C30 Engine : - 2.0L Petrol - struggling/loss of power - Page 5

Isaackoh · Apr 7th, 2016, 16:52

Hey Guys,

It seems I have similar problems as what most of you describe. And I am still clueless together with my Mechanic. This is what we have tried:
1. Initially there was a fuel pump issue. We changed it and all readings on the Ecu says normal. We tested the fuel pressure using a gauge that it plug inbetween the fuel line before entering the engine. It all read consistent pressure. So fuel injection got ruled out. Problem still persist.
2. One of those days I accidentally pumped octane 98 and the sluggish and jerk at 2000 rpms across all gear range got worst. So bad that when we switch to manual model, it only went onto the even gears. So we burned up all the petrol and pump the shell v power and things got smoother. But the same crap persisted.
3. Checked the Sparks. They look New. The coils are old but seem fine.
4. We changed the transmission fluid from one that is for manual gear box to DCT gear box. And the problem still persist.
5. So the only thing that we Guess would be the gear box itself.
6. I also suspect that the ECU has been reflash by the previous owner, because I drove the c30 2.0i when the owner first bought and it was like crap. But after I took over the car it seems punchy and torquey. So I am considering to do a rest all to factory setting for the ECU.

Any thoughts guys?

GusGecko · Apr 7th, 2016, 16:58

All of my issues have been resolved...

One of my throttle issues was due to faulty electrics inside the throttle body. Consider reviewing this.

The other issue I had which I apologise now..i can't remember EXACTLY what it's called as I'm no mechanic but hopefully someone can chime in and correct me... it was some kind of solenoid vacuum pump...that relates to the throttle, .that had an air leak of some kind and wasn't pressuring properly.

I believe both these issues were found when plugged in by at volvo garage.

I know it's a bit vague, but I equally know how bloody annoying it was when it wasn't working!!!

DanielLee · Apr 11th, 2016, 03:08

It was the solenoid valve. It's an electronic part located next to the ECM.

Manny · Apr 23rd, 2016, 00:57

Is this a common issue/part across all newer Volvo's as i have a 2006 V50 2.0 petrol which is suffering from the same misfire/stuttering issue when it gets hot and starts playing up intermittently about 30 minutes after i have been driving it ? i should note that i also have no warning lights on my dashboard either.

Apr 7th, 2016, 16:52	#41
Isaackoh New Member Last Online: Apr 8th, 2016 16:30 Join Date: Apr 2016 Location: Singapore	Jerks at 2000 rpm at every gear Hey Guys, It seems I have similar problems as what most of you describe. And I am still clueless together with my Mechanic. This is what we have tried: 1. Initially there was a fuel pump issue. We changed it and all readings on the Ecu says normal. We tested the fuel pressure using a gauge that it plug inbetween the fuel line before entering the engine. It all read consistent pressure. So fuel injection got ruled out. Problem still persist. 2. One of those days I accidentally pumped octane 98 and the sluggish and jerk at 2000 rpms across all gear range got worst. So bad that when we switch to manual model, it only went onto the even gears. So we burned up all the petrol and pump the shell v power and things got smoother. But the same crap persisted. 3. Checked the Sparks. They look New. The coils are old but seem fine. 4. We changed the transmission fluid from one that is for manual gear box to DCT gear box. And the problem still persist. 5. So the only thing that we Guess would be the gear box itself. 6. I also suspect that the ECU has been reflash by the previous owner, because I drove the c30 2.0i when the owner first bought and it was like crap. But after I took over the car it seems punchy and torquey. So I am considering to do a rest all to factory setting for the ECU. Any thoughts guys?

Apr 7th, 2016, 16:58	#42
GusGecko from C30 to XC60 Last Online: Aug 28th, 2023 07:55 Join Date: Jul 2012 Location: Braintree, Essex	All of my issues have been resolved... One of my throttle issues was due to faulty electrics inside the throttle body. Consider reviewing this. The other issue I had which I apologise now..i can't remember EXACTLY what it's called as I'm no mechanic but hopefully someone can chime in and correct me... it was some kind of solenoid vacuum pump...that relates to the throttle, .that had an air leak of some kind and wasn't pressuring properly. I believe both these issues were found when plugged in by at volvo garage. I know it's a bit vague, but I equally know how bloody annoying it was when it wasn't working!!! __________________ XC60 D5 SE LUX NAV with toys 'n' stuff

Apr 11th, 2016, 03:08	#43
DanielLee New Member Last Online: Apr 11th, 2016 03:09 Join Date: Oct 2015 Location: Hong Kong	Problem fixed. It was the solenoid valve. It's an electronic part located next to the ECM.

Apr 23rd, 2016, 00:57	#44
Manny New Member Last Online: Jun 12th, 2016 18:16 Join Date: Jan 2016 Location: Birmingham	Is this a common issue/part across all newer Volvo's as i have a 2006 V50 2.0 petrol which is suffering from the same misfire/stuttering issue when it gets hot and starts playing up intermittently about 30 minutes after i have been driving it ? i should note that i also have no warning lights on my dashboard either.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)