[B_davis]

Is anyone else getting Post cat 02 sensors errors when spraying large amounts of meth? I keep getting 2C7C and occasionally the one from Bank 1. I just switched to much larger meth nozzles. Someone mentioned in another thread this might be related to spraying meth.

I also saw a new code last night which gave me limp model; 2F0C Intake air temperature, signal gradient? Has anyone ever seen this code?

[Jeff@TopGearSolutions]

Ive heard of codes when spraying too much meth when its too cold outside. Otherwise I spray an M12 with stock cats and no codes so perhaps they are on the way out. What is the exact code description? How much are you spraying? What is the rest of your setup?

[scottp999]

Post what nozzle sizes you are using and also where the nozzles are located.

How old is your car, how many miles, what are your exact performance mods? What meth mixture are you using?

Do you have a log from the tune you are running?

That's the kind of stuff people need to know to respond to you.

[Clap135]

Originally Posted by B_davis

Is anyone else getting Post cat 02 sensors errors when spraying large amounts of meth? I keep getting 2C7C and occasionally the one from Bank 1. I just switched to much larger meth nozzles. Someone mentioned in another thread this might be related to spraying meth.

I also saw a new code last night which gave me limp model; 2F0C Intake air temperature, signal gradient? Has anyone ever seen this code?

What tune are you using?

[Tzu]

^ Welcome back?

[EDM92]

Originally Posted by Tzu

^ Welcome back?

+1

[B_davis]

From my calcs I am spraying about 650ml/min of 80/20 meth/water. Using the cobb 93oct V202 map, I am swapping out to smaller nozzles as we speak. I had a precat 02 go dead a couple weeks ago after cleaning my valves, I am just wondering if this is the rest of the fallout. I am also worried about the limp mode from the other code.

My nozzles are located in the standard position on the STETT CP, with the smaller nozzle located closer to the TB.

[ttbmer]

Originally Posted by BMWorNOTHING

1

I was like wa!!! And looked at the threads date like 5 times

[E92TTKING]

yayayaayay clap is back

[Jeff@TopGearSolutions]

Originally Posted by B_davis

From my calcs I am spraying about 650ml/min of 80/20 meth/water. Using the cobb 93oct V202 map, I am swapping out to smaller nozzles as we speak. I had a precat 02 go dead a couple weeks ago after cleaning my valves, I am just wondering if this is the rest of the fallout. I am also worried about the limp mode from the other code.

My nozzles are located in the standard position on the STETT CP, with the smaller nozzle located closer to the TB.

You know there is no substantial gains running meth on Cobb Stage 1 right? Spray 1 small nozzle farthest from the TB. Like M5 (5 GPH) nozzle.

[B_davis]

Originally Posted by Jeff@topgearsolutions

You know there is no substantial gains running meth on Cobb Stage 1 right? Spray 1 small nozzle farthest from the TB. Like M5 (5 GPH) nozzle.

I don't know why you keep saying this? I understand about the load targetting, but there has been significant gains in the butt dyno as I went to a more aggressive Meth/water mix as you suggested. I no longer see 170 IATs at the top of 3rd, I don't feel the timing pull anymore, and I can beat on it all day with no fall off. I am still hitting 16.5psi peak around 3.5k-5k rpm, I am not seeing any less boost even though my IATs are nearly 100 degrees less. Ask anyone who has ridden in my car, theres a huge difference when I am spraying.