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KMeier123

Seeking Advice on 2005 Volvo C70 Diesel: Symptoms Include Black Smoke, Unsteady Engine, Stalling and Whistling Noise

Hey gearheads, I need your expertise here. I'm having problems with my 2005 Volvo C70 Diesel that's clocked about 102,390 KM. Symptoms I've noticed include black smoke while accelerating, and the check engine light's on. It's losing power, the engine's unsteady, and there's jerking and a loud hiss on acceleration. It stalls while idling, shakes too, and there's this whistling noise. My guess is the boost pressure actuator is acting up. Has anyone faced a similar mishap? How was your experience at the mechanic? I had a bummer of a time with mine last round. Any advice or heads-up would be awesome!

(Translated from German)

Summary of the thread

A 2005 Volvo C70 Diesel is experiencing issues such as black smoke during acceleration, an unsteady engine, stalling, and a whistling noise. These symptoms suggest a potential problem with the boost pressure actuator, possibly due to a damaged wiring harness. A similar issue was resolved by repairing the wiring harness and recalibrating the actuator, which eliminated the symptoms. It's advised to consult a knowledgeable mechanic familiar with Volvo diesels to address the problem effectively.

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4 comment(s)

LukasSchneidi

Hey, I feel you, had a kinda similar issue with my Volvo V70 2008 Diesel a while back. It was having power issues, a shaky engine, and throwing off black smoke left, right, and center. My garage buddies nailed it down to a damaged wiring harness to my boost pressure actuator. Spot on guess, right? No beating round the bush here, it was kinda a significant issue - but remember, nothing's as bad as it seems. The important thing is to catch it early, like you have. It ended up requiring a fixed-up wiring harness and a recalibration of the pressure actuator to sort the problem. The engine dynamics, smoky clouds, and funny noises disappeared post-fix, and the beauty was back to her smooth, purring self, minus the shakes and stalls. It looks alarming at first and feels like a real headache, I totally get it. But don't worry too much, it's a solvable blip. Your Volvo hasn't lost her Swedish spirit yet! Quick heads-up though - make sure your mechanic knows his stuff around Volvo diesels. Saves you the usual runaround. Cheers!

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KMeier123 (community.author)

Hey there, Wow, seems like you hit the nail right on the head with the diagnosis! Hate to think about the repair costs though. Do you recall roughly how much you ended up shelling out to sort this out? Also, any additional unexpected issues pop up since then? Appreciate the reassurance and the advice, I'll make sure I hunt for a mechanic who knows their way around a Volvo Diesel engine. Cheers!

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LukasSchneidi

Hey, Let me tell you, it wasn't as bad as I was bracing myself for. For the repair job on the wiring harness to the boost pressure actuator, it cost me around 155€. Fairly decent, don't you think? In terms of unexpected stuff, I'm happy to report smooth sailing since the fix. I actually visited the mechanic ever since to ensure that the boost pressure actuator malfunction was entirely sorted out, and trust me, it has not reared its ugly head again. My lady has been running smooth and fine, just like old days. So, chin up! It seems daunting, but hang in there. Wit' a bit of patience and a good mechanic, you'll see through this. Keep on truckin'!

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KMeier123 (community.author)

Hey, Cheers for the swift and encouraging response! €155 seems like a fair deal to get my Swedish beauty back on track, especially considering the nightmares I've been imagining. Glad to know yours is back to her fine former self and there are no unwelcome surprises, fingers crossed mine follows suit. Off to start my hunt for a top-notched Volvo Diesel-savvy mechanic then. Will keep you posted on the progress. Ride on!

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VOLVO

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C70