Dude.... when you do the math it'* almost always cheaper to fix a car than to ditch it. I have 4 cars... Mostly because I'm stubborn. I hate car payments and new vehicles (they're worthless). I just bought my wife a '04 Lexus Rx330 for 5 grand less than blue book so that'* our nicest car. The car I drive everyday is a 97 VW Passat TDI with 347K miles, my alternate car is a 2000 Buick Regal with 233K miles (I dropped a used engine in it 7 months ago after the original died and it'* still kickin), and a 97 Camry with 168K miles (will go to my Son next year as his first car). I haven't had a payment in 10 years. Any idea how much money that'* saved me? Wanna bet what I've paid in repairs is MUCH less than what I would have paid to buy new each time a car made me want to get rid of it? You'd win.. Cars are the WORST investment in the world especially for the low/middle class. They are likely the second most expensive thing we'l ever own and also the thing that has the least value on day one of the purchase other than some goofy warranty backed comfort level...
Heck, maybe you don't keep this one, but remember. These machines will take a LOT of abuse and will run longer than people think. I expect to get 500K (that'* my goal) on the VW.. and I'll keep fixing the Camry and Regal until I get tired of them, i can't get parts, or rust is causing the motor mounts to fall though the frame. Fix your car issues, and spend your money on real estate (long term).
My first car was a 87 Volvo 240 DL. I sold it for $100 bucks with 260K miles on it just because I hated it and wanted someone to pay me to come get it.. That car was tough as nails though, it developed a hard tranny shift at about 190K miles and I drove it another 70K. Durable as heck.. The guy that bought it off me, drove it for a couple years before he wrecked it..
Take it for what it'* worth my friend..