backfire

Hi, here is my problem, 87 Ford Bronco ii is backfiring every time that I started untill it gets to normal temp. Please help.

Unplug the sprout and check base timing. Then when it plugged in make sure the computer is advancing the timing.
A break in a plug wire will cause a back fire but this would occur after its warm.
How bad is the back fire?

the backfire is pretty bad untill the car get to normal temp .

Hi, heres my problem I dont know your eng I dont know if FI or not, but if I were to guess could be vac leak causing lean when cold not as noticed when warm , could be temp sensor messing with brain when cold, could be EGR valve. Are there codes?obd1 still can code map sensor etc. may be this helped dont know