chris rx7 gsl-se

iTrader: (1)

i have a few problems i think, i started my car it will rev up and then die over and over, when i turn key just before starting i can not hear my fuel pump. Also im having problems keeping power to the car i will go to start the car and it just chunk and i lose all power to the car, i can mess with batery cables and get power again but then it keeps doing it and not it wount start.
thx for and ideas,i assume my fuel pump is bad also my batery cables need to be replaced with alum ones.

Rx-7Doctor

iTrader: (13)

Your fuel pump does not come on until you start cranking the engine.

As far as the electrical issue. You either have corrosion on the battery posts or cables, or your battery is failing.

Clean cables first. If that does nothing then have battery tested.

rxtasy3

iTrader: (2)

clean and tighten the cable connection to the battery. if u can twist the cable on the battery post, they're not tight enough.

Kentetsu

I would go ahead and replace the battery cables. They do tend to corrode over time, so this is just good preventive maintenance. Standard cables will do fine, don't make the same mistake Mazda did and use aluminum. I used the heaviest gauge cables that Autozone carried, just grab the proper length and go to it. Chances are this simple upgrade will eliminate all kinds of small issues down the road.

If you still have problems after that with keeping her running, then check for spark at the plugs. If the trailing spark isn't sparking, then the fuel pump won't run.

Good luck.

KansasCityREPU

iTrader: (9)

I just replaced my cables with ones from Tractor Supply. I used a 48" 1 gauge for the negative cable and a 2 gauge 48" for the positive. I also used an additional 18" positive cable to go from the positive terminal to the second gen fuse block and a 24" negative cable to connect the shock tower where the factory connection goes. Overall it solved all my battery problems. I had originally just put new battery terminal on the factory cables but they where very intermittent.