New s14 owner need some help!!!!

Hey guys ive been looking through this sites threads and you guys seem really helpful so i decided to post this seeing as i need some help im an aspiring technician trying to save some money for school im currently a restaurant employee (weeeaaakk) and i have been looking for a 240 for about a month now after i crashed my 98 altima. i found a s14 in miami and got it for 1800 i needed a car quick on account of rough circumstances (being 19 wit shitty job living on my own paying bills struggling etc etc...) so i bought the car at night (dumb i no) lol and it drove nice it has custom 2.5 ceramic headers magnaflow muffler to a 3" tail pipe dropped 2.5 on eibachs stage 2 clutch with nismo short shifter he wanted 22 and i offered him 18.. so anyways to the point i really love the car and it needs some tlc but the engine runs strong so i checked out the car a little bit the morning after i bought it and noticed alot of gunky buildup on the bottom end... so i took it to a little ghetto shop and got it on a lift for a closer look and theres oil leaking from the oil filter and the ouput drive shaft seal also the rack and pinion looked real tore up so i just wanted to get an idea of how much this is going to run me cause the guy said to fix the leak from the filter it was $350 because of a motor mount in the way so like i said im a bit of a noob but i jut want to make sure these things arent to serious so my baby dont break down on me... thanks in advaned guys

sry forgot to mention the idle fluctuates very slightly from about 900 to 700 only once in a while if i open her up to much and the car shekes a little bit when i drop in in gear... any other reccomendations to help the car drive a little smoother for now until i get some real money for sum PROJECTS!!! cant wait hope to hear from you guys thanks again!!

My car was doing the same thing, i.e. rough idle and power drop between 700-900. My fuel pump was down and needed to be replaced. Also, Im pretty sure I was down a cylinder. I would pull the spark plug cord out of the 1st cylnder and nothing happened. (All other cords would cause a rougher idle).

Here's what you should do: Take your car to a Nissan dealership, get an oil change, and they'll give you a 35 point inspection and tell you whats wrong with your car. The service tech straight up told me that it wasnt worth fixing everything wrong. It was gonna be like $7000 in repair costs.

Good luck though man.