KA-T stumbles and has no power - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

***FaLKoN240*** · 08-04-2008, 12:13 PM

I tried KA-T.org already and got almost no responses, so I figured I'd ask here.

I went to the track shortly after getting my new car put together.

On the way there we discovered my BOV was too tight, and that's why I stumbled at full throttle, after I adjusted the spring on my BOV, the car ran great, boost and power all the way.

After a while I was a little curious and did a BOV delete set up (compressor surge)

Needless to say it didn't work well, so I put the BOV back in, and now the car stumbles at more than half throttle.

The turbo will spool (you can hear it) but it runs rich, and doesn't pull the car at all.

I'm not sure what it could be, my friend went off track a lot, but I don't think that has anything to really do with it.

I need to do a tune up, (plugs and wires) but the car ran fine for the entire track day.

Why would the set up change now?

I have no meters to gauge my boost, temp, or oil pressure, I'm pretty much going from the butt dyno here.

BTW

KA24DE

T28

450cc deathwork (haha) injectors

Z32 MAF

ARC BOV

Enthalpy ECU tuned for my specific set up.

SHIFT_*grind* · 08-04-2008, 12:19 PM

Are you sure there's not a leak at the BOV?

***FaLKoN240*** · 08-04-2008, 12:21 PM

I can try tightening it, but it was too tight before, I'll try that when I get off work.

ewuzh · 08-04-2008, 12:23 PM

So it was running fine with the properly adjusted BOV.
You removed it and then you put it back in.
Now no power and running rich?

My guess is air/boost/leak problem. I would get a boost gauge to see if you're even boosting or if there is a boost leak somewhere.

But man...going to the track on a custom KA-T setup with not even a boost gauge...kinda like driving at night without headlights

brokeAs240sx · 08-04-2008, 12:24 PM

Sounds exactly like a car w/ a boost leak, especially since you are running MAF...

if it's not @ the BOV, it could be anywhere on your intercooler piping. Either when you did the "bov delete" or from the off track excursions, you could have created a leak in any one of the couplers on the piping.

SHIFT_*grind* · 08-04-2008, 12:26 PM

Quote:

Originally Posted by FaLKoN240

I can try tightening it, but it was too tight before, I'll try that when I get off work.

There's that, but I was thinking along these lines:

Quote:

Originally Posted by ewuzh

So it was running fine with the properly adjusted BOV.
You removed it and then you put it back in.
Now no power and running rich?

My guess is air/boost/leak problem.

Maybe there's a leak where you mounted it? I'd just check everything over really well and make sure you didn't miss anything.

sunnys14 · 08-04-2008, 03:30 PM

Turbo spooling loud + no power = Boost leak for sure

A wideband would help to see if you are leaking boost (rich)

*NemeGuero* · 08-04-2008, 03:40 PM

leak da boost

bardabe · 08-04-2008, 09:39 PM

el boost leak.

*downshift_sideways* · 08-04-2008, 09:44 PM

Agreed.

Leaking boost homie.

KA-T's always pwn YOU!

*NemeGuero* · 08-04-2008, 10:38 PM

So I heard a rumor that Evan might be doing another Ka-t.

!Zar! · 08-04-2008, 10:41 PM

Boost leak.

duh.

***FaLKoN240*** · 08-05-2008, 12:33 AM

Quote:

Originally Posted by !Zar!

Boost leak.

duh.

OK, then help me come fix it!

!Zar! · 08-05-2008, 01:58 AM

Hahaha.

Could've done it today.

Could be doing it right now.

I'm wired off energy drinks and coffee.

Shit.

Uhh...

Wake me up and I'll deal with it before I head out.

hahaha.

Hyper as fuck... shit.

deuceforty · 08-05-2008, 07:37 AM

check the manifold where it meets the turbo, i know i had similar issues and when i pulled my mani and turbo 2 of the nuts had backed out and the other 2 were very loose. not to mention the gasket had blown out

08-04-2008, 12:13 PM	#1
*FaLKoN240* Super Moderator Join Date: Jun 2004 Location: SoCal Temecula Posts: 16,893 Trader Rating: (73) Feedback Score: 73 reviews	KA-T stumbles and has no power I tried KA-T.org already and got almost no responses, so I figured I'd ask here. I went to the track shortly after getting my new car put together. On the way there we discovered my BOV was too tight, and that's why I stumbled at full throttle, after I adjusted the spring on my BOV, the car ran great, boost and power all the way. After a while I was a little curious and did a BOV delete set up (compressor surge) Needless to say it didn't work well, so I put the BOV back in, and now the car stumbles at more than half throttle. The turbo will spool (you can hear it) but it runs rich, and doesn't pull the car at all. I'm not sure what it could be, my friend went off track a lot, but I don't think that has anything to really do with it. I need to do a tune up, (plugs and wires) but the car ran fine for the entire track day. Why would the set up change now? I have no meters to gauge my boost, temp, or oil pressure, I'm pretty much going from the butt dyno here. BTW KA24DE T28 450cc deathwork (haha) injectors Z32 MAF ARC BOV Enthalpy ECU tuned for my specific set up. __________________ Best way to do business with me? Make your best offer FIRST.

