Big Supes Posted August 24, 2014 Share Posted August 24, 2014 After running just fine for around 6 months my car started stalling at traffic lights and the idle can be a little unsettled. I also noticed I could no longer hit over 1.1 bar of boost... this has got worse, dropping to 1 bar, and now only 0.9. After reading researching the stalling I was swaying towards the o2 sensor as it was reading 0.3v which would be the cause for running rich and I presumed the ECU could be cutting boost despite the HKS FCD. I've checked for boost leaks, but couldn't find any and I have a new O2 sensor to ready to fit, but just wanted to see if anyone else has experienced anything similar? Something to note, I didn't have any warning lights, although I currently have a variety after butchering off my ABS sensor to replace a wheel bearing. Would be nice to get it sorted before JAE. *UK Spec car* Cheers! Quote Link to comment Share on other sites More sharing options...
Tommyd16 Posted August 24, 2014 Share Posted August 24, 2014 How are the turbo link pipes? They can collapse in side and become restrictive Quote Link to comment Share on other sites More sharing options...
Big Supes Posted August 24, 2014 Author Share Posted August 24, 2014 Haven't checked dude, but will get on it. Thanks for the tip. Quote Link to comment Share on other sites More sharing options...
Nic Posted August 24, 2014 Share Posted August 24, 2014 Check the ECU for stored error codes. A slight drop in boost pressure *may* just be down to the hotter weather, have you tried adjusting your boost controller? Quote Link to comment Share on other sites More sharing options...
Big Supes Posted August 24, 2014 Author Share Posted August 24, 2014 I haven't checked for error codes as no warning light popped up, but will check after I have sourced and fitted the new ABS sensor. It was pulling 1.3bar in warmer weather than what we have now. It also managed the same boost on dude's dyno after a 700bhp Audi S6 had just cooked the entire bay. I have tried turning the gain up to 100% and also the boost from 60% to 100% and no change. Quote Link to comment Share on other sites More sharing options...
Big Supes Posted October 22, 2014 Author Share Posted October 22, 2014 Update.... Parts replaced/eliminated: Turbo link pipes Temp sensor Both O2 sensors The car is still running rich and won't boost over 0.9 bar. I'm back to thinking it's a boost leak or the AFM, but I still haven't found any leaks in the system using water and fairy liquid. Just a quick question for anyone who can help... what vacuum reading are you seeing when idling or shutting the throttle when driving? Quote Link to comment Share on other sites More sharing options...
Benjy Posted October 22, 2014 Share Posted October 22, 2014 Replaced the stock BOV yet? Quote Link to comment Share on other sites More sharing options...
supra_ufo Posted October 22, 2014 Share Posted October 22, 2014 Could it be coilpack connecters? Quote Link to comment Share on other sites More sharing options...
Big Supes Posted October 22, 2014 Author Share Posted October 22, 2014 Replaced the stock BOV yet? Yes mate. Could it be coilpack connecters? Are they prone to go? I've been toying with replacing all the coil packs to rule them out, as they could probably do with being changed anyway. Quote Link to comment Share on other sites More sharing options...
Benjy Posted October 22, 2014 Share Posted October 22, 2014 What plugs are you running? Quote Link to comment Share on other sites More sharing options...
Big Supes Posted October 22, 2014 Author Share Posted October 22, 2014 NGK Iridium. Quote Link to comment Share on other sites More sharing options...
Big Supes Posted October 22, 2014 Author Share Posted October 22, 2014 Any idea what vacuum reading you guys are getting on idle? Quote Link to comment Share on other sites More sharing options...
Benjy Posted October 22, 2014 Share Posted October 22, 2014 Which grade? Quote Link to comment Share on other sites More sharing options...
Big Supes Posted October 22, 2014 Author Share Posted October 22, 2014 Can't remember now dude. Came with the BPU package from Whifbitz so all good for the level of boost I'm running. Quote Link to comment Share on other sites More sharing options...
Big Supes Posted October 22, 2014 Author Share Posted October 22, 2014 Will double check the receipt tomorrow (can't be arsed to get out of bed and find it now). Quote Link to comment Share on other sites More sharing options...
Tommyd16 Posted October 23, 2014 Share Posted October 23, 2014 I think I run -0.6 ish vacumm at idle iirc Quote Link to comment Share on other sites More sharing options...
Tommyd16 Posted October 23, 2014 Share Posted October 23, 2014 Is the hks FCD at the right setting? Number 9 I think? I've also heard of these failing or causing issuea and the greddy bcc is a better option http://mkiv.com/techarticles/bcc/why_bcc/Why_the_GReddy_BCC.htm Quote Link to comment Share on other sites More sharing options...
mellonman Posted October 23, 2014 Share Posted October 23, 2014 you said that the car started stalling and running lumpy right ? is that still the case , coil pack clips are a good shout as often very brittle http://www.mkiv.co.uk/vbb/showthread.php?61141-How-To-Refurbish-coil-pack-connectors other then that how is you fcd fitted ? this needs to be soldered in for a good connection or can give issues Quote Link to comment Share on other sites More sharing options...
Guest Budz86 Posted October 23, 2014 Share Posted October 23, 2014 If it was coil pack clips I'd expect it to be missing at under load, but doesn't sound like it is? Worth checking though, and might as well pull the plugs and have a look at those too while you're there. Quote Link to comment Share on other sites More sharing options...
Big Supes Posted October 25, 2014 Author Share Posted October 25, 2014 So.... I have a cracked weld/seam on the stock IC. Quote Link to comment Share on other sites More sharing options...
Big Supes Posted October 25, 2014 Author Share Posted October 25, 2014 I actually "blew the welds on the intake.". :D Quote Link to comment Share on other sites More sharing options...
Guest Budz86 Posted October 25, 2014 Share Posted October 25, 2014 Perfect time for a front mount then....see my for sale thread! Quote Link to comment Share on other sites More sharing options...
Big Supes Posted October 25, 2014 Author Share Posted October 25, 2014 Haha, as much as a fmic is inevitable, I'm putting off the day when I try and get the active spoiler to play nice with one. Quote Link to comment Share on other sites More sharing options...
Guest Budz86 Posted October 25, 2014 Share Posted October 25, 2014 Just use lots of spacers! I'll send you my PayPal.... Quote Link to comment Share on other sites More sharing options...
Big Supes Posted October 25, 2014 Author Share Posted October 25, 2014 Lots of spacers? Are people making a song 'n dance over nothing or is something desperate to offload their FMIC? Quote Link to comment Share on other sites More sharing options...
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