I bought my rx7 a few days ago and it ran great but then the car died and i couldnt get it to stay running which i found out the alternator went out so i ordered a new one (will be here in a few days) and i jump started the car and let it charge off the alternator on the other car which worked to get it back into my driveway but i charged the battery completely and it wont start now even if i try to jump start it it just cranks for a few seconds then the battery is dead im thinking the starter is done for but i want a second opinion before i drop $100 on something i dont need

 

have your battery tested.

also, charging the battery with a jump vehicle takes a while and the rotary car starter system is very demanding of a good condition fully charged, healthy battery.

 

I tried with 2 different batterys and had the same result but i dont know how charged the second battery was because i havent used it since new years but i put the battery on the charger last night and i will try it again when i get off work in 6 hours

 

Well i think the ecu is bad i was cleaning it out and found moisture on the passenger floor im going to pull it to see if it has any damage that i can see

 

The ECU has nothing to do with the engine turning over, only running

 

I had gotten it to turn over but it would only run in short 2 second bursts but i pulled the ecu about an hour ago and its fried im going to get a replacement one from ebay on Thursday when i get paid