ok so heres the deal im running a turbo t3/t4 setup with 550cc injectors,a 255w walbro fuel pump,and an emanage ultimate ecu. now the problem is that ive taken it to tune twice already for the first couple of days it runs perfect but after a week the engine starts reving at idle and then after about 2 weeks it starts turning off when cold. so does anybody know some tricks tuning to get rid of this issue?

 

a better tune? I've had my e-manage tuned for a little over a month now, and it runs GREAT! It seems to run better now than before I turboed my car. it idles fine, and runs fine with the A/C on and with Cruise Control on, sometimes at the same time lol. and I have no problems driving wise. I have a turbonetics kit with 440cc injectors. I have put probably 1200 miles on the car in the past month with no issues. I think you just need a better tune. Also, do you have a PNP harness or did you splice it into your stock harness? could be a wiring issue?

 

sounds like you have a vac leak. so what could be happening is you're tuning around the vac leak and then it just catches up with you. check all your vac lines then do a boost leak to see where you're still leaking

 

if it was a vacuum leak would his tuner be able to tune around it? I can def. see a vacuum leak causing a rough idle/ stall, but if there was a vacuum leak from the begining wouldn't that have been picked up by the tuner? How did the car run before you got it tuned?

 

Vac leak for sure or what BOV you running?

 

here is an odd question for you. are you T'd in to the emanages vac source anywhere?

 

i had same problem ended up being a ripped coupler on the intercooler pipe.

paul i have a greddy rs bov any thought on that?

 

^ they leak and they love to do it. i have an RS as well

 

easiest way to notice a vaccum leak, at least imho is to look at ur boost gauge at idle. normally its should be somewhere around 20in/hg, ive noticed if a vaccum line is undone or leaking, that my gauge will read somewhere around 10in/hg. im not saying this is true in all cases, but it may help. generally speaking, vaccum leaks are a real pita to find. good thing is we really only have 1 or 2 vaccum sources so its not as difficult.

 

i have a pnp harness...and my boost gauge reads like 23 at idle

 

im thinking its a vaccum leak to so id have to check my couplers and all that stuff...i have my bov reccirculated would a leak effect it anyway