Started w/ PO306 & 316 - changed 6 plug. Then PO 303 & 316. Replaced all plugs, wires, & air filter. Now 303 & 316 are back. Engine misses, understand 316 indicates start up problem.

Lights would stay off for a day or two between work, but misfire really never seemed to go away. Detection of misfire at start-up now seems to be worse than it has been.

Changing fuel filter and adding Techron this afternoon.

Any further advice would be greatly appreciated!

 

Ford had a problem with some bad heads on the 3.0L OHV several years ago. Exact same symptoms as you describe:

Ford Truck Enthusiasts Forums - View Single Post - 2005 Ranger 3.0L head replacement

In any case, if it's a 2014 then it's certainly still under warranty. Bring it back to the dealer and tell them to fix it.

 

Welcome to FTE.

I see its an 06 Ranger with between 50-75K miles on it, so its within the troubled time frame & mileage for problems like that to arise, so do a cyl balance & compression test as outlined in the link Rockledge posted & let us know what you find.

Is this a flex fuel 3.0L????? If so, are you using E-85????

Since our "waste spark" ignition system puts a double work load on its components & thus is kinda persnickety about its plugs & wires design, what brand plugs & wires did you use????

 

Thanks for filling in the blanks paw paw. I thought I would have a little fun with the OP with regard his/her post title.

 

Yah, I kinda thought it must be an out of country Ranger if its a 2014, or a typo on the year, but found it was an 06 on his personal info page, so it fit right in with the info your link.

With the P0316 random misfire on the first 1000 start up revs & it being a 3.0L, the cam sensor & sync assy probably belong on his suspect list too, especially if its making a noise, or has lots of miles on it.

If he just bought it used from a Dealer, take that puppy back & let them deal with it under what ever warranty that might be in place.

 

Good point. The 3.0L is somewhat prone to cam sensor/synchronizer problems.

https://www.ford-trucks.com/forums/2...placement.html

 

I was gonna ask for pictures.... 2013 is barely 1/2 over...

tom

 

^ + 1, I like tomw's test ideas!!!!

 

Ooops, I wish it was a 14, it's 2004! 'nough said still need advice. Son said it was missing at about 60mph this morning but no check engine back on!

 

oops 2004 not 2014; son said it started kicking out on him about 60 mph this morning, but no light.