BMXBYKR

Hey fella's. Well since my last dyno tune I've upgraded to the following:

DW 65c

ID 1000 inj

IPT top feed conversion with line kit

JDM TGVs

BNR TD-06 20g

FMIC

38mm EWG setup

Perrin Turbo inlet

Greddy BOV full atmo

There's a whole mess of other things I've done but are irrelevant. So after the installs, I brought it down to Dave at Cryotune. He did his smoke test and found some small leaks. Anyways when we attempted to do the road tune he couldn't figure out what was causing the stumbling/hesitation effects. He went through all of hi parameters and said the only thing he could find was that the fuel pressure was inconsistent. Not is exact words mind you.

So after trailering the car home, I let the car sit for awhile, and about a few weeks later I finally get the chance to do some more troubleshooting. That's when I read about the fuel line and FPR swap. So I bought the FPR kit, installed it and still have the stumbling effect except that it dropped to between 2000-2500 vs the 2500-3000rpm range initially.

I'm wondering if I should see if it gets tuned out after I retune it or to just go ahead and get longer fuel lines too beforehand.

I wanted to report that I had severe stumbles in the 2000 to 2500 rpm range. I changed the fuel pressure regulator to the 2007 STI setup, and this cured my problem. It is so much smoother, more power all over. I would say it is 90% cured. I will now have a final tune by Dave of cryotune, and let you know the results after that. I wish I had done this change years ago. My car is a 2005 LGT 5spd Wagon, with stock turbo, custom tune, up pipe, downpipe, intake and rebuilt engine with forged pistons. Thanks so much to the people that figured this fuel pressure issue out, and posted it here.

Turbotwin, after you did the regulator swap and before the retune, was there still a flat spot/stumble?

I'm asking because initially my stumble was between 2500-3000rpm. Now since I've removed the three stock regulators and installed the IAP FPR kit (http://www.iaperformance.com/product_info.php?products_id=3155) the stumble moved to 2000-2500rpm. Will it go away once it is retuned? I'm hoping that I don't need to keep trouble shooting and buying parts.

Just got my Pro kit within 2 weeks too, installed it late this morning. Took about an hour, and biggest problem for me wasn't removement or installation.

For some reason when I tested it, the volume and intensity of any song dropped drastically when I increased the volume on the headunit past 20. Any ideas? I reopened the radio, reversed the audio connectors thinking maybe, just maybe (doubting this) that this would fix it. Nothing. Everything is back together, just now hoping to find an answer to this.

Also plugging the ribbons in is not difficult either. I think its very straight forward. Look at the female side connector on the radio board and aux board. Whichever side the pins are on, is the ame side the ribbon contacts will go.

Really wish I ordered this years ago. Next mod will be the jdm dual din. Can't wait.

Thank you Dan for putting all the time and effort into making this information readily available. Of course there will be questions, and as I have read this and other threads, I still have concerns.

Here's my concern. I'm mounting 18x9.5 et38 wheels with 245/35s and as a roll.pull will be made, I still havent been able to figure out whether I need better struts with my Cobb springs, or just go coilovers. I don't necessairly need the height adjustment all the time, but I need a better ride, and I occasionally pull a motorcycle/utility trailer with several bikes loaded and as of now with my stock struts and Cobb springs, the rear tires can't even be seen. The car pulls whatever with no problem, but my suspension is suffering and I'm not exactly sure if I spend $1k on coilovers if that will be the best option or not. Would I need lateral links, rear camber bolts, butt shims, etc. I am on a budget and can't throw money around with my lacking military check. I also DD this and travel with the family in it. I don't want them suffering from an uncomfortable ride either. Thank you in advance to anyone that takes the moment to help me out here, it is and will be very much appreciated.

I went to the CUSCC Show, here is a little video I made.

Nice videos you've made.

Got you both beat.

http://www.rimsntires.com/rt_specs.jsp

Yeah this is a very nice tool, in fact I just referred to it today. Thank you so much!