1999 Jeep Grand Cherokee Limited 6 Cyl 4.0L
my jeep backfires when cold.
when i dont run the car for an hour or two,the car backfires until it warms up. it happens all the time now after it has been off for more than an hour.
Nissan Technical Advisor 3/24/2011
Check the condition of spark plugs and replace if worn. Also have a cylinder compression and diagnose the engine for trouble codes.