Today my 4runner suddenly had bad timing after reversing. After i timed it, the distributor can't turn anymore. I didn't check the tdc yet, but im pretty sure the chain jumped. Is there an easy way of resetting the chain back to center?. Or do I have to take the front all apart?

 

If it jumped once what makes you think it won't jump again??? I doubt that it did jump a tooth. You do need to check the crank keyway and the cam sprocket dot to know for sure.

What did reversing do that moving forward doesn't do???

 

I was rolling forward and then threw it reverse. The timing is bad, the distributor can't turn anymore.and I see the knotch at under 0.

 

First thing, verify that crank to cam timing are still correct. We can go from there.

 

K, I checked tdc and cam sprocket and distributor lined up. I checked the timing again and it is still under 0.