How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Juan Crespo Your Own Question
Juan Crespo
Juan Crespo, Tech Trainer
Category: Mitsubishi
Satisfied Customers: 1501
Experience:  A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
Type Your Mitsubishi Question Here...
Juan Crespo is online now
A new question is answered every 9 seconds

I have no spark on coil 1 and 4 : 2002 Mitsubishi montero

Customer Question

I have no spark on coil 1 and 4
JA: What is the model/year of your Mitsubishi?
Customer: 2002 Mitsubishi montero sport 3.0l
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: cam sensor Crank sensor ignition coil 1 and 4 3 and 6
JA: Which sensor are you asking about? O2? MAP? Did any codes pop up?
Customer: 02 have no code map no code
JA: Anything else you think the mechanic should know?
Customer: i dont have no ground from the ecu when the engine was crank over
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Mitsubishi Mechanic about your situation and then connect you two.
Submitted: 4 months ago.
Category: Mitsubishi
Expert:  Juan Crespo replied 4 months ago.

Hi there.

I see that you've posted there is no ground from the ECU when the engine is cranking. That usually happens when the circuit is open or the driver inside the ECU is burnt. Check driver/ground circuit resistance from the coil to the power transistor and from there to the ECU. If circuit resistance is less than 5 Ohms, then the problem is a burnt driver inside the ECU.

To prevent the new ECU from getting damaged, make sure to replace the ignition coil.

Related Mitsubishi Questions