Gorge XR6T New Member 4 Member For: 1y 11m 28d Posted 22/04/22 02:09 AM Share Posted 22/04/22 02:09 AM Hey, looking for some help with my 2008 fg xr6t. Was driving home a few months and all of a sudden car sounds like its had a hole in the exhaust coming from around the turbo. Pulled the turbo off it and discovered some of the bolts clamping the exhaust turbine to the core were loose and 1 bolt had completely fallen out which was what the hole in the exhaust was. Replaced the bolt and put the turbo back and it sounds normal, but now it is really down on power and only boosting to about 3psi (car has been tuned to 14psi). Went over everything, checked there was no leak in the intercooler piping, checked the wastegate wasn't stuck open and functioning as normal, checked the boost solenoid was working properly and boost lines weren't blocked. Turbo still spins freely and there is almost no play in the shaft and not touching the housing. Went and pulled the turbo off again and discovered that now the inside of the exhaust side is white! I'm wondering if maybe the cat converter could be blocked and that is stopping the turbo from breathing but it just seems odd that the problem started as soon as I had put the turbo back on. Anyone had anything similar happen? Any help would be appreciated. Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,291 Member For: 16y 9d Gender: Male Location: Melbourne Posted 22/04/22 03:02 AM Share Posted 22/04/22 03:02 AM Probably a boost leak post the turbo; I'd check the intercooler piping etc that you would have had to remove to remove the turbo... but it's easy enough too unbolt your cat and see if it's blocked, too. Link to comment Share on other sites More sharing options...
Gorge XR6T New Member 4 Member For: 1y 11m 28d Posted 22/04/22 03:21 AM Author Share Posted 22/04/22 03:21 AM Yea already checked all piping post turbo and its fine Link to comment Share on other sites More sharing options...
k31th less WHY; more WOT Site Developer 28,291 Member For: 16y 9d Gender: Male Location: Melbourne Posted 22/04/22 03:22 AM Share Posted 22/04/22 03:22 AM have you done a pressure leak-down sort of test on the intercooler piping? checked for any leaks around the exhaust manifold, dump etc? Link to comment Share on other sites More sharing options...
Gorge XR6T New Member 4 Member For: 1y 11m 28d Posted 22/04/22 03:44 AM Author Share Posted 22/04/22 03:44 AM Yea I blocked off one end of the intercooler piping and hooked up a bike pump to the other end and pressurized it to about 20psi and there was no leaks anywhere, and have gone over every nut and bolt on the dump/turbo/manifold and they are all tight/ not leaking. I'm thinking taking the cat off and having a look is probably the next step Link to comment Share on other sites More sharing options...
Gorge XR6T New Member 4 Member For: 1y 11m 28d Posted 24/10/22 11:58 PM Author Share Posted 24/10/22 11:58 PM (edited) Just an update in case anyone else has a similar issue, it was a blocked cat that was the problem, (pic of cat below). Didn't even need to replace the cat, just cut bad section out and left good section in there. Edited 25/10/22 02:24 AM by k31th fixed pic 1 Link to comment Share on other sites More sharing options...
hjtrbo Bronze Donating Members 309 Member For: 13y 3m Posted 25/10/22 05:29 AM Share Posted 25/10/22 05:29 AM Unreal. Link to comment Share on other sites More sharing options...
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