Hi there,

losing coolant ~ 1L per month doing ~ 2200KM's per month but pressure test at honda dealer reveals nothing. Total KM's 78000 with regular servicing at honda and also get CEL (VTM-4) and random misfire codes usually at cold startup. thought maybe head gasket but honda reckon they are fine. Maybe they are unrelated and from what I read I need valve adjustments ? Also read coolant could be breaching at EGR manifold gasket ?
I only have a basic ODBII scanner.
Any suggestions much appreciated !

 

do you see a coolant leak? is it blowing smoke? and you might need the valve adjusment and sometimes on the mdx when the CEL comes on the vtm-4 light comes on also but when you shut the car off it goes away, is that the case? and also what are the codes you are getting?

 

no visible signs of coolant anywhere and pressure test doesn't show a problem either. Doesn't blow smoke but throws misfires (P0301-6) intermittently usually on startup . The VTM-4 light does appear but is reset if I stop and start the car again.

Thanks