Could My MAP sensor readings be the reason for my rough idle especially for first start of day when the engine is cold. My MAP reading is 28-29KPA at idle (675RPM). When I increase RPM to 2000 , MAP goes to 30-31.
When I let go the accelerator MAP goes to around 27 then settles at 29 again.
Should there not be a bigger increase in pressure when RPM was increased and is 27-29 not too high for idle?