I have a problem with my car.When i brake at stop the rpm go down to 0 and my car stall.my bov is synchronic blow off valve (synapse engeneering)

what do you think about it

thx

 

brake booster vacuum pump robbing causing engine to die? lol i dont know how our engines work here =P

hows ur idle and what are ur mods, when did this start happening?

 

idle 600-650
mods;greddy twin turbo with a walbro 255 and turbo xs management

one week after tuning.it start to do it

sorry for my bad english

 

go back to wherever you got it tuned and get it fixed, problem solved.

 

it'll die only at idle and when you hit the brakes right?

how about if you're crusing in in netural.. and hit the brakes? does rpm drop?

 

its realy just when i arrive at stop i put on neutral and brake

 

i arrived of my tuner 3 hour ago and he try to resolve my problem but he think that the problem was resolved.but when i return to my home it still stall at stop.i think that the problem is the blow off valve.

 

why would i be the blow off valve? blow off valve runs off is 100% mechanical that is not tied to the brake system?

check your lines to make sure everything is secure? most brake booster uses intake manifold so I'd think thats ur problem? make sure all the lines are secure?

aside from that without the car here that as far as I can go.. hopefully someone else can chime in or bring it back to the shop for them to diag

 

opps just realized my post doesnt make sense..

IMO it wouldnt be your BOV becaue a BOV only triggers with manifold vacuum (when you shutoff the throttle you create some vacuum) and this will let the BOV to release the air between your turbo and butterfly valve to prevent damage to both (air has no where to go and can go as far as destroying the butterfly valve). the air is then vented to wherever you want.

So a BOV wouldnt cause you to drop your idle when the brakes are hit at a stop?

 

This happened to me when I was using a Tial BoV-- The HKS SSQV fixed it.

I thought it was my tune/ecu- And I spent 2500$ on HKS:iS-- which is nice. but was really a waste of money

It's your BOV NOT YOUR TUNE

My tuner put a **** ton of fuel from 0-5% throttle, and it helped... Driving it in tiptronic for me helped too, but the problem was still there

HKS SSQV baby!

 

ok thx

i must change my bov.its the solution to my problem?? or i can do other thing for resolve the problem

 

any reason why it would be the BOV?

 

My reason was it was just open enough to let to much air out and stall me out.

OR the MAF was like WTF LEAKING AIR or something.

DEFINITELY the bov though.

 

i can adjust the spring of the bov??

 

G_owner- If you are still using a MAF, you need to recirculate your Synchronic BOV. It is designed to elminate compressor surge, not to leak boost and give you good throttle response, but it needs to be recirculated after the MAF.