GF's daughter has 2000 Prizm non ABS. Says pedal to floor, stepped on it twice, hit car in front at light at low speed. Had her friend drive it around corner..had to creep it super slow and had same no brake. I got there..cop gone. Master full, no leaks, brakes fine. Drove it home right behind my truck .. no issues. Master cylinder is full, zero leaks anywhere. Pedal is fine no matter how you try to test it. Zero sponge. Only has booster, master, proportioning valve then lines to calipers and drums. Only thing I can think of doing is replacing master and fluid..bleed all. Just doesn't make me feel good though. Have done some searching and cant find much else to help. She just turned 20 it was on her bday.. went through the it didn't happen stuff. She was so shook the cop had the friend take it around the corner. That part bothers me.. why would cop have the car moved. But have to work with what I have. Thanks for any help. Super tired hope this reads right.

Hi everyone. 2008 Hyundai Elantra. Couple of months ago my upper radiator hose blew up, and sprayed coolant all over. I replaced it, cleaned up the mess. Or so i thought. Recently car started misfiring. Checked the codes, pointing at misfire in cylinder #4. No problem, got spark plugs and new wires. When got to #4, i saw rust and water. Got spark plug out, used paper towels to absorb water. Car runs good, not misfiring anymore. Question is, do i need to do anything about the corrosion in there, or worry about it at all. The spark plug's electrodes were wet , not the terminal where it connects with the wire. And it's from coolant getting in there. So what do i do now? Thank you.