KA-t won't idle issue

[ship2236]

Basically when the car sits, I can start it, it will idle at about 1100rpm for a few seconds, then it drops to about 5-650 and dies. If I feather the throttle it will stay on for a bit longer but still idles very ruff, and if given to much gas it falls on it's face completely. Basically I can't even move it from one spot to the other.... All vacuum lines have been checked n are fine, fmic and all piping is tight no leaks, z32 maf is still working and I hear the fuel pump running(walboro)... Could it be an aic valve sticking or would that only be an issue If the car actually warmed up and idled after a few? Also plugs r new..... I'm pretty lost so any input is apreciated!:hyper:

Updated:

Here's a vid of the issue. Not the beat quality but u can see how it cuts I'n n out and runs terrible. Plz read further post before posting to keep from saying the same things other members have said. There is a huge checklist poste of what I've already changed/done/dreamt of...

http://i143.photobucket.com/albums/r134/steveship56/42188b20.mp4

Any help is appreciated. The person who helps figure this problem will be awarded a brick of whatever brew they drink( a long as they r local... NO SHIPPING!) lol

[ship2236]

Dbl post sorry. Mod plz close

[Pro ViZIon]

What fuel injectors are you running?

[ship2236]

Sr 370cc's

[240sxrb25]

since it was turboed you are running a hose from IAC to your intercooler piping right?

[ship2236]

Yes I am....

[Pro ViZIon]

I know it might seem stupid but is the manifold sealed good. Happened on my RX-7.

Also have you checked the ecu for any codes?

If your a member of ka-t.org I would throw this on there as well. Probably get more/better advice there.

[ship2236]

Yea I'm on there aswell. Havnt posted it yet though. The mani is good and no codes. I thought it might have been a failed fuel pump so I replaced that and still the same issue so I am at a lOss

[Pro ViZIon]

Just like me haha.

[ship2236]

Yea man it's crazy. Had an issue about 2 weeks ago and where tge car was doing the same thing and it ended up being a cuppler on the ic piping that cane loose and was leaking. Fixed that n it ran tits. That's not the issue now unless I'm blind lol cus everything has been gone through thoroughly.

[Pro ViZIon]

definately throw it on KA-T.

I cant wait to turbo this motor but that will be at least a year from now.

[Pro ViZIon]

Have you figured it out man?

[ship2236]

Nah man I just did a boost leak test about 2hrs ago. My egr blockoff plate had a small leak and so I fixed that, and also there is a leak from the injector o-ring on cylinder 1. Nobody has them right now so I have to wait to fix that issue. But other than that the car still falls flat on it's face right before it reaches boost, but there's pressure building cus tge bov is still doing it's job

[Pro ViZIon]

Will the o-rings from the ka 270's fit the sr 370's? Cuz I know oriely sells them.

[ship2236]

Yea they fit... Called oreilys, Vato Zone, and pep boys n they all say special order BS lol. But would tht o-ring really cause this bad of a prob? I've had boost leaks that seemed way worse n didn't run this bad....

[s13-ghost]

^ yes it does. i had dat problem for a while chek for vacuum leakjs n its was still there. i then suspected the intake mani. gasket n still there. then a guy chek my car like 2 weeks ago n he found it was the oring of my injectors it was crack. thank god i had spare one n now no leak. but then again i'm n/a so idk how much of a difference it be but defeniely replace it. they wear out. gl

[Pro ViZIon]

Yeah I know its not good definately. You'll be flooding that cylinder with fuel all the time. Also I believe the z32 has the same style injectors as well.

[ship2236]

Aight thanks guys. Picked up a spare injector from my work today...lol. Once I get a chance to throw it I'n I'll update as to if the issue is fixed.

[ship2236]

So replaced the o rings on the injector and still nothin. It seems as if I drive the car under normal circumstances like it was a stock motor, it runs n idles perfect. As soon as it hits boost is where it falls on it's face. I'm thinking either my maf (n62) took a shit or safcII reset itself. Idk it's a pain I'n the ass.

[Pro ViZIon]

You should probably get an rs-enthalpy rom tune. But I would definately check your maf like you mentioned and maybe the tps as well. And can't you run an N60. Are you getting adequate fuel? I know you said you have a walbro but there could be a clog somewhere. Just a possibility.

[ship2236]

Yea I'm getting good fuel. Have a new tt Z32 filter aswell. I really wish I could get an
Ethalpy or jwt tune..... But the fact is the money I would hve torwards that went to dip shit at emance n he robbed me for $200. So I really don't have money to spend on a tune now. Ima just try n play with the afc a bit more cus it ran really hard and well before n out of nowhere went yo shit.

