JJW1978 Member 28 Member For: 17y 4m 6d Location: Perth, WA Posted 30/11/13 02:56 AM Share Posted 30/11/13 02:56 AM (edited) Hi guys,I'm pretty sure my BA XR6T has an overboost problem, or at least this is what the mechanic is telling me. They've had it for 3 days and can't determine what is causing it. I don't know too much about turbos so I'll try and explain as best I can and hopefully someone here might be able to help.The car drives fine when driven normally, however there is a shuddering and slight backfire at 2500-3000rpm. The mechanic has tested the car with gauges and there's nothing wrong with the fuel pressure however there is 20psi of boost when this shuddering happens. The computer errors he gets is consistent with a wastegate problem but he says that it's working. He can see the "pin moving" on the side of the wastegate, although he says to really see if it's working he needs to take the turbo out. He doesn't think the wastegate is the problem.All the plugs, coils and cables are fine. They thought they fixed it the other day but they had blown a hose off the turbo. He's been talking about putting hoses in with loops to control the boost going to the turbo but this sounds like a patch up job. The only thing they can think of is something electrical. I explained the problem to a friend and he said it might be the ECU.The car had a hole in the inlet manifold gasket recently as well, and it was after I got that fixed that I really started to notice this overboost problem.Is the mechanic over his head because I start to get worried when mechanics don't know what the problem is. They tend to start replacing everything they can hoping that'll make a difference.Any help would be appreciated.Thanks,James.PS: who would be best to take the car to if the mechanic can't do the job? Edited 30/11/13 03:00 AM by JJW1978 Link to comment Share on other sites More sharing options...
Pazzo Donating Members 11,132 Member For: 14y 3d Gender: Male Posted 30/11/13 03:11 AM Share Posted 30/11/13 03:11 AM First off what state you in? Also send it to one of the forum sponsor's on here... Not hard to find them.... If in Vic go see Pitlane 1 Link to comment Share on other sites More sharing options...
JJW1978 Member 28 Member For: 17y 4m 6d Location: Perth, WA Posted 30/11/13 04:42 AM Author Share Posted 30/11/13 04:42 AM I'm in WA. Link to comment Share on other sites More sharing options...
jas98 Member 1,030 Member For: 12y 3m 2d Gender: Male Location: Maryborough Qld Posted 30/11/13 05:02 AM Share Posted 30/11/13 05:02 AM he says the pins moving on wastgate.....is he sure its moveing all the way? do you have a aftermarket tune?have you upgraded exhaust? deleted cat?boost solinoid can caus this but I doubt up to 20psi? Link to comment Share on other sites More sharing options...
JJW1978 Member 28 Member For: 17y 4m 6d Location: Perth, WA Posted 01/12/13 04:28 AM Author Share Posted 01/12/13 04:28 AM he says the pins moving on wastgate.....is he sure its moveing all the way? do you have a aftermarket tune?have you upgraded exhaust? deleted cat?boost solinoid can caus this but I doubt up to 20psi?He said that to check if the wastegate is opening properly he has to take the turbo out, big job apparently. He "thinks" it's working ok.No aftermarket tune. Standard exhaust and cat is still in. The car is fully stock.Mechanic says he's tested all the mechanical things he can and they're all working properly. I have the car back this weekend and it's running a lot better. Overboost doesn't kick in now until 3500rpm and the shuddering is no where near as bad. There is a fluttering sound now when I back off at high boost that wasn't there before.I'm thinking he's just in over his head. I'm trying to fix all the little bits and pieces so I can sell it and this guy is just scratching his head about this. Very frustrating. Link to comment Share on other sites More sharing options...
JJW1978 Member 28 Member For: 17y 4m 6d Location: Perth, WA Posted 04/12/13 11:32 AM Author Share Posted 04/12/13 11:32 AM Well the mechanic has succeeded in blowing my engine up in his attempts to find a solution.any advice for suing an auto mechanic? Link to comment Share on other sites More sharing options...
jacobmitchell92 Donating Members 370 Member For: 13y 6m 15d Gender: Male Location: Perth Posted 04/12/13 11:48 AM Share Posted 04/12/13 11:48 AM Take it to Monsta Torque in Malaga, Rob knows his stuff! If not where abouts in wa are you? Link to comment Share on other sites More sharing options...
matsfgxr6turbo Member 388 Member For: 14y 8m 19d Posted 04/12/13 12:12 PM Share Posted 04/12/13 12:12 PM Maybe take your car to someone good like monsta torque cheaping out on workshops that don't know these cars will cost you an engine is your car a ba by any chance? Has it done a leg out of bed? Link to comment Share on other sites More sharing options...
jas98 Member 1,030 Member For: 12y 3m 2d Gender: Male Location: Maryborough Qld Posted 04/12/13 01:32 PM Share Posted 04/12/13 01:32 PM im still gonna say I reken it was the actuator... Link to comment Share on other sites More sharing options...
Pazzo Donating Members 11,132 Member For: 14y 3d Gender: Male Posted 04/12/13 07:13 PM Share Posted 04/12/13 07:13 PM Well the mechanic has succeeded in blowing my engine up in his attempts to find a solution.any advice for suing an auto mechanic?Yikes!!!!!! Link to comment Share on other sites More sharing options...
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