Car Stalling After Blitz BOV installed

[Twinkie]

Hi all. I tried searching and checked the other threads but i am still unclear about this situation.

I have an Sr20det redtop with stock injectors, stock everything except for after market intake filter and koyo radiator and a walbro fuel pump. Im using 10w30 royal purple.

So i received my Blitz SS blow off valve the other day and i was excited to put it in. After reading up on how to replace the stock recirculation valve, i then attempted installing it.

what i did was took the recirculation valve off, plugged the two hose with a bottle cap into the smaller hose (that leads to the recirculation valve into the intake), and a D size battery into the larger hose (which leads to the hotpipe). I then plugged up the plug which the recirculation hose is inputted. then i plugged the hose fromt he throttle body to the nipple of the blow off valve. I then made sure that the bolt on the BOV was tightened adjusted all the way down.

As i read in a thread, i thought i did it correctly.

When i started the car, the car idled fine! I was like "sweet! no poblems!". i reved the car a bit listening to the cool sound and then after, did a test run.

turns out, when driving, i would accellerate while the BOV went "PSSSH!!!" but then when i decellerate, i notice the idle dropping hella quik. and when i go at a complete stop either at a stop sign or stop light, my car dies and i constantly have restart my car everytime. the car stalls everysingle time!

so tell me, do i HAVE to re-install the recirculation valve and free up it's hoses? if so, what would i have to do with it's nipple? did i do something wrong?? if there is a way around it without having to run with the recirculation valve and he blow off valve, how can i do this? HELP!! :confused:

[chickentendah]

i reved the car a bit listening to the cool sound and then after, did a test run.

turns out, when driving, i would accellerate while the BOV went "PSSSH!!!" but then when i decellerate, i notice the idle dropping hella quik. and when i go at a complete stop either at a stop sign or stop light, my car dies and i constantly have restart my car everytime. the car stalls everysingle time!

You are dealing with two problems here:

1) Improper operation of blow off valve

2) Venting of metered air to the atmosphere
-------
(1)
You shouldn't be blowing off WHILE accelerating. Your blow off valve is supposed to stay shut under acceleration+boost and only open up when your throttle butterfly closes by letting off the gas pedal. Verify that you installed the blow off valve correctly, and that you have used the appropriate vacuum signal. If you are 100% sure that the install is correct, you might have set your tension rating way too loose-----your bov can't hold the boost.

(2)
Your car will have a tendancy to stall by going straight to idle (by riding the clutch or going into neutral) after blowing off metered air. This happens due to the excessively rich condition. You have three options here:

A) Change your driving habits so you don't spend lot's of time idling. If you're spinning your CAS it's impossible to stall. If you ever find yourself stalling while going at freeway speeds, don't worry. Simply shift into the appropriate gear and slowly engage the clutch. It's the same concept as push-starting a car with a dead starter.

B) Go purchase electronics that compensates for blow off valves.

C) Recirculate your Blitz. If you want to go this route, read my thread here:

http://www.nicoclub.com/zerothread?id=95819

If you're concerned of losing the sound, have no fear. I'm recirculating my Blitz bov, and the thing is still loud!

[Twinkie]

yo thanks for the reply man. recirculation the BOV sounds like a pretty good idea...but i wanna try other routes before i gotta do that jsut because hah.

oh yeah...sorry for the misunderstanding, the blow off valve is functioning correctly, i didnt mean it blew while accelerating. it blows after each gear.



2) Venting of metered air to the atmosphere

B) Go purchase electronics that compensates for blow off valves.



I dont quite understand what "2) Venting of metered air to the atmosphere" means.

also, if i go with buying electronics that compensate for blow off valves, what would i need to buy?

thanks again.

[wootwoot]

it means that the computer thinks there is air thats there, butttt there isnt. You are sending that air into the atmosphere. The computer thinks the air is there so it is throwin fuel at ya to keep you where you are suppose to be but there isnt as much air as it thinks. So you run rich and then you stall. Recirculation of the bov needs to be done or you can run a blow through MAF which can be somewhat complicated and cause your MAF to die if you get any oil on it from an aging turbo.

