I have changed the plugs, wires and coil and the van still runs horrible. when you are accelerating it runs very slugish and has a miss to it. once you get up to speed it runs pretty good at constant speed but if you accelerate, it will start missing again.
Ford Q&AAsk Your Question
2005 Ford Freestar Question: error code= misfire #1 cylinder. plugs, wires and coil changed. No Change
Answer #1mastertech6371 January 05, 2012, 19:32Master
the first thing you always check is the compression. without that, all the parts you threw at it mean nothing.
from there you move forward with vacuum leak checks, injector, plugs, wires etc.
Replyice299, January 06, 2012, 08:51Rookie
when i changed the coil, plugs and wires, the code for Cylinder 1 misfire was reset and has not came back but the van still runs rough. the check engine light has not come on since those items have been replaced but its like its bogging down, if that makes sense. it will accelerate through it and runs pretty good at 55-60 mph but if you step on it, you'll feel it. its worse when your at low speed, especially when your starting out from a stop.
patrick mannion from Greg Solow's Engine Room, January 05, 2012, 20:32Master
Roy is right start with the basics. Three things can cause a cylinder to misfire, mechanical issues (low compression), fuel (a bad injector or lean mixture in that cylinder due to a vacuum leak)or loss of spark. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online