IPR and ICP
I know this has been discussed many times before but I am a little confused. So I apologize in advance. i have a 2003 Ford F350 with a 6.0 L engine. When hot the engine seems to lope a little while idling. It seems at low rpm's that if it was a gasoline engine I would say is running a little on the lean side with some bucking and hesitation. At idle the ICP runs about 644 on a scan gauge. Also at idle on my scan gauge IPR runs about 24.2 or so. However about 50% of the time the IPR will start out at 24.2 then start rising in a couple seconds to about 28 or 29. At the same time the ICP starts to rise to about 850. When this happens that is when the rough idling begins. When the IPR stays around 24.2 the engine idles normally.
I would unplug the pressure sensor but with the 2003 it's almost unreachable while running.
My question is do you think it is the pressure sensor that is giving a false reading and I need to change it out?
Thanks in advance,