Russell-31
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Hi, i'm Russell just bought a disco 2.. Love it but am finding some lack of power there is no smike but i do think it's turbo related. Anyone shed any light on it?
Disco 2 Lack of power
- Thread starter Russell-31
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Mark Ormond
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Could be the waste gate control valve, if you are sure its a turbo issue
can cause both under and over power if faulty.
Why do you think its turbo related
can cause both under and over power if faulty.
Why do you think its turbo related
Russell-31
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Well like i say there isn't any smoke, but it seems low on power and the turbo doesn't seem to kick in till about 1,900 -2100rpm and when it gets hot or i've done a long drive it seems to pull when i put my foot down and then cut iut and drive like it has no turbo and then it'll pull again.. If you know what i mean.
discodrivercumbria
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Auto or manual, mileage. Egr on or off, last serviced, fuel filter etc????????
need a bit more info mate! wastegate seized? intercooler hoses de-laminating?? a host of problems!!
need a bit more info mate! wastegate seized? intercooler hoses de-laminating?? a host of problems!!
Russell-31
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It's a manual, not sure about egr?
Just had a full service, so all filters done oil changed all that jazz. 78350k... I just hope it's not a really expensive problem... But the turbo sounds ok and theres no smoke just seems intermitant when it's really hot...
Just had a full service, so all filters done oil changed all that jazz. 78350k... I just hope it's not a really expensive problem... But the turbo sounds ok and theres no smoke just seems intermitant when it's really hot...
Landmark2
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Hi, I don't think you'll find the turbo kicks in till about 2000 revs.
Bennehboy
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What year is it?
Russell-31
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It doesn't i can feel it start to pull about 1900 rpm.. Just weird that once hot or i've been driving a while power seems rea
2002.. 51 plate. 78500k
Bennehboy
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OK a few options and things to check from free to most expensive (some mentioned above)...
* get a pair of molegrips onto the wastegate actuator arm, you should be able to push the arm toward the actuator, it'll be stiff because you're fighting against a 16spi spring. if you can't get it to move you'll need to remove the turbo heatshield, unclip the arm from the turbo and WD40 the wastegate arm and free it off
* clean the MAP sensor, it's on the inlet manifold
* clogged air filter - eyeball it
* delaminated tubo hoses, take them off and look inside them to see if they are collapsed, replace with silicon
* wastegate modulator failure - find this at the end of the small hoses connected to the turbo wastegate actuator, if this fails it can cause an overboost scenario where the ECU cuts fuel, I would NOT expect to see this happening at 1900 rpm though.
* clean or remove the EGR system, it could be stuck.
* disconnect the wiring from the MAF and see if performance improves. If it does, replace only with a VDO MAF - these are the OEM, should be about 65 quid
* 02 vehicles have a CAT in the downpipe, it's common for these to clog, if this happens performance is pants. Replace with a decat downpipe.
* failing fuel pump and/or fuel pressure regulator, bit harder to check for but you need to be seeing 4 bar of fuel pressure at the FPR - can only be checked by putting a pressure gauge into the hole that the fuel temp sensor sits in.
Getting it hooked up to diagnostics and someone eyeballing the data would potentially be a much faster route to diagnosis.
* get a pair of molegrips onto the wastegate actuator arm, you should be able to push the arm toward the actuator, it'll be stiff because you're fighting against a 16spi spring. if you can't get it to move you'll need to remove the turbo heatshield, unclip the arm from the turbo and WD40 the wastegate arm and free it off
* clean the MAP sensor, it's on the inlet manifold
* clogged air filter - eyeball it
* delaminated tubo hoses, take them off and look inside them to see if they are collapsed, replace with silicon
* wastegate modulator failure - find this at the end of the small hoses connected to the turbo wastegate actuator, if this fails it can cause an overboost scenario where the ECU cuts fuel, I would NOT expect to see this happening at 1900 rpm though.
* clean or remove the EGR system, it could be stuck.
* disconnect the wiring from the MAF and see if performance improves. If it does, replace only with a VDO MAF - these are the OEM, should be about 65 quid
* 02 vehicles have a CAT in the downpipe, it's common for these to clog, if this happens performance is pants. Replace with a decat downpipe.
* failing fuel pump and/or fuel pressure regulator, bit harder to check for but you need to be seeing 4 bar of fuel pressure at the FPR - can only be checked by putting a pressure gauge into the hole that the fuel temp sensor sits in.
Getting it hooked up to diagnostics and someone eyeballing the data would potentially be a much faster route to diagnosis.
Russell-31
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Wow geez thanks very much. I'll be working over the weekend on those. I'm assuming you can by decat downpipes off ebay quite cheap or a scrappies.
Bennehboy
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Yup
