melinaflamme84

Sonic Diesel Lean Running Issue

Alright, Chevy Sonic gurus, I'm pulling my hair out here. My 2017 Sonic with the diesel engine is giving me fits. Got 202118 km on the clock. The engine's running way too lean – feels like it's starving for fuel. I've got reduced engine power, the check engine light is mocking me, the engine runs rough as a badger, and it's jerking like crazy when I try to accelerate. My gut tells me it's the injection valve or maybe the injectors themselves. Anyone else seen this gremlin? Could it be the EGR valve playing up, messing with the air-fuel ratio? Or maybe a dodgy oxygen sensor throwing everything off? I've even considered the catalytic converter and intake manifold, but those seem less likely. Thoughts?

A 2017 Chevy Sonic with a diesel engine is experiencing lean running issues, characterized by reduced engine power, a check engine light, rough idling, and jerking during acceleration. Possible causes include faulty injection valves, injectors, the EGR valve, or a malfunctioning oxygen sensor. After considering these possibilities, it was confirmed at a shop that injector number 3 was faulty, leading to the resolution of the problem.

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4 comment(s)

Woah, sounds rough! Lean running is a pain. Have you checked for any obvious air leaks in the intake? A big leak after the MAF sensor can cause the engine to think it's getting less air than it actually is, which would lean out the mixture. Just a super simple thing to check before diving into injectors and stuff.

Good call on the air leaks – I'll definitely give the intake a once-over. But if it is an injector, is there any way to confirm which one is the culprit without pulling them all and sending them off for testing? I'm trying to avoid that expense if possible.

Yeah, pinpointing a single injector without proper diagnostics is tough. Honestly, with all those symptoms, and the diesel engine's higher pressures, you're probably best off getting it hooked up to a proper diagnostic tool at a shop. They can monitor the injector timings and fuel trims to see if one's acting wonky. Could save you money and time in the long run!

Fair enough, figured as much. Bit the bullet and took it to a shop. Turns out, injector number 3 was indeed toast! All in, it cost 515€, so thanks for confirming my suspicions and saving me the hassle of guessing. Appreciate the help!

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CHEVROLET

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SONIC