ugh...my family car is falling apart, please help

**Impala131** · 08-15-2015

Originally Posted by formulafbomb

I bought a 98 GTP with 140k miles on it a few months ago. Runs good, drives good...etc Well now like 100 issues sprung up out of nowhere.

First, my girlfriend drove it through a large puddle and the p0300 code appeared. After a few days it went away but still had a nasty misfire at WOT so I changed my plugs and wires and it ran fine without the miss.

Now the p0300 code came back with the same WOT misfire but now it's accompanied by the p0442 vacuum code.

Also my ignition switch won't turn all the way off. It turns to the spot right before off and let's me remove the key but I can turn the car on without it. Now I have to lock it all up every time I leave it.

There are other issues but I'm really only concerned with the ones I described here. Thanks in advance

The P0442 code doesn't necessarily have anything to do with the misfiring or P0300 code, it's actually pretty common if you have any significant rust on your fuel system, or just a bad gas cap if you are lucky.

For the P0300 code, you might want to check to make sure the ICM and coil packs for any rust or water damage.