ka-t need help - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

consatantagrevation · 05-01-2014, 11:45 PM

i have searched the internet over and over again and can not find anyone with even a similar problem as i am having. my car is running insanely rich and misfiring at idle w/b is reading 9.4-10.1 i have replaced the ecu,injectors,maf, ive done it all trying to lean it out and with no result ive even put several sets of number 7 ngk r plugs gaped to between .25-.32 we've tried both
mod list:
cx racing turbo kit
.50ar to4e top mount
walbro 255
tomei fpr (set any where from 43.5 all the way to 0 psi no change)
stock ecu
stock maf
stock injectors

i have a nissan master tech helping me
the fact that i have stock ecu,maf,and injectors should not effect how the car idles there is a hidden problem here the car has a extremely rough idle like that of a built rotary. dont want to be rude but i dont need to be preached to about how i need to learn about what im doing everybody has to start somewhere

OnTheChip · 05-02-2014, 09:38 AM

It could be a faulty fuel pressure regulator or leaking injector(s).

heychris · 05-02-2014, 12:22 PM

Did you do a compression test before reposting this problem?

http://zilvia.net/f/showthread.php?t=562243

Again sounds like you have several issues. The bone stock KADE ecu and injectors were not designed for boost...

My reply from your other thread still stands. I would again suggest hitting up Amazon for some books on turbo/supercharging an engine so that you can gain basic knowledge on the principles involved... I hope for you that the engine is not already ruined at this time...

Good luck!

Ch

Sent from my SM-N900V using Tapatalk

spooled240 · 05-02-2014, 12:46 PM

Quote:

Originally Posted by OnTheChip

It could be a faulty fuel pressure regulator or leaking injector(s).

This. The diaphram in the FPR might be leaking and causing it to simulate a medium to high load situation.

swap the stock one back on there and see if that helps.

consatantagrevation · 05-02-2014, 01:31 PM

i swapped the stock one back in it idled smooth at 12.5-12.7 for about 30 secs then the problem just popped back up it ran rich

consatantagrevation · 05-03-2014, 05:30 PM

Joe said not to do that
Oh and i found the problem it was a exhaust leak before
the o2 sensor

JF_OverBoosted · 05-04-2014, 08:58 PM

Needs tune.

05-01-2014, 11:45 PM	#1
consatantagrevation Join Date: Apr 2013 Location: nc Posts: 12 Trader Rating: (0) Feedback Score: 0 reviews	ka-t need help i have searched the internet over and over again and can not find anyone with even a similar problem as i am having. my car is running insanely rich and misfiring at idle w/b is reading 9.4-10.1 i have replaced the ecu,injectors,maf, ive done it all trying to lean it out and with no result ive even put several sets of number 7 ngk r plugs gaped to between .25-.32 we've tried both mod list: cx racing turbo kit .50ar to4e top mount walbro 255 tomei fpr (set any where from 43.5 all the way to 0 psi no change) stock ecu stock maf stock injectors i have a nissan master tech helping me the fact that i have stock ecu,maf,and injectors should not effect how the car idles there is a hidden problem here the car has a extremely rough idle like that of a built rotary. dont want to be rude but i dont need to be preached to about how i need to learn about what im doing everybody has to start somewhere

05-02-2014, 09:38 AM	#2
OnTheChip Zilvia Junkie Join Date: May 2013 Location: Burgaw, NC Posts: 311 Trader Rating: (0) Feedback Score: 0 reviews	It could be a faulty fuel pressure regulator or leaking injector(s). __________________ NismotronicSA - Speed-Density Tuning for Nissans

05-04-2014, 08:58 PM	#7
JF_OverBoosted Zilvia Member Join Date: Nov 2013 Location: Planet Namek, SoCal Age: 27 Posts: 163 Trader Rating: (0) Feedback Score: 0 reviews	Needs tune. __________________

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05-02-2014, 12:22 PM	#3
heychris Zilvia Addict Join Date: Oct 2007 Location: SkiTown USA Posts: 754 Trader Rating: (20) Feedback Score: 20 reviews	Did you do a compression test before reposting this problem? http://zilvia.net/f/showthread.php?t=562243 Again sounds like you have several issues. The bone stock KADE ecu and injectors were not designed for boost... My reply from your other thread still stands. I would again suggest hitting up Amazon for some books on turbo/supercharging an engine so that you can gain basic knowledge on the principles involved... I hope for you that the engine is not already ruined at this time... Good luck! Ch Sent from my SM-N900V using Tapatalk

05-02-2014, 01:31 PM	#5
consatantagrevation Join Date: Apr 2013 Location: nc Posts: 12 Trader Rating: (0) Feedback Score: 0 reviews	i swapped the stock one back in it idled smooth at 12.5-12.7 for about 30 secs then the problem just popped back up it ran rich

05-03-2014, 05:30 PM	#6
consatantagrevation Join Date: Apr 2013 Location: nc Posts: 12 Trader Rating: (0) Feedback Score: 0 reviews	Joe said not to do that Oh and i found the problem it was a exhaust leak before the o2 sensor