i was drivin my car around today and all was well. i parked it for an hour, came back and started it up to leave. i noticed it was idoling at around 2000 rpm, and wouldnt go down. i turned it off and tried to start it again and now it wont fire. it trys to turn over, but wont fire up. i just did headers, new msd opti, plugs and wires. its pissin me off bc it crapped out within a matter of 3 seconds. i pulled a plug wire and it did have spark, but i dont know if it was enough... i dont know how consistant the spark should be, im still learning. am i correct in assuming a coil? thanks

 

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you have a fuel issue then. your coil is good, if it wasnt you wouldnt be getting spark at the plugs. and you are obviously getting air. check your fuel pressure

 

also check for a vacuum leak. i would say that because it was idling at 2k the first time that that has something to do with it.