Rive_mk2 Member 62 Member For: 7y 11m 27d Posted 23/04/20 10:24 AM Posted 23/04/20 10:24 AM Hey guys.. I have an 07 BF mk11 xr6 turbo it's stock but with dyno tune and no cat.. when I hit boost in 1st and second it's fine but when I'm in 3rd gear at 4000+rpm the car just looses all power and starts to really idle rough and comes good again once cars turned off and on.. what possibilities could this harbour?
k31th less WHY; more WOT Site Developer 30,109 Member For: 18y 5m 18d Gender: Male Location: Melbourne Posted 23/04/20 10:46 AM Posted 23/04/20 10:46 AM tune probably
Rive_mk2 Member 62 Member For: 7y 11m 27d Posted 23/04/20 10:48 AM Author Posted 23/04/20 10:48 AM Yeah that's what I thought. Wouldn't be fuel pump or anything?
k31th less WHY; more WOT Site Developer 30,109 Member For: 18y 5m 18d Gender: Male Location: Melbourne Posted 23/04/20 10:58 AM Posted 23/04/20 10:58 AM can't think of anything mechanical it'd be if it fixes itself after you cycle the ignition.
arronm Dropping a turd Legacy Donating Member 9,520 Member For: 18y 11m 1d Gender: Male Location: Perth Posted 23/04/20 12:21 PM Posted 23/04/20 12:21 PM (edited) Its likely valve springs Edited 23/04/20 12:22 PM by arronm 1
Rive_mk2 Member 62 Member For: 7y 11m 27d Posted 23/04/20 12:26 PM Author Posted 23/04/20 12:26 PM How much would valve springs be? It's just thrown a check engine light after I showed my friend what it's doing.. would valve spring fault show on scan tool and would it cut out in 1st and second pulls not just 3rd? Thanks again
k31th less WHY; more WOT Site Developer 30,109 Member For: 18y 5m 18d Gender: Male Location: Melbourne Posted 23/04/20 12:28 PM Posted 23/04/20 12:28 PM valve springs cause rough idle after you've just had a breakdown up in the boost ranges or even sometimes if you've thought boost ranges was OK then if it idles rough straight after then fixes itself after a moment of simple driving... so it might not be valve springs, based on what you've said.
Rive_mk2 Member 62 Member For: 7y 11m 27d Posted 23/04/20 12:31 PM Author Posted 23/04/20 12:31 PM It'll go from 4,000+ rpm to barely an idle.. I have to pull over and turn car off then start again then it drives fine until again 3rd gear 4k rpm just doesn't like it and shuts down and now thrown a code. Spooky
k31th less WHY; more WOT Site Developer 30,109 Member For: 18y 5m 18d Gender: Male Location: Melbourne Posted 23/04/20 12:33 PM Posted 23/04/20 12:33 PM should happen straight after a 2nd gear pull then slow down to idle and it should be a bit rough... that's a sure sign of valve springs being soft.
Rive_mk2 Member 62 Member For: 7y 11m 27d Posted 23/04/20 12:36 PM Author Posted 23/04/20 12:36 PM Yeah it does you're right.. if I go sequential mode and give boost in first and a bit in second as I come into third it Goes to sleep. My examoles before was rolling on boost ib third.. how much for springs one would say? 4 or so hundere.. are they hard to fit?
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