Misfire

SOULSBORNE2010

MEMBER
2012 VOLVO S60
2.5L
5 CYL
2WD
AUTOMATIC
80,000 MILES

The issue occurred on the highway. No previous issues concurrent to errors below have ever occurred.
Cylinder 2 and 4 report misfire. Replaced all 5 ignition coils. Replaced all 5 spark plugs (Iridium Bosch). Replaced fuel Injector for Cylinder 2 and 4. I can remove injector cap on cylinder 1, 3, 5 and motor will shake vigorously. Remove the injector cap from cylinder 2 or 4 or both at the same time and engine misfire remains consistent (same vibration - exhaust tone)

Took the car to Import repair center. Best advice given: "replace motor"

My question is two-fold: How do I diagnose a possible electrical issue between the computer and wires leading to the fuel injectors? Would re-flashing the ecu help?

For an engine that still runs, with semi-low mileage and consistent service pattern, does the advice given from the repair center seem logical?

Thanks for any assistance you can provide. Any thoughts or suggestions are more than welcome.

Dan

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,490 POSTS

Welcome to 2CarPros.

Dan, that doesn't sound like good advice. If it has been maintained, 80K is nothing to this vehicle.

Now, what we need to so is see if you are getting spark to cylinders 2 and 4. Here is a link that explains how:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

If you find there is spark, we need to check the actual injectors.

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

Here are a few links you may find helpful when testing:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

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If you could check those two things, it would help.

Let me know the results. Also, you said this happened all at once, correct? No prior problems?

Let me know,
Joe