Originally posted by Tote
Took the ute for a run this afternoon and the tacho seems only to be erratic below about 1500RPM. I can live with it but it would be interesting to know why it happens. Maybe crossfire from one of the plug leads??? Checked the connections again and the tacho is connected to the negative side of the coil and the other connections are OK. Plug leads are all new silicone ones.
The coil is the one that is suggested in the Bosch book so it should be OK. The spark is heaps stronger than it was previously so it may be that I have been running the wrong coil previously anyway.
Thanks for the replies
I am guessing your running the MEC 717? or the MEC 716? I agree you get a stronger spark on the clevo. Which is all good. I've been speaking to various people about these coils being mounted on to the head of the cleveland (factory mounting).
The longest ones lasted is 2 1/2 years :(
I had a MEC 717 fail after 17 months. I posted on Ford Forums about it.
I shot down the wreckers and picked up another MEC 717 off an XF (yes XF run the same coil). Also picked up an old oil filled coil for safe measure. $22 for both coils and no I won't get stranded again.
I didn't want to invest the $60 to have a coil fail again in 17 months.
In regards to the tacho issues? I am guessing your using the factory dash tacho? I run a speco aftermarket tacho and ignition US Motorcraft dizzy setup.
Check it tonight in the dark and look for misfires? Maybe even the dizzy cap is work out and misfiring?
Sounds really odd.