Engine won't run with new top end rebuild

[Clint Boka]

I have installed new cams .630 lift , new 5.3 injectors, new plug wires, and had heads drilled for new acr's engine will turn over but it's not starting it's wanting to run but isn't front cylinder is wanting to fire but isn't has anyone had the problem before !!
Thanks Boka

 

[tourbox]

Welcome from So. Texas. What year is the bike & model? More info needed.
tourbox

 

[Clint Boka]

Welcome from So. Texas. What year is the bike & model? More info needed.
tourbox

2008 flhr road king 107 cu.. have changed cams before have never had this issue before !
thank you

 

[tourbox]

I know it will be a lot of work but recheck your mechanical timing of the cams and cams to crank shaft.. Also if you have a spark tester test for spark first. You won't see any spark with plugs out of heads.
tourbox

 

[Clint Boka]

I know it will be a lot of work but recheck your mechanical timing of the cams and cams to crank shaft.. Also if you have a spark tester test for spark first. You won't see any spark with plugs out of heads.
tourbox

We have checked the cams and crank timing I was told that maybe the webbing on the top rocker box maybe hitting the rockers and causing this issue maybe not letting the rocker fully open ? Thank you Sir

 

[Breeze3at]

Make sure your plug wires are in the correct coil terminal.

 

[Clint Boka]

Make sure your plug wires are in the correct coil terminal.

I would not have thought of that we did change plug wires to 10mm wires hmmm maybe they are in wrong place !!!

 

[flusher]

Welcome

 

[dolt]

We have checked the cams and crank timing I was told that maybe the webbing on the top rocker box maybe hitting the rockers and causing this issue maybe not letting the rocker fully open ? Thank you Sir

This could be the problem but easy to check. Try starting with both rocker covers off. If she fires up, problem solved; just clearance the rocker boxes in the corners where the valve springs are. If there is contact, there should be witness marks. You could also try disabling the ACRs, if something is wrong with wiring, the ECM is not getting the start signal. I assume that the cams are not EZ start? Check compression and report back. If plug wires are wrong, motor will spin and back fire but will not start.

 

[dolt]

Here's another thought. If the right valve springs were not used, the valve stem collar could be hitting the guide seal which could damage the top of the guide and cause a valve to stick. Check compression.