The past month or two we've been getting an intermittent Cylinder Misfire in my 2011 Expedition with the 5.4 L engine. No CEL comes on and mostly does so at idle. The truck has about 120,000 on the clock.
Last year we had the fuel pump and replaced and spark plugs replaced
Took it in to the shop and they couldn't get anything to come up and there aren't any codes being thrown so we took it back.
My wife said it happened again yesterday when she was low on fuel. Filled up, drove it for a bit and she said it happened a couple more times. I drove it last night and today and haven't seen it come up again. I have been in the truck when it misfires so I know she's not imagining things. Our fuel economy is also down about 1 MPG on average.
I'm thinking the coil packs could be a culprit. I'd like to just forget about it but I have a feeling it'll come back, especially when the tank is low.
Anybody have any thoughts on what to do or what to check?
Last year we had the fuel pump and replaced and spark plugs replaced
Took it in to the shop and they couldn't get anything to come up and there aren't any codes being thrown so we took it back.
My wife said it happened again yesterday when she was low on fuel. Filled up, drove it for a bit and she said it happened a couple more times. I drove it last night and today and haven't seen it come up again. I have been in the truck when it misfires so I know she's not imagining things. Our fuel economy is also down about 1 MPG on average.
I'm thinking the coil packs could be a culprit. I'd like to just forget about it but I have a feeling it'll come back, especially when the tank is low.
Anybody have any thoughts on what to do or what to check?