Smooth_J

Now that the other issue has been fixed...

I have another one, but this has been going on ever since I had the car. At high engine RPM my engine, or something from the engine bay anyway, starts to crackle. I have no idea what it could be.

Any suggestions?

Chopper

High RPM detonation could be heard as a crackling kinda' sound.If the Predator tune calls for 92 octane this might be the source.
If you can get to a dyno,do a couple of pulls to see for sure.The power curve will drop off or flatten out as the detonation begins.

sitnlopro99gt

detonation?

Frostbitten

If you are running at least 91 octane, you shouldnt be having any kind of detonation problems. Clean you MAF sensor and make sure the intake tube isnt leaking air anywhere. Also clean your IAT sensor if you have one. Make sure theres no vaccum leaks and you should be fine.

Dan04COBRA

Reinstall the factory tune and see if it does it still.

Smooth_J

I always use 93 octane gas (either from Shell, BP, or Exxon).

Is there anything else I can do/check besides cleaning/checking the MAF and IAT?

Also, I rev the motor at high RPM in park, and I don't hear that noise. Could it just be vibration, or does the engine need to have a load?

Smooth_J

I'll retard my timing by 2 tonight to see if that fixes that issue.

ben790450

+1 on the cleaning. Just make sure you arent running too lean. You shouldnt be if you havent messed with the fuel stratagy on the tuner. Also i have seen some dudes that advance their timing all the way that diablo will let you and then wonder why it knocks and pings. Haha i just wait for them to blow a cylinder out their hood!

JJ03MustangGT

u might try runnin 89 octane.

korn253

unless u have different heads, u should just be using regular unleaded, and this is wut a ford mechanic told me, he said that it will do more bad than good if u run a higher octane