2G Cel p0300 then ignition fuse blows

[Jacolu3]

So first off my car is a 97 gsx. Only mods are 3" turbo back exhaust, hks bov recur'd, and an open o2 dump. I recently replaced plugs(ngk gapped to spec), and wires (magnacor), fuel filter, and pcv valve.

So last night I was driving home and I went to merge onto the highway getting on the throttle and all of a sudden I lost power and the check engine light went on. I immediately pulled over and checked the code. Came up as p0300 (random/millipede cylinder misfire detected). Opened the hood and pushed on all the connectors and plug wires to make sure they were making a good connection. Everything seemed good so I tried to start it up and it started and idled good. I reved it up while sitting the on the side of the road and reved good no issues. I started driving again and about 2 miles later of normal driving the cel came on again. This time tried the same thing but did not solve the problem. I decided to drive the 2 more miles to my home basically forcing the car to idle. If I took my foot off the gas the idle would stay at about 100 rpms. I got about 1/4 mile from my house and I lost all power and smelled a burning smell(electrical). Turns out I blew my ignition fuse some house (40 amp under the hood). Towed it back to my house and replaced the fuse and the car started up but idled like crap. Shut it off and pulled the plugs. The cylinder 1 and 4 were pretty black from the misfire.
I know this code comes up a lot but any idea why the ignition fuse would blow after driving about 2 miles?

Thanks in advance

Brian

 

[Jacolu3]

Could it be the coil pack?
Anyway to test the coil pack?

 

[Jacolu3]

Anyone?

 

[estoyaqui30]

I would check all of the wiring to look for damaged wires. If you smelled something burning and it blew a 40 amp fuse, that's a pretty large fuse to blow. I'd look for a wire that might have cracked broken insulation that is bumping into some bare metal.

 

[luv2rallye]

Probably a short: http://www.dsmtuners.com/threads/finding-a-short-partial-short-or-battery-drain.179481/#post-1496998

 

[keltalon]

Probably a short: http://www.dsmtuners.com/threads/finding-a-short-partial-short-or-battery-drain.179481/#post-1496998

Definitely a short! Where is your coil pack mounted? Check as stated above for any loose wiring that may be arcing.

 

[Jacolu3]

Definitely a short! Where is your coil pack mounted? Check as stated above for any loose wiring that may be arcing.

I just recently bought the car and the coil pack is sitting between the fuel rail and the intake manifold not really bolted down. I can slide it side to side. I haven't really seen anything that stands out but I still need to look more.
Since I'm a little nutty I've already ordered a new coil pack, new tps sensor, new plugs, new power transistor, new MAF connector and the dsm connector kit from jnz. I don't want to take any chances so I figure I'll just slowly change everything to new. Hopefully avoid any problems in the future.

 

[Lou98GSX]

That fuse is for the alternator feed . just to make sure see if you have power to the alternator its the large gauge red wire .If you have no power there then i am right . the problem could be a bad alternator or a short in the wiring . You might have to disconnect the alternator red wire at the fuse and alternator and run a jumper wire to bypass the circuit to see if its the alternator or the wiring that is shorted .

 

[Jacolu3]

You must be logged in to view this image or video.

Well I think I found the problem or at least a problem. Removed the coil and found that one was melted on the 2 and 3 cylinder. Replaced it with a new one and I also replaced the connector and pins. But now my battery is dead. Starter just clicks and doesn't turn on. Have to get the battery charged and see if this fixes the problem.

 

[97gsxawd_1290]

Hi sorry for just hopping in here but idk how to start a new discussion haha. I have a 97 gsx with je pistions and rods and hks crankshaft. Recently i was driving my car and heard a pop sound turned out my stock turbo manifold cracked. Ever since then ive had a misfire in cylinders 2 and 3 as of the coil pack not firing correctly. Coil pack for cylinders 1 and 4 spark fine. Have replaced both coil packs several times with new ones and still can only get 1.4 coil pack to fire no matter what coil pack is in its place. replaced spark plug wires and plugs as well as the obvious coil packs. please help haha

 

[Jacolu3]

Maybe check your igniter. On my 97 Gsx it's right by the throttle body. I ordered one off eBay when I was troubleshooting just to have a spare. Think I paid about $20 for a used one. It's worth a shot.