A little help please. 2005 for 150 . Had a skip when I parked it about 2 months ago , but it would run and idle. The skip is from a coil. Replaced the bad coil today and tried starting it. Started very hard and runs terrible. Once the temp started to move it won't even idle. Any ideas?

 

Which engine? How many miles on the spark plugs?

 

5.4 v8. About 60000 on spark plugs about 170000 on truck

 

It may be time for new plugs again, along with coil boots. Also, the 05 5.4 had a bad batch of fuel injectors that leak. If it's been missing and/or getting excessive fuel, your cats may be clogged, the backpressure will make it run terrible.

 

I'd go with new plugs, wires and clean the maf sensor.

 

What wires? It has coil on plug......

 

Ha, that's what I meant to say. My bad