EVO 8 Randomly won't start
 

I'm having a problem where my evo 8 won't start, but it doesn't happen all the time. I have been trying to see a pattern to when it won't start but it seems completely random. I started the car up this morning and it cranked right away. Then I drove to get something to eat and on the way back home I stopped to get some spark plugs. After I got the spark plugs the car wouldn't start. I was in the store for about 10 mins. The altenator is good, the battery is good (but on it's last 1/4 of it's life after < 1 year), and the starter is kicking out but not spinning. If I get the car jumped off from someone else's car it works all the time. I have a viper alarm with a pager fob, exhaust and intake. It was doing this before I put the exhaust and intake on but it's done to the car so I'll put it down. Any help would be much appreciated.

Same issue here bump for help i think its with viper alarm mayb i have a viper alarm also and randolmly tge car wont start sometimes

Check the terminal connections to the batter. Make sure they are clean and tight. This happened to me a week ago. My terminals were corroded and loose.

You also may want to check the starter signal wire. Mine did this for a while due to a loose wire connected to the starter.

I am going to bet it's the alarm.
I scored a probe GT for free when I was younger.(had a viper alarm)
It wouldn't start, girl said she drove it to work and when she went to leave it just wouldn't start.

Long story short, I took it, towed it home, put a new battery in it, still wouldn't start.. got pissed ripped out the alarm, started right up.

Cleaned it up, sold her ;)

I had the same issue abd I have a viper alarm also. I got under the car and tightened the wires to the starter and bingo problem is gone.