I just finished having my head rebuilt after 2 valves burned. Everything went back together good with no problems. Vehicle started right back up after complete. Engine idled great about 15 minutes until I tried to drive it home. The vehicle ran great above about 1500 rpms while driving and began to idle very rough. I was able to make it home, about 10 miles, then it began to idle even rougher. It never did die while idling but was not smooth at all. The vehicle finally had the CEL come on while at home. The code was a P0014 which is a cam position sensor. Im sure this has something to do with the VVT, not sure if I got it set up exactly right.

I was able to check the timing marks that night and they were still perfectly lined up where they should be. I am not sure how to check to check to make sure the VVT is set up properly.

I went out today checked the timing again and everything was lined up properly. I started the vehicle and it started right up with no problems or hesitations. The engine ran very smoothly at first. Once the engine got warmed up it began to run rough again.

Any help or ideas would be greatly appreciated.

 

Any thoughts from anyone this issue yet.

 

The VVT pulley might not be on properly.
Also was the lifters hydraulic or solid?

 

These are hydraulic lifters. They were reset by the person who rebuilt the head.

 

Ok that's good then that they are hydraulic.
And from the other post might be CPS.

 

Replaced the Cam Position Sensor today and did not make any difference. Once again after warming up it begins to run rough again. Does the VVT change position based on the temperature of the vehicle?

Plan on doing a compression test tomorrow to see if anything is abnormal, dont know why it would run great though initially then.

 

The VVT changes position by oil pressure as per the ECU requesting the timing change from conditions.

I wonder if the VVT is off a hair causing the code?

 

I do not have any ideas on what it could be and dont have the tools to reset the valve. I will have to send it to a mechanic later to see what they can diagnose.

Tried moving the exhaust cam 1 tooth both directions today and it ran worse in both positions. I think the cams are lined up properly think its just in the vvt probably.

I just cant figure out why it starts up fine and idles good until it warms up for a while.

Thanks for everyones help.
I will post more when I get the car back or get it fixed.

 

Did you see the post about making your own cam lock tool?