lscmkviii
Dedicated LVC Member
What do I need to do if I run 42lb injectors? I have a MAF calibrated for them but it throws the CE light on. Do I need an adjustable fuel pressure regulator or will a tune solve the issue? The code is P1152.
Injector/tune question.
- Thread starter lscmkviii
- Start date
unity
Dedicated LVC Member
Curious. Why are you dumping more into the intake end of things. Do you have custom/larger exhaust? Marks breathe very well, its the output end that is restrictive.
But assuming you do, you really need to get a chip. That should help out.
But assuming you do, you really need to get a chip. That should help out.
lscmkviii
Dedicated LVC Member
I do have a 2.5 inch system with flowmaster 40s on it. Bassani high flow cats and headers are next, I just havent put them on yet! Is it ok to run like it is? Feels like its going through gas real quick.
unity
Dedicated LVC Member
I salute you! If you did not have that setup, I would have slapped you!
You need a chip/tune and you need one now. You are going beyond what the ECU is designed to handle. Any part of your setup alone would not be a big problem on its own, but now you are pulling through more air than normal and the car is try to adjust the mixture.
A tune from Geno or Torrie (I have one from Torrie) would help a lot, but I would not expect to get the same milage a stock Mark would have.
If you talk to Geno I am sure he will have some great advice, or Jamie97LSC... or poney... monstermark .... but not mespock
j/k
lscmkviii
Dedicated LVC Member
I did the Walbro 255 pump. Also I dont know if it matters but I put in 373 gears with a tracloc unit and under drive pully set all at the same time! Before the CE light the car scared me on the highway. It broke loose on the on ramp! That is with new 285/35ZR18 Pilots on the rear too! I dont need to say it but, Damn it feels fast!
Psychostang
Dedicated LVC Member
This is your code definition:
P1152 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Rich - Bank No. 2
P1152 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Rich - Bank No. 2
lscmkviii
Dedicated LVC Member
So should a tune be able to lean the mixture out?
lscmkviii
Dedicated LVC Member
Thanks unity. One more question, I am looking into getting the XCAL II tuner. Do you know anyone that sells a tune for the mark, I know you said Geno sells a chip, but I really want a tuner for future mods.
unity
Dedicated LVC Member
Geno may sell a tuner, not sure. But I know for sure Torrie @ fastpartsnetwork.com does. FOr $100 more than a chip I could have got a tuner. I wish I had, then he could have just e-mailed me my adjustments.
42 injectors are way overkill on N/A mark viii engine.IIRC 42 injectors will support around 650 rwhp with N/A application and around 550 rwhp with FI application .If I was you I wouldn't even waste my money for 42 injectors,stock 24's are fine.
lscmkviii
Dedicated LVC Member
They were free along with the MAF from a friends Lightning. Overkill or not the question is will they run right with a tune? FI is in my future but not before big brake upgrade, so the injectors are staying unless they cant be tuned.
I'm not an expert but I read on some forums that if you're over killing on your injectors you might have a problems tune the car because injectors will be running on very low cycle. Tuners should know more about that.
m_maker
Dedicated LVC Member
Smart man, listed to him.
Running 42lb injectors on a 200rwhp 4.6 is like dumping fuel out the window.
You can get it tuned right, but WHY ? Put the 24's back in with a stock MAF, and save them for when they're really needed. You're not getting any power from them, just driveability issues, with stock power.
chicken
SHEOOOOOOOOT
the biggest problem i see is that its only rich on bank 2, well if you have all 8 bigger injectors in, then there is a underlying problem besides having huge injectors in a stock eng. ive heard of lots of check engine lights from just the bigger maf, usually lean codes though
unity
Dedicated LVC Member
I never understood the "brake upgrade" due to more HP. Does the car really weight that much more? No. Does it make that much harder to brake? No, not if you know how to drive. Just my 2 cents.
I can see some logic to it, i guess. You know, you get up to speed faster, so you may need to scrub off some speed faster. More hp = possibly more aggressive driving style? Plus, the new found hp may allow you to reach crazy speeds that the standard set up wasn't designed to cope with. As part of an overall performance package, it kinda makes sense...
unity
Dedicated LVC Member
Well right. But even under normal driving the TC will unlock and the car should stop fine no matter how much power it has. Maybe I am just odd, but when I have to stop fast its a complete reflex for me to drop the car in neutral.
vr4
Dedicated LVC Member
more power=more speed. get to higher speeds faster require more brake to bring it back down safely.
unity
Dedicated LVC Member
You do realize that completely defies the laws of physics.
If power is no longer being applied there is no thrust. If the mass is the same and the thrust is no longer applied, the object will take the same braking power to stop, no matter how fast it got up to speed in the first place.If I shot a bullet into the air until it free falls and measure that height, and then throw a bullet to that same height, they will fall at the same rate.
ONEBADMK8
Dedicated LVC Member
We sell Sniper Tuning Software for the OBDII Marks. Cheapest in the USA too.
lscmkviii
Dedicated LVC Member
Geno, Should I even try to tune the car with 42s? Or get an aggressive tune for the 24s? Do you know anyone running #42s on these cars? What mods are needed to run the setup I have, the right way?