Engine would not shut down!
 

Yesterday I finished installing a new one wire alternator in place of the Motorola four wire. The guy at the rebuilders looked up the wiring on the original and said to put the orange lead and the purple wire together on the alternator. I did. As soon as I turned the battery on the gauges came to life even though the ignition was off.(??)
I fired up the engine and all seemed OK, till I went to turn it off. Switched the key off, removed it, and it was still running. I went to turn the battery switch off, but it broke in my hands. NOT GOOD! :eek: :eek: I grabbed a rag and yanked the coil wire out. I disconnected the battery leads to keep from discharging them.

I believe the aternator is wired wrong.
What did I do wrong????

Re: Engine would not shut down!
 

The purple wire is used as an exciter for the old alt it also is the ign hot lead /the orange goes directly to the batt(though the starter hot)

solution- disconnect the purple lead tape off end and forget it exists

the only wire that should be going to the alt is the orange

ie single wire

Re: Engine would not shut down!
 

Thanks, I'll do that.

Question, will the volt meter on the instrument panel still function nomally?

Re: Engine would not shut down!
 

Yes

Re: Engine would not shut down!
 

Yes, however it will most likely read lower than it used to. One wire alternators sense the voltage at the engine whereas the Motorola sense the voltage coming from the dash and compensate for the voltage loss from the engine to the dash and back.

Re: Engine would not shut down!
 

Thanks Wobble, I'll watch for it.
But since the old alternator hasn't worked right for a couple seasons any reading over 10V looks good.

Re: Engine would not shut down!
 

Leave it alone!!! It's hard enough to keep these things running and yours wont shut off...LUCKY MAN! :evilb:

Re: Engine would not shut down!
 

Lol!

Re: Engine would not shut down!
 

LMAO!! :p

Re: Engine would not shut down!
 

Turn off the gas to the engine and see if it stays running.

If it does than I would like to buy one of those magic alternators.

Re: Engine would not shut down!
 

LOL!!!! :drink:


LOL! That's along the same line as a perpetual motion machine. :D



This hasn't been my week, and it's only Tuesday.
If it isn't the boat needing work it's my truck. I've been having trouble keeping all 8 cylinders firing in my F-250. Last night I drove it home on 5-6 cylinders. This morning it was just as bad. Two weeks ago it did the same thing and I paid 580.00 to get it fixed. All they said it needed was plugs, fuel filter, and an injector flush. It was fine till now. I found a new set of 8 ignition coils on E-Bay for 119.00 w/shipping. Normally they run 65.00-80.00 each. If I can get them fast I'll swap them out on the weekend.

Re: Engine would not shut down!
 

Let me guess...it was fine til it warmed up?Yeah,it's the coils...just did mine and it's very common on the 5.4 triton(assuming that's what you have).

Re: Engine would not shut down!
 

Yep, seems fine till it's hot. Actually, it's usually better in the morning than in the evening.
Except for today. It was misfiring from the start. Had trouble getting it up to at least 60 mph on the FL. Turnpike.
And I do have the 5.4, with 134,000 miles.

Re: Engine would not shut down!
 

Yep,that's what it is...wish I caught you before you spent the other wasted $$$$$$.

Re: Engine would not shut down!
 

Well, I had a feeling the coils were shot, but it also had the original plugs still in the engine. I took one look at how hard the plugs were to get at and decided to let someone else have at it. I just didn't think the labor would be so high. 226.00 in labor for the plugs alone.