mau

an Eclipse)please help. I know everyone is gonna beat on me about the injectors. What to do?
Ps. This is the first time it happens after the kit was finished.

4kq

If you are not very careful about the octane (that is why it pings, not lean; lean will just melt the pistons and burn the valves), you will damage the motor.

Mike O.

...if you are at all lean, it will ping. Obviously, the extra O2 in the mix isn't good for aluminum but that is the end result of running for a longer period of time with a lean mixture.

Mau, what injectors and programming are you running? Any idea what your O2 sensor (pre cat) were when this happened?

Please post some more details so we can help.

Mike O.

mau

I don't understand, the temperature? I don'have a cat. O2 sensors are connected to it ...I'm running an ATP chip w/ 310cc injectors. I really need some help on this.

Thanks,
Mau

dingster

Do you have VAGCOM? You want to log block 43. It tells you your RPM, Precat O2 Temp, Precat O2 Voltage. You want the voltage to be above .83.

AFAIK the ATP kit uses injectors at least in hte 400cc range. Last time I told you your injectors were too small you got nasty on me. I'm just trying to help you. Datalog that block to see if you're running lean.

Running lean will cause the combustion get really hot and amplifly the hot spots in the cylinders and help detonation. Also running cooler plugs will alleviate that as well.

4kq

Sure, if he is running really lean (at WOT, since the O2 sensors would cut it back otherwise), the chamber could get so hot that it pre-ignites. But by running that lean, for ANY length of time, would literally melt down the engine. These are cast pistons. (The fuel also acts to cool the combustion chamber past stoi.)

On the other hand, an agressive timing map will induce ping/knock regardless of the fuel flow. This engine seems remarkably resistant to this kind of damage.

It would be easy and entertaining to test. Run full-throttle in 3rd and see if she blows (lean). Tip the throttle back slowly and if it stops pinging at a set pedal position it is the timing/octane.

Or, if you are not so adventurous you can pull out a plug and see if the metal is discolored. Or, run a cheap O2 disco light.

dingster

I kinda think running a T3/T4 on 310s @1.4bar would get you to the really lean range. I'm just speculating. He should log the O2 voltage or look at the plugs like you said.

CMH

I also told him the injectors are too small. He should start with a 440 or 510 injector. But he can also just ask smokingA4turbo since he has the ATP kit on his car.

mau

was because the car did run good...(until today =(

Can I just change injectors without adjusting the chip with it?? Will a FPR help with the 310cc now?

mau

I don't have one but a good friend works at the dealer.