I have a 86 mazda B2000 that dose not want to idle

i got it about 2 mouths ago it did not idle when i test drove it got it home idle and drove nice it has been setting about a mouth now. (waiting for a title)try-ed to start her, very hard to start and will not idle. she dose run smooth about 2000 rpms but dies as soon as you let off the gas.

the egr light is on
any thought where to start?

most every thing else i have worked on is older!
Is this truck a OBD1 set up


thanks
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Hey, did you look for any vacuum leaks or anything like that? Have you checked your fuel pressure regulator (fpr). I would clean your IAC (idle air control valve) or just unplug it and if the idle does not change, then there is your problem. I would also check your timing too, good luck