Paid $3000 2 years ago for auto repair.

You don't way why you haven't been able to use the car since it was repaired. Why haven't you been able to use it?

I bought a car from a dealer a day later check engine light comes on an front light out they said they would fix but wont now

Well, and you are surprised? Why? Don't you know what car dealers ARE? And your question is what? Can you return the car? Can you make them...

Maybe yes, maybe no, hard to say. You should send your papers to me and I will try to figure it out. It's an awfully high mileage, and it is not...

Rhino charges, blindly! Rolling back odometers is serious business, if it can be proved, $10,000 statutory damages under the fed. Odometer Act. ...

What can I do?

Since he already told you that he won't take it back, your only other option is to take him to court. "Revocation of acceptance" and "cancellation...

Can I sue a dealership for not disclosing that the car I bought has a salvaged title?

Sue their pants off. This is fraud. Ask for punitive damages as well.

What used car laws are there in Illinois if you can not use the "Lemon Law"?

Breach of express and implied warranties under the Magnuson-Moss Warranty Act.

Bought a used car from a lincoln dealer in Westmont Illinois and the check engine light came on as soon as I got it home?

And your question is what? How to fix it? Whether you can sue? What your claims might be? The meaning of life?

Would it be in my best interest to let the car go back?

This is not a legal question, this is a business question. You would arguably have a claim for revocation of acceptance and cancellation of...

How to get out a joint car ownership/car loan?

Short of contacting a family law lawyer and going to court, I see no other way.