Could.......

Could an incorrectly wired coil on RRC 3.9 v8 cause it to stop running and not restart, then when not in use drain the battery?

My mechanic whilst trying to get it to run last week wasnt sure about the wiring for the coil when he fitted a used one, it then ran for a while but would not restart.

I spent two days charging the battery after all the cranking we had done to make sure it was ready for attemp two today, with a different mechanic. Then only to find the battery almost dead?? when it was charging it pulled 5 amps to start with but over 24 hrs went down to one-ish like it should.

I didnt think the coil was in contact with the battery with the ignition off?

I guess nobody knows???

They have said the mobile mechanic had wired bith sides of the coil to positve!!!

I dont know how it even ran with that???

fett said:

Could an incorrectly wired coil on RRC 3.9 v8 cause it to stop running and not restart, then when not in use drain the battery?

My mechanic whilst trying to get it to run last week wasnt sure about the wiring for the coil when he fitted a used one, it then ran for a while but would not restart.

I spent two days charging the battery after all the cranking we had done to make sure it was ready for attemp two today, with a different mechanic. Then only to find the battery almost dead?? when it was charging it pulled 5 amps to start with but over 24 hrs went down to one-ish like it should.

I didnt think the coil was in contact with the battery with the ignition off?

Click to expand...

If the coil wasn't hooked up correctly I believe it would stop it running as your ECU wouldn't get the trigger signal and I suspect the coil wouldn't fire because the amplifier wires wouldn't be correct.

How do you wire a coil the wrong way around? The terminals are marked + and - and if you've got the right spade connectors it is difficult to see how it could get fouled up. Didn't you do a search of the forum, I'm pretty sure I've posted on this before.

Yes, your coil has no direct connection to the battery with the ignition off because the feed is ignition switched.

If you look at the wiring diagram, the ignition feed is a white wire - goes to coil + There is also a capacitor attached to coil + and the feed for the ignition amplifier comes off the ignition feed.

On the coil negative side is the feed to the ECU and connection to the other side of the ignition amplifier. These will be wite with black stripe wires. So there you go, quite simple really.

Hope that gets you going.

It was the mechanic who did not charge me that wired it wrong as he went in to the job a little less planned than I would and took all the bits off without noting where they went. It doesnt matter now anyway as the garage has it to sort out but I wondered if that would explain it all (bearing in mind this was after it failed to restart but we had-had it running)

Could it have killed the ECU?

The Garage told me yesterday that this was there current suspect as its not sending out its signals to the TPS etc.

i told you all ready fett woss rong.

Fix the cam sensor and sell it.....tw@t

We agreed there was no cam sensor on a 3.9 with hotwire you west country monkey!