08-04-2008, 12:19 PM	#2
SHIFT_grind Nissanaholic! Join Date: Nov 2004 Location: NWA Age: 42 Posts: 2,066 Trader Rating: (7) Feedback Score: 7 reviews	Are you sure there's not a leak at the BOV? __________________ My seller review thread

08-04-2008, 12:21 PM	#3
*FaLKoN240* Super Moderator Join Date: Jun 2004 Location: SoCal Temecula Posts: 16,893 Trader Rating: (73) Feedback Score: 73 reviews	I can try tightening it, but it was too tight before, I'll try that when I get off work. __________________ Best way to do business with me? Make your best offer FIRST.

08-04-2008, 12:24 PM	#5
brokeAs240sx Nissanaholic! Join Date: May 2004 Location: Southern California Posts: 1,917 Trader Rating: (40) Feedback Score: 40 reviews	Sounds exactly like a car w/ a boost leak, especially since you are running MAF... if it's not @ the BOV, it could be anywhere on your intercooler piping. Either when you did the "bov delete" or from the off track excursions, you could have created a leak in any one of the couplers on the piping. __________________ bew bews!

08-04-2008, 03:40 PM	#8
NemeGuero No more nissan. Join Date: Jan 2003 Location: RAIN, Washington. Age: 40 Posts: 8,132 Trader Rating: (10) Rides Gallery: NemeGuero Feedback Score: 10 reviews	leak da boost __________________

08-04-2008, 12:23 PM	#4
ewuzh Zilvia Member Join Date: Oct 2006 Location: SoCal Age: 39 Posts: 263 Trader Rating: (0) Feedback Score: 0 reviews	So it was running fine with the properly adjusted BOV. You removed it and then you put it back in. Now no power and running rich? My guess is air/boost/leak problem. I would get a boost gauge to see if you're even boosting or if there is a boost leak somewhere. But man...going to the track on a custom KA-T setup with not even a boost gauge...kinda like driving at night without headlights

08-04-2008, 03:30 PM	#7
sunnys14 Zilvia FREAK! Join Date: Mar 2006 Location: a land far far away... Posts: 1,549 Trader Rating: (19) Feedback Score: 19 reviews	Turbo spooling loud + no power = Boost leak for sure A wideband would help to see if you are leaking boost (rich)

08-04-2008, 09:39 PM	#9
bardabe Post Whore! Join Date: Aug 2005 Location: SoCal Age: 35 Posts: 4,719 Trader Rating: (10) Rides Gallery: bardabe Feedback Score: 10 reviews	el boost leak. __________________ Review Thread

08-04-2008, 09:44 PM	#10
downshift_sideways No Limit Soldier. Join Date: Jan 2006 Location: Hayward CA, San Gabriel CA Age: 38 Posts: 5,550 Trader Rating: (0) Rides Gallery: downshift_sideways Feedback Score: 0 reviews	Agreed. Leaking boost homie. KA-T's always pwn YOU! __________________ allntrlundrgrnd: "you never really appreciate your parents fridge until you look into your own and its full of condiments only"

08-04-2008, 10:38 PM	#11
NemeGuero No more nissan. Join Date: Jan 2003 Location: RAIN, Washington. Age: 40 Posts: 8,132 Trader Rating: (10) Rides Gallery: NemeGuero Feedback Score: 10 reviews	So I heard a rumor that Evan might be doing another Ka-t. __________________

08-04-2008, 10:41 PM	#12
!Zar! Post Whore! Join Date: Nov 2004 Location: North Korea Posts: 14,579 Trader Rating: (27) Feedback Score: 27 reviews	Boost leak. duh. __________________

08-05-2008, 01:58 AM	#14
!Zar! Post Whore! Join Date: Nov 2004 Location: North Korea Posts: 14,579 Trader Rating: (27) Feedback Score: 27 reviews	Hahaha. Could've done it today. Could be doing it right now. I'm wired off energy drinks and coffee. Shit. Uhh... Wake me up and I'll deal with it before I head out. hahaha. Hyper as fuck... shit. __________________

08-05-2008, 07:37 AM	#15
deuceforty Zilvia Addict Join Date: Apr 2008 Location: raleigh Age: 37 Posts: 907 Trader Rating: (12) Feedback Score: 12 reviews	check the manifold where it meets the turbo, i know i had similar issues and when i pulled my mani and turbo 2 of the nuts had backed out and the other 2 were very loose. not to mention the gasket had blown out __________________ TWO TONE COUPE FS NC