Sukhy Posted August 4, 2015 Share Posted August 4, 2015 Gents looking for some info on what to check. The car drives fine from cold and even after 20mins or so into a journey, the car boosts fine to the redline in all gears. However, after about a 30 - 45 mins drive it seems to hold back slightly (2 shunts) from 5K RPM to redline. If I turn the car off and on again (i.e. petrol station scenario) and it's still warm, it boosts fine again for a short period of time before I get the hesitation again. Any ideas on what could be causing this. Car is a 94 TT6 BPU running 1.2 bar. Coilpacks (new Whifbitz ones), spark plugs, coilpack clips, boost pipes have all been checked and replaced. Quote Link to comment Share on other sites More sharing options...
Sukhy Posted August 5, 2015 Author Share Posted August 5, 2015 Anyone have any ideas? Could the ignitor cause such symptoms? Quote Link to comment Share on other sites More sharing options...
TheTurtleshead Posted August 5, 2015 Share Posted August 5, 2015 Lots of people have a had problems with Whifbitz coil packs recently. Tony TT bought some, had issues and swapped them for oem one's almost straight away. As you're BPU especially, it sounds like break up/loss of spark @ high rpm that's causing your problems. Quote Link to comment Share on other sites More sharing options...
TheTurtleshead Posted August 5, 2015 Share Posted August 5, 2015 Lots of people have a had problems with Whifbitz coil packs recently. Tony TT bought some, had issues and swapped them for oem one's almost straight away. As you're BPU especially, it sounds like break up/loss of spark @ high rpm that's causing your problems. If you're not far away from Leicester, I have a spare set of oem packs you could try. Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted August 5, 2015 Share Posted August 5, 2015 If that turns out to be the issue I have a brand new OEM set for sale in the for sale section. Quote Link to comment Share on other sites More sharing options...
Sukhy Posted August 5, 2015 Author Share Posted August 5, 2015 Thanks fellas. Turtlehead I'm near Wolverhampton so may take you up on that, cheers mate. I did think it could be coil packs so bought the new Whifbitz ones going on Pauls recommendation on them but it still retained this hesitation once changed hence me thinking it is something else. IIRC Tony still had the issue after changing to OEMs and found it to be the mapping? Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted August 5, 2015 Share Posted August 5, 2015 Thanks fellas. Turtlehead I'm near Wolverhampton so may take you up on that, cheers mate. I did think it could be coil packs so bought the new Whifbitz ones going on Pauls recommendation on them but it still retained this hesitation once changed hence me thinking it is something else. IIRC Tony still had the issue after changing to OEMs and found it to be the mapping? Do you have an AFR gauge?? It could be the mapping and the ECU pulling timing briefly. I had the same issue on mine after changing the fuel injectors and it was overfulling that much that even with the compensation on the Syvecs it still could not pull enough fuel out. AFRs were into the 10s causing knock and timing to be pulled. Quote Link to comment Share on other sites More sharing options...
Sukhy Posted September 14, 2015 Author Share Posted September 14, 2015 Just to put a bit of closure to this thread, mine turned out to be a fuel pump failure. I had a Bosche 044 pump in there now just under 6 years and it was failing when warm. Replaced with a Walbro and all is ok now. Quote Link to comment Share on other sites More sharing options...
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