I've replace the cylinder head on my 87 4Runner.

Marks on the timing chain/cam valves and distributor are all where they should be.

I checked on the fuel injectors, they are in in place.

New plugs and wires.

If the timing is changed on dist..there is a backfire that blows off the air clean hose.

Seems to be suction on tailpipe.

I've adjusted the chain several times and I still have no fire.

Please, any suggestions are welcome.