[Pro ViZIon]

I think he's selling a used one for your setup for like $379.

Anyway yeah probably messing with the tune would be cheaper anyway.

How is that setup anyway. I'm going ka-t in the near future and I'm wanna run your setup pretty much with a t28 turbo. Not sure what your using.

[ship2236]

My setup when running good even without a rom tune made some good power. Definately pulled alot harder than my sr did with a t28, fmic, and good piping out the back. Just tale ur time. Motorwise it has wiesco standard bore 9.1 pistons, new rings and bearings, head was redone with valves, guides an leakedown to be sure it was good. And from there it's just 370's, z32 maf, safcII,felpro HG, t3/t4 top mount with custom down pipe, stock exhaust( no more ref n exhaust tickets for me!) and fmic on 10psi and it pulls great. Real torquey down low. Just want to get it fixed lol

[Pro ViZIon]

What turbo are you running? And that's stock exhaust hanging out the back?

[ship2236]

It's a Godspeed t3/t4 hybrid ar63. And no those were my aspec blastpipes with 3" straight pipe off a megan 3" down pipe when I had my sr lol

[Pro ViZIon]

I love the way that exhaust looks lol. I could rock that out here with no problems.

Any luck yet. I saw a post on ka-t.org with similar issues to yours. You should check it out.

[ship2236]

Yea I know man I loved them, but to much attention. Oh well I'm moving to Colorado I think so I won't have to worry about it. N u think u can post the link... Tryin to find shit on my phone is lame. Thanks

[Pro ViZIon]

nvm bro. his issue ended up being bad injector o-rings on three of the injectors.

[ship2236]

Damn that sux. Well I pulled the plug wires n saw oil on tge ends of 3 of them. So I pulled the valve cover and spark plugs tp see oil had leaked from the gasket into tge spark plug cylinders n gotten on them. Replaced the gasket n cleaned all the oil and nothing. Went through my afc settings n they r all the same. Only thing left is either a bad maf or sonehow my turbo is shot. No shaft play or smoke. Fml

[Pro ViZIon]

Yeah check the maf out. And maybe you just need a set of colder plugs.

[ship2236]

Idk I was running ngk bkrei7 n just went to a 6 cus I saw that's what moat everyone is running. I'm seriously ready to just part this thing out lol

[Pro ViZIon]

If you do let me know.........JK LOL....no but seriously :bigok:

[Pro ViZIon]

Also check these out:

Alot of stuttering in KA-T above 4000 RPM's - Nissan 240SX Forums (http://www.240sxforums.com/forums/ka24de-ka24e/40124-alot-stuttering-ka-t-above-4000-rpms.html)

KA-T hesitation, please help. - Nissan 240SX Forums (http://www.240sxforums.com/forums/ka24de-ka24e/99671-ka-t-hesitation-please-help.html)

http://zilvia.net/f/engine-tech/360624-ka-t-wont-go-into-boost.html

Not too sure if all of it relates. I was doing this on my phone so you know what that's like.

[ship2236]

Thanks man ima check these out!

[s13-ghost]

if u part out how much for the xhaust. lol jp

[ship2236]

Lol. It's already been sold to another member on here haha

[Mel-O]

any progress?

[ship2236]

^^^ absolutely none man. The car as of today actually is running worse. Before it drove fine until boost started to build around 3500 and now, around 2200-2500rpm it runs like death. Really shitty and is wearing on my nerves because I just can't figure it out. It seems like a fuel issue now but everything is new. Unless the ecu is fried n stuck I'n limp mode or something. But I'm lost and have no more ideas.

[Pro ViZIon]

Have you tried swapping another ecu in?

[ship2236]

Not yet but I do have a spare. I just dont know If I want to risk frying another if that is the problem

[Redmonkey]

Try a compression test..

[ship2236]

^^^ 150 across the board!

[Redmonkey]

Did you crank at WOT? That's not the worst compression but it's good enough to turbo. Did you do a test prior to putting the turbo on?

[xxoreolovexx]

Did you check your knock sensor? I would definitely check your timing again and i would also try a different ecu.

[ship2236]

Compression was 155 or 160 prior to the turbo I'm not sure. Ima throw the other ecu I'n it n go from there. Knock sensor is fairly new n my afc isnt throwing any warnings for knock. Gonna throw on a new cap n rotor and correct any timing issues if any after

[Pro ViZIon]

Thats what my compression numbers look like. Your issue is crazy bro. maybe you need someone to look at it.

[ship2236]

One Of my best friends is a Nissan guru, but every issue we've thought of and fixed has yet to do a thing lol. I don't hv the cash or the trust to deal with any local shops around here. To much shadiness has come from
Them alreadi

[Pro ViZIon]

yep. hella shady out here in vegas too.

