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Volvo V50 2.0d limp mode after engine swap

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Old Apr 17th, 2019, 18:13   #1
Heanan
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Default Volvo V50 2.0d limp mode after engine swap

Hello,

Let me start by saying I'm new here and after some advice on my Volvo V50 2.0d.

So we had a engine failure on my 2006 V50 2.0d, we sourced another engine from a 2008 with the same engine code etc and went ahead and fit this engine, noticing some small differences along the way main been the MAF sensor and sensor plug and air intake box and pipes. We changed these for the newer model version and now we are left with the car not running correctly and a EML on for a maf air flow.

Any ideas how we can resolve this the engine is essentially the same.
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Old Apr 17th, 2019, 18:27   #2
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The ECU will not match.
The only hope is to get it reprogrammed but even that may be doubtful as even though the engine code maybe the same all the ancillary components will be set up differently.
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Old Apr 17th, 2019, 18:29   #3
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Originally Posted by Bungo View Post
The ECU will not match.
The only hope is to get it reprogrammed but even that may be doubtful as even though the engine code maybe the same all the ancillary components will be set up differently.
surely this is not the case the rest of the car runs fine ? and its only really the loom whats limiting the plug everything else plugs in and fits fine baring this maf sensor plug, they are both still 4 wires just its a different sensor one been siemens and the other not
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Old Apr 17th, 2019, 18:39   #4
Bungo
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Apologies, I read it that the car hadn't been running at all.
I'm amazed the ECU wasn't an issue, result.
Although the wiring may seem the same it may still be the case that the ECU isn't recognising it.
Do you have Dice/vida ? If not you could do with getting the codes read.
Oh and congratulations on the job you've done, no easy thing.
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Old Apr 17th, 2019, 18:44   #5
Heanan
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Quote:
Originally Posted by Bungo View Post
Apologies, I read it that the car hadn't been running at all.
I'm amazed the ECU wasn't an issue, result.
Although the wiring may seem the same it may still be the case that the ECU isn't recognising it.
Do you have Dice/vida ? If not you could do with getting the codes read.
Oh and congratulations on the job you've done, no easy thing.
Thanks it was not me who fitted it was a friend of mine, the only code we had was maf sensor out of range or open circuit unsure which now as i did have a car tuner come and try deleting the maf from the computer but still it leaves the vehicle in limp mode, So it starts and runs nice but just lacks the power, and revving the car feels lazy as if its restricted

The wires on the maf sensors are almost identical in colour we have what i assume two power and two signal cables, the power ones been slightly thicker than the thinner signal cables.

Thanks for response.
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Old Apr 17th, 2019, 18:50   #6
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Quote:
Originally Posted by Bungo View Post
Apologies, I read it that the car hadn't been running at all.
I'm amazed the ECU wasn't an issue, result.
Although the wiring may seem the same it may still be the case that the ECU isn't recognising it.
Do you have Dice/vida ? If not you could do with getting the codes read.
Oh and congratulations on the job you've done, no easy thing.
Attached a picture of the old wiring harness
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File Type: jpg received_369748767215290.jpg (90.5 KB, 9 views)
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Old Apr 17th, 2019, 19:04   #7
Bungo
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If the EML is on and it's in limp mode then it will be totally lacking in any performance.
You say the wiring is "almost" identical so that may be your issue.
Hopefully some one here will have a better idea on the wiring side.
All the best
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