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Ask Peter Bagley Your Own Question
Peter Bagley
Peter Bagley, Toyota mastertech
Category: Mitsubishi
Satisfied Customers: 726
Experience:  master tech at Toyota dealer
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Ignition coil... 99 mit 3000GT SOHC w/ distributer....

Customer Question

ignition coil... 99 mit 3000GT SOHC w/ distributer.... primary coil end of coil has pos/neg foe connecter....connecter wires frayed were shorted out/ pos touching neg.... is this what caused coil to fail? tested bad at primary..resistance 00.1 ohm shoulda been 7-9.0 ohm... secondary coil side tested ok on resistance
JA: Have you checked all the fuses? Do you have a wiring diagram?
Customer: yes and yes no bad fuses coil bad after I had plenum off, cleaned injectors, replaced plugs wires....older \car,,, didn't realize that connecter for coil primary was shorted.
JA: Are you fixing your 3000GT yourself? What have you tried so far?
Customer: yes I do everything myself
JA: Anything else you want the mechanic to know before I connect you?
Customer: just want to know if this is what caused coil to go bad...irs original coil... high miles but has new engine.
Submitted: 10 months ago.
Category: Mitsubishi
Customer: replied 10 months ago.
correction : resistance at primary coil should be.7 to .88 ohm
Customer: replied 10 months ago.
tested resistance at primary coil was 00.1 ohm specs .72 to .88
Customer: replied 10 months ago.
001 ohm at test
Expert:  Peter Bagley replied 10 months ago.

Hello and welcome to just answer and allowing me to assist you. , usually the common causes of a coil going bad are too wide gap or faulty spark plugs and or high tension wires if equipped. and age , heat fatigued. also voltage surges caused by what you just described.Hope that answers your question and if you require further assistance I'll be happy to do so.

Customer: replied 10 months ago.
thye voltage surge related to the pos/neg wires touching at primary coil connecter correct?