IS IT NORMAL FOR 5.4L ENGINE TO REV UP HARD ON COLD START UPS. IT QUICKLY IDLES DOWN TO NORMAL BUT SEEMS TO OVER REV AT FIRST. ALMOST LIKE HAVING FOOT ON GAS DURING START UP. ALSO HAD TICKING IN ENGINE. HAD DEALERSHIP WORK DONE. THEY REPLACED CAM PHASERS BUT STILL HAVE TICKING..ANY MORE SUGGESTIONS.

 

How high do the rpms go?

 

My truck does it to and it is completely normal. 100% normal

 

Mine does it as well.

 

Yeah same here. It's normal

 

should go to about 1600-1800 on cold startup. If you are paying attn your shifts take longer first thing in the morning too.