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

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

Also check these out:

Alot of stuttering in KA-T above 4000 RPM's - Nissan 240SX Forums

KA-T hesitation, please help. - Nissan 240SX Forums

#/f/engine-tech/3606...nto-boost.html

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

Thanks man ima check these out!

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

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

any progress?

^^^ 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.

Have you tried swapping another ecu in?

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

Try a compression test..

^^^ 150 across the board!

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?

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

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

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

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

yep. hella shady out here in vegas too.

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

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

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

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

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/r...6/42188b20.mp4

you couldnt really read your safc in the vid.

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

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?

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

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

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?

^^^ 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.