V8 Aggie

So I just installed the 93 octane tune with my xcal 2 and I notice a huge difference.

But, there seems to be a wierd noise around 4k rpm and up in first and a lil in second.

The noise sounds like a "hot" wire being moved accross a peice of metal with sparks going off.
That is just what it sounds like and is the best I can describe it.

Thanks

Maybe it's because it is could and the engine is not that warm

Please help me and let me know if it's ok. Thanks again

andyman

you might be hearing the exhaust popping...it does that when the engine is cold. and when it is hot too

V8 Aggie

But is this sound not deep at all. The sound I hear is well, kinda like the little poppers you can buy at a gas station that are those little rocks wrapped up in the tissue paper that you throw down. If you could imagine alot of those being thrown one aftwer the other really fast than that is it.

Thanks

05HOTROD

YOUR CAR IS RUNNING TOO LEAN, IT'S NOT GETTING ENOUGH FUEL AND WHAT YOUR ARE HEARING IS THE CAR DETONATING (PINGING). YOU NEED TO CORRECT YOUR TUNE OR YOU WILL EVENTUALLY BLOW YOUR MOTOR.

hawgman

Kind of tend to agree with 05HOTROD, sounds like you are possibly getting detonation. Might want to swing by a dyno shop and do a verification pull just to see what your A/F ratio is up on top and make sure it is not leaning out.

M

who did your tune? have you contacted them about this and what have they said? they shoud be able to correct the problem and you should just be able to download the new tune from your cpu via the usb cable.

Fourth Horseman

Assuming you do get an updated tune from your provider, in the meantime you might want to flash your stock tune back to the PCM rather than risk any possible damage from running lean.

V8 Aggie

well, after running for a day it seems to have stopped.

I got the xcal 2 from brenspeed and I am running a tune for 93 octane with a stock airbox.


Think it is still safe?
I can't really go back to stock tune b/c I have a full tank of 93 octane in it.

M

its ok to run 93 with the stock tune, you just dont need it.

give brent a call, ive dealt with him and he seems to be a stand up guy, i dont think he will let you hanging.

gald to hear everything sounds a ok, just keep an eye out till you talk to brent

ren274u

Since he has the XCAL2 cant he use the datalog and check the knock sensors?