped the car may be worth getting them to have a look
Last edited by m@t STImulation; 27 March 2011 at 09:32 PM.
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27 March 2011, 09:37 PM
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I've had the same issue before myself, issue was the previous map, wastgate jury needed adjusting, just weird how it was fine until I fitted the clutch.
27 March 2011, 10:07 PM
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27 March 2011, 10:18 PM
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You could of got it there Simon... the clutch is better than ever now. I did only feel it slip once so I replaced it, but as you say it may of been slipping for a while but not noticeable hhhhmmmm now that would make more sense to me.
27 March 2011, 10:24 PM
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it is very difficult sometimes when you get to the limits of the clutch, sometimes they let go and it is an obvious rev to redline etc and sometimes they just slip a tiny bit..
sounds like it was slipping when mapped and needs an adjustment.
Simon
sounds like it was slipping when mapped and needs an adjustment.
Simon
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