[Mel-O]

have you checked your spark plug ends for scoring, caking, cracking, or any other hazardous conditions?
also have you tried to read the code?

[ship2236]

Sorry I havnt had Internet the last few days. Problem still exists so I'm at my breaching point with it. Tried a diff maf, ecu, new cap and rotor, tps and still nothing. I'm going to pickup a new harness and if it doesn't fix the problem I'm going to be posting a full KA-t motorset for sale or trade lol

[Pro ViZIon]

Aaah man that would suck. Hopefully the harness fixes it.

[ship2236]

Ima try n post a video here soon maybe tonite or tomorrow n that might give u guys a better perception of my problem

[ship2236]

Alright guys here's a quick video. Don't mind the camera man it's my gf lol. Basically it how's how rough and jerky the car runs and only revs about 3200 with a load on it. Starts to build boost but falls off and acts like it's hitting a constant fuel cut. Things I've done to sort the problem:

New fuel pump
New z32tt filter
New FPR
New injector o rings/seals
New spark plugs, cap an rotor
Boost leak rest and 1 small leak fixed
Afc settings are all the same as they have been
Ran it with a diff Z32 maf
Bolted up another exhaust with a newer cat

And after all this it still runs like shit. Undriveable... I'm sure it'd something stupid I've maybe overlooked but if anyone else has any helpful info feel free to share. Thanks for all the help thus far.

http://i143.photobucket.com/albums/r134/steveship56/42188b20.mp4

[Pro ViZIon]

you couldnt really read your safc in the vid.

[ship2236]

Yea it's cus the car drives so jerky lol. But I realized when I ran a sensor test my tps is only pulling 4volts n needs to be at 5 I believe. So ima check the FSM on nicco n go from yhere

[Pro ViZIon]

really seems like a fuel issue. have you tried another distributor?

Thats what it was like with my rx-7 when it wasnt getting fuel.

You said you have a new pump. Is it a walbro?

Have you checked out the iacv?

[attaus]

My bet is on ignition. Take the 6 plugs out and put in 7's or stockers.. should run better.

[ship2236]

It's got a walbro and the plugs shouldn't make a diff since it was running perfect with these ones for a long period of time lol. Checked the tps and it is good. Did a noid test and the injectors r all firing. Gonna put the timing light to it n see where I'm at

[Redmonkey]

You really need a wideband gauge to see if it's a fuel related issue. My ka-t was idling and running crazy rich. Found out one of my o-rings keeps slipping off because I didn't have pintle caps on the injectors. Replaced those and it runs great now. Did you also lube the o-rings with vaseline or oil before putting them back in?

[ship2236]

^^^ yea I'm working on that at tge moment. Got burnt by a member on another forum so my funds r low. But I used Vaseline on the o rings. No oil based stuff. Also performed a leak test after they were installed an the problem didn't exist anymore. My friends say it's got to be a fuel related issue. I just don't see that after it has a whole new fueling system and the fact it will rev 3500 when cold, just not produce boost, and only rev about 16-1800 after it is warmed up. Been searching this n have found way to many threads with similar issues and no resolves. Really sucks I'm passed the point of exhaustion with this.

['97 S14 SE Turbo]

sparkplug gap? Make sure your ignition system is strong enough.

[ship2236]

Gap is @ 28. Thought it could be the cps( crank pos sensor) but seeing as i have a s13 trans there's no sensor or place for it on the bellhousing.

[Pro ViZIon]

Didn't only obd2 use that sensor?

[ship2236]

Yea i didn't even think of that at the time lol. Anyways i just pulled the knock sensor...

http://i143.photobucket.com/albums/r134/steveship56/3a0f6b01.jpg

It's cracked all the way through. It's a pain I'n the ass so ima have to install the new one tomorrow when i have better light and can make more room to get In there. Hopefully this fixes my issue......

[Redmonkey]

Have fun digging through the manifold lol. It's easy taking it out but a PITA to get it back in.

[Pro ViZIon]

If your manifold is stripped down like mine then it shouldn't be too bad. I can get my arm under it from the back side.

[ship2236]

My mani is semi bare, but my arms are to big to fit through the bckside all the way lol. I am a good 3" away from the hole and tried to use a hanger to position it and a lOng skinny extension to get it it but i just couldn't get it. Gotta get one of my asian friends to come over n ninja that shit for me

[Pro ViZIon]

Haha. Ninjas.....oh but there's a write up somehwere for this. Just google it. I know that he used as wobble extension to get the socket on it.

