Simple. Compression/leakdown to make sure ok. If ok injectors. If bad may need tear down.

 

Is it likely that 2 injectors could go bad at once? I feel like that if that happened it might be due to another underlying cause. But what? I can totally see one injector part failing, but two at the same time feels weird.

 

Sorry about your troubles. Let's hope they'll resolve the problem swiftly and permanently soon.

But with SAE standards dictating that specific codes be given for misfiring, how is it that the OBD II reader can't easily pick it up? Or has Volvo made the error too proprietary that the error code read buffles their service departments also?

Without hijacking your thread, if ever there was no reason given before, this is now justification for Volvo to consider providing 5 and 6 cylinder engines as an option before they completely ban ICE in preference for an all electric vehicle to avoid complete limp mode when other cylinders could have slowed it down gradually as opposed to abruptly, risking accidents along the way.

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They seemed a little baffled too. They were pretty confident in the code, but then it changed or wouldn't come back. Looked in the cylinders with camera and didn't see anything obvious. Would they?

 

My guess is the head bolts between 2 and 3 weren't torqued properly from the factory leading to coolant intrusion and no spark. Doing an engine I'm a car for this exact reason. Those new plugs will last about 3k miles and you'll be right back where you are.

Or you could have an injector stuck open but I doubt two would be stuck open.

Could also have oil consumption from bad rings but again I don't usually see that across two cylinders.

My bet is you end up with a new engine.

Then you should promptly sell that ****ter and never buy another drive-e garbage can again.

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My guess is the head bolts between 2 and 3 weren't torqued properly from the factory leading to coolant intrusion and no spark. Doing an engine I'm a car for this exact reason. Those new plugs will last about 3k miles and you'll be right back where you are.

Or you could have an injector stuck open but I doubt two would be stuck open.

Could also have oil consumption from bad rings but again I don't usually see that across two cylinders.

My bet is you end up with a new engine.

Then you should promptly sell that ****ter and never buy another drive-e garbage can again.

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Thanks @inteller, that's good info. How do we verify if that's the issue (bolts not torqued)?

BTW - what's a "drive-e"

 

You are gonna take off the head and see a stain mark where the headgasket should have been that shows where fluids were mixing across the mating surface.


Drive-e is the motor in your car.

 

ahhh ha....I knew that Thx~ It does seem like alot to ask for a 4 banger to pull off. ie - Haul 5K lbs around with low displacement, and two kinds of supplemental boost.

 

Before they pull off the head they are going to do an exhaust gas test in the coolant.

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They installed new plugs, new injectors and did a compression test. All check out, compression is good.
Still getting a misfire.
Said they can't do a leak down test on that car.....then kinda described my understanding of a leak down test as the test they performed. In any case - all numbers were where they are supposed to be.
Would a compression test reveal the problem of a mis torqued or warped head?
They are in touch with Volvo Corp tech to figure out what to do next.
Should i be making suggestions on what/how to fix per your advice above? or let them go through their process for however much longer? I'm growing concerned that they are not leading in the direction you all mentioned above. your advice on managing the dealer relationship is always appreciated. So far they've been very responsive, friendly, concerned and generally on top of the whole thing even as busy as they seem to be.

 

They should have also looked at Ignition coils by putting new ones just to check if misfire disappears. They can always remove those coils and put old ones back of misfire happens even with new coils.

I'd also look at throttle body, oxygen sensors, CATS, etc, as all these affect idling

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Hey all - a little update and concern here.
Dealer replaced plugs, injectors still had misfire code.
Checked oil level, found it had 1.5qts too much in it. Oil was seeping through to intake side of turbo, and into combustion chambers.
They cleaned turbo and took out some oil, no codes and supposedly ready to go.
My question: Really?
This seems super odd. We had it serviced at same dealer 3k ago who performed the oil change. Wouldn't we have seen the problem sooner than 3k miles?
Could this overfill for an extended time have caused other internal damage that would not be evident until later in the car's life?
I'm not inclined to put my family in another dangerous highway situation. If this thing is going to have future issues I'd like to know now.

 

Hey all - a little update and concern here.
Dealer replaced plugs, injectors still had misfire code.
Checked oil level, found it had 1.5qts too much in it. Oil was seeping through to intake side of turbo, and into combustion chambers.
They cleaned turbo and took out some oil, no codes and supposedly ready to go.
My question: Really?
This seems super odd. We had it serviced at same dealer 3k ago who performed the oil change. Wouldn't we have seen the problem sooner than 3k miles?
Could this overfill for an extended time have caused other internal damage that would not be evident until later in the car's life?
I'm not inclined to put my family in another dangerous highway situation. If this thing is going to have future issues I'd like to know now.

Are they admitting they screwed up? How does a Volvo DEALER put in that much extra oil??? Seems fishy.

 

@DavidEid They did not admit it, but since under warranty still, they did all the work for no charge. The whole thing is too weird. They were calling the factory techs and everyone was baffled. They said the overfill would have presented a problem right away, but we drove over 1000 miles before the issue. Runs ok now, though the check engine light just came on. not sure if it's related. Funny story...through the whole process, they didn't do an oil change, and we had to go back a couple of weeks later to get that service. Ha.