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1998 Jeep Cherokee Rough When Cold, Thud Noise...

1968 Charger B5

NAXJA Forum User
Location
Orleans, Ma
Completly stock except for magnaflow cat, and muffler. 108,00 miles, recent tune-up and always change oil every 3k miles.
I never noticed this before but the past few months my jeep has had a problem when its warming up.
In the morning, or even after sitting for a while, until it is warm it runs sort of rough. Also with a small amount of gas, it makes a like thud noise, and almost dies.
I cleaned the throttle body. I am unsure what to do next? I thought it was the exhaust cause the cat was plugged, but I just changed hte entire exhuast any ideas ?
It is throwing no codes. I figure maybe a vacuum leak? But I don't see one present. Maybe IAC sensor? Possibly fuel filter, but it would do it all the time not when its cold....any suggestions would be great thanks guys.

Rick
 
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