Having issues please help

[Miata Master]

Ok I finally got my RB on the road and here is what is happening. When I first push the gas the car dropps in revs. I dont have a working tac so this is how it sounds. idle 7-800ish then I push gas and it goes down to like nothing maybe 400 and then shoots up. also when I rev it to lets say 4500-5000 and I let off when it comes back to idle it dies or atleast dropps to like 300 revs or less. If it doesn't die it will return to idle after falling to 300ish. I was thinking maybe the O2 sensor or the IAC valve. any thoughts. also I dont have an adjustable FPR yet so I am running real rich.

Thank you

[Slo_240sx]

Youre Bogging out bad. Sounds like your timing is WAY off or you have some really low fuel pressure. Try adjusting your timing and change your fuel filter if you haven't done so. Then check for fuel pressure. -Alex

[Joe]

everything connected?TPS, MAF?

whats your timing at?