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Ask Toyota Service Your Own Question
Toyota Service
Toyota Service, Toyota Expert
Category: Toyota
Satisfied Customers: 4909
Experience:  30+ Yrs of auto experience, Award Winning Svc. Manager; Just Answer Customer's Choice Award Winner
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My 2003 echo has no spark on three cylinders : echo 4dr : it

Customer Question

my 2003 echo has no spark on three cylinders
JA: What is the model of your '03 Toyota?
Customer: echo 4dr
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: it originally was misfiring on one cylinder. i replaced plugs, coil/boot and fuel injector on cylider 4
JA: How many miles are on the car? Is it a steady misfire? Or random?
Customer: 225K. it was a steady misfire. diagnostics said cyl 4 misfire
JA: Anything else you think the mechanic should know?
Customer: i pulled boot coil and plug to check for spark, only one had any
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 Toyota Mechanic about your situation and then connect you two.
Submitted: 1 year ago.
Category: Toyota
Expert:  Toyota Service replied 1 year ago.

Hello. Welcome to Just Answer. Please allow me to assist you. This car's coil system shares a common ground across the coils. If one coil is bad, it can cause the next coil to fail, and cause a misfire, even though the faulty coil does not exhibit a misfire. The recommendation I have for you on this request would be to replace all of the coils on thsi car with genuine Toyota replacement parts. Non-Toyota coils can cause the problem to reoccur, as they do not have the adequate ground isolation (which is most likely causing the problem in the first place).

Expert:  Toyota Service replied 1 year ago.

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