95ish Cavalier won't start

[tweak1029]

To save some time: I don't know the exact year model, nor the exact engine (although I'm fairly certain that it's a 2.2, because the base models have the black bumpers and the others don't, and this one has them.). It is my friend's aunt's car who plans to sell it to a salvage yard. She has a maximum offer of $300 from a salvage yard, and she'll sell it to me if I can match that price.

The way she described the problem and the steps (which lead to more problems) to solve it is ambiguous, so please try to bear with me.

She had a leaky injector, boyfriend looked at it, took it out to check the O-ring, O-ring was fine, he replaced it, then the car wouldn't start. Boyfriend took out all of the spark plugs and spark plug wires at the same time (don't know why he did that > ), air filter, oil pan, alternator, what looks like the water pump, and some more stuff... Oil now has gas in it.

First of all, I'd like to find the reason as to why the car might not start after taking out, inspecting, and replacing an injector. Google didn't seem to have the answer, so I'm asking here.

Any help is greatly appreciated. I apologize for the vagueness. The woman isn't very technical and all of the work was left to her unattended boyfriend.

Thanks in advance.

[muff34]

let it go to scrap yard ,sounds like you wanna buy a migraine headache

[tweak1029]

Maybe, maybe not. I was told it hasn't been driven with gas in the oil, and I'd like to get a car for messing with. If the main problem (why it won't start) is unfixable, then I could get an engine and it would still be under $1,000. If I'd rather not do that, then I could simply take it to the scrap yard later and get my money back.

[muff34]

well sounds like you can definately get your hands dirty then. One bad injector should not stop it from starting ,it`ll run like crap but should run. there must be someother reason for it not to go. Check it for spark and also fuel pressure. sounds like the injector or injectors allowed it to dump way to much fuel into system and contaminated the oil. Good luck with this