SR20 Mystery Tune For Nonexistent Parts/New User "Build" - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Loli_Driver · 10-04-2020, 04:43 PM

I finally decided to make an account after lurking for 2 years, so please bear with me being new to the forum and also a fairly new SR/240SX owner

I have owned my Redtop SR 240 for about 2 years now. I recently replaced my fuel injectors because one went bad and caused a misfire, this is where my problems get exponential. I bought the car from some guy who was giving up on his project to fund another one of his projects. Long story short the car has a decent amount of mods. I'll list the mods from the original craigslist post, and also my own additions.

Engine Specs:
S-13 Sr20det red top engine
*Turned crank, polished, balanced
*King race bearings (tri layer) main, crank, thrust
*NPR piston rings (nippon)
*TOMEI 264 Pon cams
*ARP head bolts
*APEXi head MLS head gasket
*PHASE2 upgraded oil pump
*FRsport rocker arms, timing chain kit, including tensioner and guides
*JWT gt2871r turbo
*ISR Braided turbo lines
*Mishimoto radiator
*Godspeed intercooler pipes with Spearco intercooler
*HPS silicone radiator hoses
*HKS ssqv blow off valve
*GReddy rocker arm stoppers
*NST aluminium pulleys
*Circuit Sports aluminium overflow tank
*Megan turbo manifold
*Megan turbo elbow
*Megan down pipe and full exhaust system

Drivetrain:
*ACT super street/strip clutch
*TEIN coilovers type II he coilovers with adjustable camber plates and pillow ball mount
*TEIN inner tie rods
*kazama Tension rods
*Energy suspension bushings throughout the enitre rear end, and sway bars
*JDM VLSD rear end with fresh fluid (works awesome)
*JDM 6 bolt axles
*New wheel bearings up front
*300ZX big brake upgrade kit 28mm iron in the front (rebuilt)
*Brembo slotted rotors up front with stainless steel brake lines

Wheels/Interior add ons:

*RHDjapan torque dampener
*AC autotechnic oil pressure gauge
*4 Color faze led boost gauge
*AEM UEGO wideband

So now my problem. The ecu for my car has a sticker on it that says emance, some of you are probably familiar with that. This sticker had written on it 4 things SR/6+2340/555cc/N62. I know that that 555cc should be for the injectors size, and N62 is a z32 MAF sensor, idk what 6+2340 is tho. This is where the confusion starts, because I still have the stock MAF sensor, not a z32 N62. Now with this information, I decided on stupid intuition to buy a set of Tomei 555cc injectors to replace mine. And today I finally got around to replacing them. Everything went fine, but now my car runs extremely rich ~10.7. Before it was running a little lean anywhere between 13.7 all the way to the 16s not(for what I could tell) dependent on load. Because of this change in AFR I am led to believe that it was running stock injectors this entire time, which I should've figured out on my own based on the color, but I had "broken car upgrade brain" nonetheless.

This is probably a simple solution, I just don't have the money right now to buy a N62 MAF and test that out, or to do a retune, so I wanted your guys input. Ill put some pictures of my "Build." Any questions are appreciated, thanks for looking at my noob thread.

https://imgur.com/a/8N7X1Dt here is an imgur album because the pics were way too big to be embedded

10-04-2020, 04:43 PM	#1
Loli_Driver Join Date: Oct 2020 Location: Oregon Posts: 5 Trader Rating: (0) Feedback Score: 0 reviews	SR20 Mystery Tune For Nonexistent Parts/New User "Build" I finally decided to make an account after lurking for 2 years, so please bear with me being new to the forum and also a fairly new SR/240SX owner I have owned my Redtop SR 240 for about 2 years now. I recently replaced my fuel injectors because one went bad and caused a misfire, this is where my problems get exponential. I bought the car from some guy who was giving up on his project to fund another one of his projects. Long story short the car has a decent amount of mods. I'll list the mods from the original craigslist post, and also my own additions. Engine Specs: S-13 Sr20det red top engine Turned crank, polished, balanced King race bearings (tri layer) main, crank, thrust NPR piston rings (nippon) TOMEI 264 Pon cams ARP head bolts APEXi head MLS head gasket PHASE2 upgraded oil pump FRsport rocker arms, timing chain kit, including tensioner and guides JWT gt2871r turbo ISR Braided turbo lines Mishimoto radiator Godspeed intercooler pipes with Spearco intercooler HPS silicone radiator hoses HKS ssqv blow off valve GReddy rocker arm stoppers NST aluminium pulleys Circuit Sports aluminium overflow tank Megan turbo manifold Megan turbo elbow Megan down pipe and full exhaust system Drivetrain: ACT super street/strip clutch TEIN coilovers type II he coilovers with adjustable camber plates and pillow ball mount TEIN inner tie rods kazama Tension rods Energy suspension bushings throughout the enitre rear end, and sway bars JDM VLSD rear end with fresh fluid (works awesome) JDM 6 bolt axles New wheel bearings up front 300ZX big brake upgrade kit 28mm iron in the front (rebuilt) Brembo slotted rotors up front with stainless steel brake lines Wheels/Interior add ons: RHDjapan torque dampener AC autotechnic oil pressure gauge 4 Color faze led boost gauge AEM UEGO wideband So now my problem. The ecu for my car has a sticker on it that says emance, some of you are probably familiar with that. This sticker had written on it 4 things SR/6+2340/555cc/N62. I know that that 555cc should be for the injectors size, and N62 is a z32 MAF sensor, idk what 6+2340 is tho. This is where the confusion starts, because I still have the stock MAF sensor, not a z32 N62. Now with this information, I decided on stupid intuition to buy a set of Tomei 555cc injectors to replace mine. And today I finally got around to replacing them. Everything went fine, but now my car runs extremely rich ~10.7. Before it was running a little lean anywhere between 13.7 all the way to the 16s not(for what I could tell) dependent on load. Because of this change in AFR I am led to believe that it was running stock injectors this entire time, which I should've figured out on my own based on the color, but I had "broken car upgrade brain" nonetheless. This is probably a simple solution, I just don't have the money right now to buy a N62 MAF and test that out, or to do a retune, so I wanted your guys input. Ill put some pictures of my "Build." Any questions are appreciated, thanks for looking at my noob thread. https://imgur.com/a/8N7X1Dt here is an imgur album because the pics were way too big to be embedded Last edited by Loli_Driver; 10-11-2020 at 02:55 PM..