Hi I am installing a new hpop does it have to be timed just wanted to make sure Thanks also it was running great and started missing at Idel and would run once got it going but if let it sit it would eventually quit it had a new ipr egr valve ok new fuel pump and filters any way I was woundering is there anything thing else I need to look at while I have it tore down Thanks

 

It just makes pressure to fire injectors so no it's not timed. If u didn't get pump yet try diesel site billet pump. I love mine so far!