mayhem Member 13 Member For: 19y 24d Posted 23/08/06 10:11 AM Share Posted 23/08/06 10:11 AM hey guys I have a mk2 xr6 ute that has had the centre muffler removed and a flash tune. my concern is on the 10 psi tune when I either a break traction or b rev it to 4500 there is a sudden loss of power and the car sounds like its dropped a cylinder or two, this continues for approx I minute then returns to normal. they mechanic? who performed the tune told me its a collapsing caty converter and I need to fork out 2 big ones for a full exhaust, I aint no mechanic but that dont make sense as the car runs fine on ford tune, my thoughts are is it the tuning or the dreaded valve spring bug or is it overboosting and not getting enuff fuel or. my plugs have been gapped is it possible the spark is blowing out on full boost. anyone else experienced this. im scared and am forced to drive on ford tune which just seems so good damn slow help Link to comment Share on other sites More sharing options...
2fardown Member 526 Member For: 19y 5m 27d Gender: Male Location: Brisbane Posted 23/08/06 10:17 AM Share Posted 23/08/06 10:17 AM Valve springs. He probably suggested replacing the cat/exhaust to relieve some of the pressure, which helps the problem but I'd be fitting new valve springs Link to comment Share on other sites More sharing options...
Eugene Member 670 Member For: 20y 1m 23d Gender: Male Location: Newcastle NSW Posted 23/08/06 10:17 AM Share Posted 23/08/06 10:17 AM dont go back to your "mechainic", he has his head up his ass, not all cars are the same, and your car is one of many that will need to be tuned to suit, install the 8psi map to be safe and save some coin for a custom tune, think long and hard about how much power you want as each tune will cost you $$$, if you think you will want injectors, cooler exhaust etc, do it all at once and save a sh*t load on messing about.the "generic" tunes are suited to STCOK cars only, not cars with cooler, or second CAI or center mufflers removed etc, your car doesnt have a "problem" as such, it just needs to be tuned to suit.Best of luck with it, and welcome to the Nuthouse. Link to comment Share on other sites More sharing options...
MYWPN Donating Members 554 Member For: 19y 4m 7d Gender: Male Location: Bendigo Posted 23/08/06 10:28 AM Share Posted 23/08/06 10:28 AM The valve springs are what is causing your fault though Link to comment Share on other sites More sharing options...
mayhem Member 13 Member For: 19y 24d Posted 23/08/06 10:31 AM Author Share Posted 23/08/06 10:31 AM sorry guys forgot to mention it is a custom tune not the generic 10 psi the car spent 4 hours on the dyno and there was no prob for about 4 months after having it tuned when tuned it made 250rwk but it dont feel as strong now and I dont thrash it much Link to comment Share on other sites More sharing options...
GOLDIE My new toy Lifetime Members 5,344 Member For: 21y 6m 17d Gender: Male Location: stanthorpe wine capital of qld. Posted 23/08/06 10:34 AM Share Posted 23/08/06 10:34 AM Valve springs for sure as has been said they do get weaker as time passes.Where areyou from.Ian Link to comment Share on other sites More sharing options...
mayhem Member 13 Member For: 19y 24d Posted 23/08/06 10:38 AM Author Share Posted 23/08/06 10:38 AM im in sydney my fears have been confirmed spouse any one can put me on to a decnt shop to do the work and not another gold digger Link to comment Share on other sites More sharing options...
SAMSXR6T Member 685 Member For: 19y 8m 29d Gender: Male Location: CENTRAL COAST Posted 23/08/06 10:50 AM Share Posted 23/08/06 10:50 AM I bought my valve springs from nizpro (melbourne) for $275 and paid my tuner $450 to install them. got alot of quotes in sydney from $900 to $1200, u will also need a re-tune Link to comment Share on other sites More sharing options...
jetute Donating Members 4,553 Member For: 20y 9m 7d Gender: Male Location: brisbane Posted 23/08/06 11:12 AM Share Posted 23/08/06 11:12 AM I bought my valve springs from nizpro (melbourne) for $275 and paid my tuner $450 to install them. got alot of quotes in sydney from $900 to $1200, u will also need a re-tune←that's a great price to install.If brissie/coast guys are wanting valve spring installs.... get in touch with goldie on this site... or fist can do it if your in brissie. Link to comment Share on other sites More sharing options...
ford number 1 Donating Members 602 Member For: 20y 2m 10d Gender: Male Location: N/W Sydney Posted 23/08/06 11:29 AM Share Posted 23/08/06 11:29 AM there r a couple of tuners that sponser this website in sydney..I had my valve springs done by Mark at MRC at Castle Hill and my custom tuning done by Croydon Racing at Silverwater and am happy with both.. Link to comment Share on other sites More sharing options...
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