my brother blew up his engine. we swaped it out for the same d15. replaced all the things you should. put on a new timming belt and it was off 3 teeth!! fixed that and it doesnt run right still and the exhaust sounds really raspy. when its just sitting there at a idle it will back fire. and hes only getting 225-250 miles to the tank of a d15. any ideas? 02 sensor ?

 

The O2 sensor won't cause symptoms that severe. You've still got a major timing or fuel issue going on there.

 

all the timing marks line up. should i move my dizzy and see if that helps out at all?

 

 

noone?