i replaced my knock sensor and now my truck wont start
its a 90 toyota 4x4 v6
its getting spark from the coil and from the plugs and its getting fuel
so the coil is good
would the ignitor poissibly be bad

i dont know if maybe the timing belt got off track from having to remove the belt spinner between the two camshaft pullies?

any help is great as i dont want to take it somewhere

it turns but doesnt start up

and also is the mass air flow sensor supoose to make a tap tap noise when trying to start

 

need help please

 

Did you try putting the old sensor back on and try starting it?
You might have a bad sensor, or some of the wiring got crossed, loose or cut during the swap.
I would double check all of your connections.