[chickentendah]

what he said...

If you wanna get electronics to "fix" the stall problem, here some available units:

Apex'i Super AFC
Greddy E-manage ("anti-stall" extra feature)
HKS Super AFR (eids feature available at the flip of a switch)
HKS EIDS (not a fuel management unit; it only corrects sudden fuel imbalances)

If you're certain you wanna go this route, prepare to shell out some extra cash. These electronics can be a waste of $$$ if you won't be utilizing their main features.

[kazuo]

The problem is a combo of #2, and #3, which was neglected.

3) Blitz blow off valves are garbage. Get another one.

I had the idle problems even when it was RECIRCULATED. Switched back to stock recirc, NO problems.

[Twinkie]

I already bought my Blitz BOV and its done for (got it for pretty good price too). im a very low budget guy and cant afford them better ones.

Would it work if i reinstalled the stock bypass valve, and T'ed the hose fromt he throttle to my blitz BOV AND the bypass valve and clear the recirculation hose?

I heard of people running both BOV and Bypass valve, but wondering if it would affect the sound much, and if it would ruiin the purpose of having a blow off valve.

[sr240mike]

It sounds like you are only worried about sound and not too worried about performance. You can have either a bov or recirc valve but dont run both. To cure the stalling you could just blip the throttle on decelleration and the car shouldnt stall, thats what I do. Or you could do it the right way and get the recirculation kit for the hks ss for about $45 (no more cool bov sound though).

[Blues13]

I have a Blitz SS BOV, going into the atmosphere .. Run's fine for me. The idle does drop a little when I decelerate quickly but has never stalled on me, ever. Try playing around with your tension spring.

Maybe you also have a weak spark.. you could try checking your plugs to see if they're fouled or worn.

[Twinkie]

with blow off valve's, the tighter the tension spring is, the quieter and less air blows right? because i notice that when i adjsut the spring almost all the way down, the bov doesnt blow unless i rev higher and its a lot quieter than when the tension was looser.

[chickentendah]

I already bought my Blitz BOV and its done for (got it for pretty good price too). im a very low budget guy and cant afford them better ones

Do yourself a favor and keep the Blitz BOV. Electronics is a waste of $$ if you're only going to use it to correct fuel imbalances. If you love the unique Blitz sound, then why not keep it? Besides, do you really want to settle for anything else such as bird squeeks and laser-gun-shots?

Although the Blitz BOV was designed for atmopheric release, it works just fine for me. Read my thread in the link I gave you above. All you need is one day to recirculate your bov, and it's inexpensive.

EDIT: "fuel imbalances" due to blowing off; tuning is another story

[Dutchmalmiss]

i have a blitz bov that's unrecirculated and it works fine because i tighted the tension a tad. it doesn't go PSSHH anymore, it goes tss tss tss tsssss. but i plan to recirculate it later. haha. i love the sounds.

[Pepperoni]

i have a blitz bov that's unrecirculated and it works fine because i tighted the tension a tad. it doesn't go PSSHH anymore, it goes tss tss tss tsssss. but i plan to recirculate it later. haha. i love the sounds.

are you sure what you're hearing is the bov and not compressor surge? Compressor surge sounds like the sound you described. :bite:

[Dutchmalmiss]

i'm pretty sure it's the BOV because it's where the sound is coming from. other people checked for me and they also said it was the BOV. is it a bad or good thing?

[terribleone_t1]

i have a "hks eids pro" for sale brand new. if your intrested. look it up in the search under hks eids pro

[SilviaNinja240]

The problem is a combo of #2, and #3, which was neglected.

3) Blitz blow off valves are garbage. Get another one.

I had the idle problems even when it was RECIRCULATED. Switched back to stock recirc, NO problems.


I like Blitz BOV *cries*
no probs w/mine

[viscid240]

I like Blitz BOV *cries*
no probs w/mine

me too :rawk: