So the other day i blew my 20 amp engine fuse. it completely made my car stop running.
So i replaced it and today i blew it again. whats going on here?! I noticed that it blew after to got on it hard for a few mins (throttle) both times.

Thanks for any input.

 

the first thing that i would check would be the ground wires for the engine then check for any bare wires that could be shorting

 

i just wanna say it that blows, and hopefully youll figure it out , i got that same problem but with my dumb fuse block is all screwed up

 

Not seeing any bad wires. Could it be one of my coils may be going bad? It only blows when i romp on it for a bit.

 

Ele fuel pump surging, sensor shorting out, do you have AC, bad alternator? also might wanna check for bare wires shorting out in the engine bay and or loose pos battery terminal. Good luck

 

Something's shorting to ground. Look around for wires that may be laying against hot engine parts. Look for wire casings that are cracked or hard from the heat. What year/model/options do you have? Overused lazy clich'e ahead..."Study your wiring diagrams". No really. For example I recently spent quite a bit of tears and frustration trying to figure out why the automatic tranny shift solenoids in my ford taurus kept shorting out their fuse when driven hard...inspecting and testing everything. Then I found a wiring diagram showing the fuse also protecting the heated O2 sensors, come to find out the sensor wiring was laying on the rear header. When the wire casing got hot enough it quit insulating and started shorting even though there was no exposed wire. It's not an RX-7, but it just goes to show how easy it is to overlook the simple things.

 

I had this problem it it was the choke and check relay shorting out. It is one if the relays mounted on the drivers side under the hood near the clutch master.

 

update... I feel dumb... lol... I was checking stuff out. my battery cables werent very tight, tighten them up and it stopped doing it. for now unless it does it again but so far so good.

 

Loose terminals FTW =P