[ship2236]

Knock sensor changed nothing so I'm going to have to hit up a junkyard n let them take me for all it's worth on a whole new harness, distributor and ecu and if that doesn't fix the problem I'll send out the invites to the Bon fire hosted by my 240

[Pro ViZIon]

Good luck man. I really hope that it works for you.

[Corey121]

Mine ran great when i first started my ka-t then it started running like crap, i ripped the lower orings on the injecters i replaced them three times, and finally i got them in right, i wasnt pushing the injecters in i was setting them in and tightening them up, then i had a massive boost leak so the car would die, i ran my intercooler pipping and fixed my problem, then when i was getting into boost it was breaking up and spitting and spuddering i gapped the plugs to .30.

I see your gap should be fine, if your smelling alot of fuel then maybe the orings are toast. (I skimmed through the post so i might have missed something) Did you check your timing? I didnt have to adjust mine i got an enthaply tune.

[boosted KA24DE]

I had problems like you are mentioning through out your thread and yes I too had boost leaks but what made my setup even better was upgrading the ignition to a new 6A digital by MSD. It purrs like a kitten now running 1000cc injectors.

[ship2236]

^^^ yea i think bigger injectors and a 6a will be next if it gets up n running. Sorry to not post for a few days. So i ripped out the s14 ecu and harness. Got a great deal from a friend on a s13 man ecu and full harness. Waiting on another guy to come through with a s13 dizzy n coil wich i have a new cap n rotor n wires waiting. I trew I'n another set of plugs. Gonna run them at 28 still. And lastly i gotta take this ecu to a comp or tv repair place n see if they can solder this emance daughterboard I'n for me. Then I'm gonna trash that damn safcII!

[AZRB20]

This sounds like definitely a fuel issue.. how are you monitoring your AFR? My old SRT4 did this issue when my Greddy e manage would lose control of fuel. It pretty much run like shit from flooding the cylinders and cause the car to misfire. Also could be maybe TPS sensor..

[ship2236]

I re-clocked and tested tge old tps n it was fine but i had a new one i put on anyways n it made no difference. At the moment i can't monitor the afr's because i paid for an innovative wideband from a member on another forum I'm not gonna disclose, and never recieve it.

[Pro ViZIon]

Dude you have bad luck like me lol. I bought a distributor from a member on here and he sent me one for an s14 when I was asking for an s13 one. He hasn't gotten back to me.

I'm not sure if this would do anything but does the iacv piping need to be routed pre-turbo. It just seems weird to place it in the intercoooler piping since it would be receiving pressurized air.

[ship2236]

So everything is I'n the car at this point. Got my emance daughterboard soldered I'n the ecu. Only issue right now keeping me from starting it is the guy i got tge s13 dizzy didn't give me the base that spaces tge cap so I'm off to a junkyard to dwell around. Wish me luck lol

[Pro ViZIon]

I was wondering what was going on. good luck. You talking about the black plastic piece thats under the rotor? if you dont find one i have one.

[ship2236]

Yea i found one. Nowwwwwww..... Lol the problem is...... I have no spark haha. Everything is grounded, tried 2 diff dizzies from 2 diff running cars, 2 diff coils and nothin haha. Fml.

[Pro ViZIon]

Well the good news is i got my car running. Im not sure how well though. didnt get to drive it. Turns out my front main seal is leaking hella bad. so now im in the middle of replacing that. Have you swapped ecu's? i dont remember. no spark could really only be from the dizzy not being hooked up or the coil not being hooked up correctly. ive never seen that.

[ship2236]

Yea swapped to the s13 ecu with the rom tune. All the connectors seem tp be I'n good shape on the dizzy and coil. Plus i tried other ones from my buddies running car. I have the day off so i need to figure this out

[ship2236]

So today for some reason the car wouldn't produce a spark or crank for that matter. Then the ecu started to smoke! The stereo wouldn't work and i got mad as hell. Seriously i walked away from tge car and left it for about to hours... Walked back out to the garage, stood I'n front of this mother fuc*** and said if u don't start I'm parting ur ass and burning tge shell I'n the desert! I sat I'n it n turned the key.... The bitch started right up, i took it for a ride down the street and... Tge same exact issue is present wich i started this thread about even with all the s13 components lol. FMFL!

[Pro ViZIon]

At least your out of that sub-rut lol. I was going through troubles today too haha.

But i really dont know what to tell you about that shit. Have you asked on KA-T.org?

[rps13dn]

i can fix it but ur to far dont know if u want to drive that far

[ship2236]

How an u fix it?

[ship2236]

i can fix it but ur to far dont know if u want to drive that far

Is there something u see I'n this thread that i don't? Just asking because if ur serious, I've exhausted my efforts at this point n would work out a deal to get it back on the road. Only thing is if uve read, the car is obviously undriveable, especially to la lol.