 | Home > Maintenance & Modifications > Low power and won’t do more than 62mph |
 
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20904  
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A good buy, as you never know when you might need it.
Hopefully, will give you some insight to what is going on there. _\Hennessey|Venom| F5/___ ___\⭐️Lone|Star|State/___ ____\We|Will|Win/___ ____/🇬🇧🇺🇸\____ _//*⛽️🛢️⚙️🧰*\\_ |
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17th Jun 2025 3:50pm |
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| BrickBox Member Since: 05 Oct 2021 Location: Wales Posts: 999  
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Which code reader did you go for? 2008 2.4 110 Utility Station Wagon XS.
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17th Jun 2025 5:47pm |
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| Peabod Member Since: 05 Jan 2018 Location: Lancashire Posts: 9 
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I went for an icarsoft lr 3. Seems good can do most things or so I’ve read. I didn’t want to shell out for a gap iid tool as didn’t feel it warranted the expense.
Having read the codes there’s no faults logs but several weird or maybe not sets of data. The absolute throttle position sensor was resting 90 odd % with no input and then 3000rpm. Although on some of the other throttle inputs it seemed to read correctly. The oil level sensor reading 2055v and 127% full. I have just done a service but it’s fine on the dipstick. (At the top but not over full) Dpf is reading 5% on the closed loop and 67% on the open loop ( no idea what that means) The other thing that stood out was the engine input 1-inertia switch- crash signal is active. I’m presuming this is the inertia switch on the bulkhead which would stop the engine running. I have also spotted either a hairline crack in the intercooler or hose that goes from the turbo to the intercooler. Small amount of oil on the pipe and inner wing. Had to remove the grill and surround to spot it. So I’ve ordered a new set of hoses to start and have an intercooler waiting. So all that being said I’m no closer to solving it. Hopefully it’s a split hose and that fixes it if not I’ll be looking at the vcv to replace next. |
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17th Jun 2025 8:40pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8311  
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Split intercooleror hose, sounds like your onto it. Cheers
James 110 2010 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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19th Jun 2025 6:35am |
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| andy63 Member Since: 30 Jun 2023 Location: north east Posts: 785
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The data that is more likely to be relevant in your case is the figures for maf...map..and rail pressure..
As you have found a issue on the air intake side that could well solve your problem .if its serious enough you would expect a code but in any case your map reading should max out and not rise to full boost pressure.. Your absolute throttle readings are only likely to alter when the egr system is active..other than that should be fully open.. The closed loop will only start when the temp is right on your heated oxygen sensor..then your fueling and air requirements will be dictated by feedback from that sensor.. on open loop you will be running on default values.. That would be my thoughts ..👍 |
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19th Jun 2025 10:04am |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20904
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This could well be it, as you mention if there is oil traces then there is a leak, it can also be a loose hose clip as well, if there is a pressure leak then that can cause all sorts of issues with other sensors, as they aren’t reading correctly. I once had a pressure leak near the MAP sensor, I could tell by the oil deposits, originally I thought it was the stainless clip, changed that out cleaned the area up, but it came back. In the end it was a single manifold bolt was a little more loose than it should have been. I don’t know why but it was. Out of the number of fixings there, the torque was supposed to be 12NM or something similar in the WSM (don’t quote literally me here, I’m only speaking hypothetically here). One fixing was around 3 or 4 NM, and that was enough to initiate a very small pressure leak. You can use soapy water and a spray bottle to try and seek it out as well, but might not always be reliable as if there isn’t a load then it won’t always show. If you find oil deposits though, for sure concentrate on that especially if you find little evidence of DTC’s, as a smaller pressure leak won’t always signal that, as it’ll produce a lower performance, but might not meet the thresholds / parameters to trigger a DTC being flagged up. Is the oil level staying okay, or has there been more used? Might be again, difficult to tell. _\Hennessey|Venom| F5/___
___\⭐️Lone|Star|State/___ ____\We|Will|Win/___ ____/🇬🇧🇺🇸\____ _//*⛽️🛢️⚙️🧰*\\_ |
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19th Jun 2025 4:24pm |
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| Peabod Member Since: 05 Jan 2018 Location: Lancashire Posts: 9
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So changed both the hoses, what a pain in the backside that was. Especially the lower hose. No more leaks onto the wing and performed like it should this morning but then on the way home it’s back to low power. (I did forget to plug the coolant temp sensor back in)
There is nothing plugged into the hi low switch so I’m now guessing that it’s that. As I noticed it last night whilst routing about. And the wires that I’d presume should be plugged into it are wrapped together. Having done some research this is a signal wire to the ecu that grounds to the other wire when the vehicle is in low range and then open when in high range. New switch and plug tomorrow at the auto elects and we’ll see if it fixes it. Plus a fuel filter just in case there’s any nasties in the fuel tank. If not I’ll keep digging maybe look vcv and fuel side. |
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19th Jun 2025 7:51pm |
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| Peabod Member Since: 05 Jan 2018 Location: Lancashire Posts: 9
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Thanks for very one that gave advice and help.
So I’ve finally found the fault that was causing it all. The vehicle thought it was in low range as the switch wasn’t plugged in and broken. Worked out how the switch worked and open looped the wires…..boom drives as it should. Didn’t realise that switch made such a difference. Now to get a new connector ordered and fitted. |
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20th Jun 2025 7:33pm |
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| BrickBox Member Since: 05 Oct 2021 Location: Wales Posts: 999
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What a relief 🥳 2008 2.4 110 Utility Station Wagon XS.
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20th Jun 2025 7:41pm |
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| Peabod Member Since: 05 Jan 2018 Location: Lancashire Posts: 9
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Cheers.....saved me a small fortune in replacing parts that didn't need doing.
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23rd Jun 2025 11:11am |
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