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May 3, 2023 at 11:58 pm
#1024898
I changed the EGR valve, the hissing was coming from a missing hose that connects from the EGR valve to the EGR control-BPT valve. I did put a temporarily nut and it idle fine – for a short period of time. Now it is rough idling again, I order the missing hose that connect the EGR valve to the EGR control, should be coming in next week. Some of my friend suspect it is the spark plugs or distributor cap – however no check engine light is active.