Why am I not getting very much pressure in my radiator

If there is a smell, be on the look out for a leak of some sort. It would be best to have the cooling system pressure tested to see if there are any signs of external leakage. Further, a diagnostic tool can be utilized to see what coolant temperature information is being sent to the engine's processor, to see if it is functioning properly, and to get a sense of operating temperature and fluctuations overall.