Need help on my 85 bronco?

i have a 85 bronco that the timing is not right ,i pulled the number one plug and put it on top dead center and the balancer was at 0 tdc on the mark and i put the dist rotor facing the number one plug an tried to start it and it backfired out of the carb someone told me that the timing chain had slack in it, could this cause the timing problem? and when i tried to time it at 10 deg btdc like the book said it would not even run and when you went to accelerate it would barely rev up i guess my question is what can i do about this change the timing chain?
Need help on my 85 bronco?
6 degrees.
Need help on my 85 bronco?
if this is a full size bronc with a v8 its real easy to check the timing chain with out opening anything--in the center of the damper is a large bolt with a head af about 1 3/16" .with the ignition key off and for a little more safety-pull the coil wire out--take a breaker bar with the socket and probably a short extension and put it on the big damper bolt-with the distributor cap off turn the breaker bar to the left until the dist.rotor moves==then move the breaker bar to the right-until the rotor turn-if the chain and upper gear are good= the rotor should turn as soon as you move the breaker bar=a little play is normal. if you move the breaker bar handle anything over about 3/4 of an inch before the rotor turns-the chain has stretched and should be replaced as a timing set-crank gearcam gear and chain. another thing is those broncos had a wierd way of setting the timing-i dont recall the procedure from here at home-but its in any chiltons manual. you dont just diconnect the vaccuum line and set the timing-that should have the eec system with the module mounted on the dist. body, one other thing-are you sure you were on #1--cuz fords are the opposite side from gm. i.e. chevy

lilac