has anyone ever come across this problem. sometimes when i start my 05' feh, when it finally drops to ev mode it won't stay it goes right back into ice mode. it will do this the whole time the truck is running. and won't stay in ev at all goes right back to ice.

but if i shut the truck down and restart it it works fine. it will drop right down to ev mode, and act normal. i can get a 1/2 mile to a mile in ev mode i think the problem is in the battery pack but not sure. any ideas.!

 

I wonder if you have failing relays and replacing the ones in the "stop safely now" threads would fix it?

 

i have had the red light come on once or twice before. it's a good thought, i am going to connect my obd II computer tomorow and see if it,s throwing any codes. i will post the outcome tomorow.

 

In my experience with submarine batteries (different chemistry) when a cell goes bad it doesn't play games, it goes. In any event unless a whole group of cells was going bad just one cell wouldn't do what you report.

So the erratic behavior you report strikes me (at some risk of being accused of blaming all odd behavior on this) as a wiring/connector problem.

For example an odd behavior on conventional cars I have observed: when a starter starts the engine just fine cold but won't when the engine is hot and its summertime, there is an oil soaked connection, probably the heavy positive cable where it connects to the starter.

In this case I believe a possible mechanism is that a fault in the signal line that switches the ICE between EV and ICE heats up slowly and then when it gets warm enough and you cycle on & off, your FEH works fine.

 

happens to me too on an 06. Brought it in to ford and they found nothing. They say to bring it in when it's having the problem. Then they need me to leave it there and guess what, when they restart the truck, nothing's wrong...

 

By any chance are you driving in "L" most of the time? I've never seen this myself but driving in "L" could cause this problem without codes.

GaryG

 

That's sounds possible, running in L the first time, than shift into park, restart and now in D.

 

Now, what do you know about anything here? Who said anything about the first time in "L"? You are a trouble maker with no understanding about anything that I can tell. Your comment of shifting to park, restart and now in D is your smart comment of trying to be an insult to me. Please grow-up till you know what you're talking about.

GaryG

 

thanks gary good thought . but the truck seems to only do it at certain times. i drive in d all the time, except in the winter, when i am coming down either of the bridges to cape cod, when its snowing. but if it's acting up, and i pull over shut it down and restart it. it's fine. this really baffles me.

i have only 5,000 miles left on the 100,000 mile warranty. i should leave the truck with the ford garage for a day. i even get a rental for the day from ford.

i have hit 38.5 mpg when the truck acts right. so i know i 'm driving it right.

your right the other guy, didn't know what he's talking about. sounded like gibberish to me.

i trust your opinion you seem to know what your talking about.

what do you think of the dash daq. i was thinking of getting one.

 

by the way it didn't throw any codes it was clear.