Ka-t doesn't want to idle, but fires up easy.

[spooled240]

hey guys it has been pretty exciting lately now that I am finally boosting with my s14. The other day I took it up to 12 psi but still runs rich due to exhaust leaks (i think). So it fires up right away and holds it at 1200 rpm for a second then the tachometer needle jumps up and down from about 1000-200rpm then stalls. My bov, which I expect is the issue, is about a foot away from the tb (on the coldpipe) and is a GReddy type RS. I tightened it all the way but still not one difference with idle issues. The car is running really rich which might be a problem w/ O2 sensors...idk

any help would dothanks

[S13FX]

Can you give us a lil more insight on your setup.

Like what kind of Injectors do you have, your tuning method, do you have a wideband, etc etc...

Thanks,Mike

[Afliction523]

MAFS Maybe?? Whats your setup?

[eazye2000]

Maybe your BOV is getting sucked open and allowing unmetered air into your engine. ? I just woke up.... So there's my brilliant s*** for the day.

[spooled240]

I have 555cc nismo injectors, z32 mafs and a jwt ecu.The injectors, mafs and ecu ran perfect when I drove it n/a for 2,000 mi, so I think the problem is the turbo mods:-either the o2 sensor's are not getting a clear reading because my downpipe has an open hole (1.5") for the wastegate recirc. (it's really loud! )-bov: either stuck open, etc.When I give it gas to keep it from stalling in the low rpm ranges, it fires on all four but chugs black smoke.

[S13FX]

Is you BOV recirculated, it definitely sounds to me like you have a vacuum/boost leak somewhere.

[spooled240]

Well I just disconnected the bov and started the engine, which still chugs thick smoke and stalls. I gave it a few good revs and heard the engine missing(sorry, i know this is not what I said earlier) as if it were being flooded with fuel . Do you think eliminating the exhaust leaks would solve the issue with the a/f mixtures? BTWall my vac. lines and the fpr are all stock.i'm not running a wideband, just the bov and the boost gauge.egr valve disconnected but still mounted on intake.thanks again

[S13FX]

Which exhaust leaks are you exactly talking about?

[spooled240]

here is a shot of my bov. The hoses you see that are disconnecter were always connected before the tb so I don't think it matters if they are disconnected (correct me if i'm wrong). I know the engine bay is still looking like a halfa** turbo project lol but it's in progress.[IMG][/IMG] There are exhaust leaks are near the downpipe, i didn't connect the wg dump tube to the downpipe, so there's an exhaust opening (1.5") on the downpipe

[Florida240sx]

My ka-t idles fine with no exhaust when coming to a stop I sit there for about 20seconds trying to get it to hold idle but it will hold..Just your exhaust leak and your rich fuel condition is your problem....

[j-z]

yeah your IACV (idle air control valve) hose is not hooked up. that is allowing unmetered air into the motor causing your rich condition. i had the same problem with mine cept i couldnt even drive mine. im surprised youre able to drive it. just weld a nipple onto the pipe thats going right in the TB and youll be good.

[S13FX]

Below I attached your picture with to red arrows, the arrows show just incase where you have to take the hose you have thats unhooked and where is a good idea to hook it up on the IC pipe.

I would Also take the BOV and recirculated it, since you don't have anything to correct for the escaped air when it goes off.

[Florida240sx]

Where is your pcv valve going to off the valve cover?

[spooled240]

Thanks guys, lots of help I'll hook that hose up and see how it runs.

Where is your pcv valve going to off the valve cover?

it's open/disconnected, just can't see it from the pic angle.

[j-z]

yeah i would also put your maf where your bov is if you want to run open atmosphere. then just find a place to put your bov on the hot pipe. it will run fantastic once you get it running.

[spooled240]

I connected that idle air controle valve and it now holds the idle @ about 800rpm which is nice. I can hear the engine miss once in a while, so I might install some cold spark plugs which will probably make it run even better.The other day I was taking my car out for a spin and I was rolling to a stop sign, so I popped it in nuetral. The rpms went from anout 3,000 to 500, then stalled. When I tried to start it, wouldn't fire up. Took me about 10 sec straight before it slowly started up. ignition? timing?

yeah i would also put your maf where your bov is if you want to run open atmosphere. then just find a place to put your bov on the hot pipe. it will run fantastic once you get it running.

Yeah I'm planning on it

[j-z]

that would be because of your bov setup.... run blow through and shell run perfect.

[Florida240sx]

It happens car gets too much fuel and stalls out... Either blip the throttle to save it, or change your setup. If it stalls someitme holding the pedal to the floor fires it back up better...

[spooled240]

yeah I sort of feather the throttle to keep it from stalling, but I agree that my bov is the issue. I'm gonna relocate it on the hotpipe and recirc. Does it matter whether the recirc hose goes before or after the maf?thanks

[j-z]

just run a blow through setup...

[Afliction523]

Thats the problem I had. How far away is your mafs from your turbo. Also another thing you can do is give your iacv a few turns to the left. My ka-t idles at about 800rpm now, but will not stall since I have moved the mafs and adjusted the idle a bit. There are a few posts on ka-t.org about it.

[spooled240]

heres a pic...



my mafs might not be far enough from the turbo inlet. Still looking at my options whether to go to blow through or try something else. I did some searching and found that a blow through set can damage the maf over time but allows the bov to be vented to the atmosphere no problem.

few more pics of my s14I'm gonna ceramic-coat my downpipe this wk hopefully and finish the exhaust system should sound sweet!

[S13FX]

Just recirculate that bov. I have seen those recirculated before not too much of a hassle and it's the quickest simplest way to fix your problem.

[Afliction523]

Nice work, gotta love the ka-t

[j-z]

i wouldnt neccesarily say that.... hes already got the coupled in bov adapter. all hed have to do is cut a section out of his hot pipe and put it there. put the maf where his bov adapter use to be and youre golden.

mine...





in this pic you can see my maf at the bottom of the pic... exactly where you should put yours. ask rn240sx if hes had any problems with his blow through setup hes been running for a well over a year now, prob two. i never had a problem with mine either for the 10k miles i drove it like that till i sold it

[Florida240sx]

JZ hit me up I need to do some polishing... Should of given my your injector caps lol.I have my car idling at 1200rpms... to help keep it from stalling.