Recently, when I WOT (Wide Open Throttle) the car, the check engine light comes on and the car goes into limp mode. Turn off the car and turn it back on and it goes fine except when I WOT, the car feels like it has no power.

I changed the MAS a year ago so i'm suspect on whether it's the MAS again.

I have a few question if someone would be so kindly to answer.

Does a plugged fuel filter set off the CEL? (What are the symptoms of a plugged fuel filter?)

Can bad coil ends cause the CEL to come on?

I went under the hod of my car and added revved up the engine. Each time it revs I hear a hissing sound. Is this normal or a vacuum leak somewhere?

I haven't had time to pull the codes but I will this weekend.

Thanks,

Rocky

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1997 Silver AMG C36
OEM Advantegarde Grille
OEM Clear Corners
W210 Blinking mirrors
Eibach/Bilstein Combo
Zender Rear Lip Spoiler