TD5 Overboost/Misfire

I just think I'm getting somewhere then something else crops up! Driving to work this morning and pulled out of a junction and the engine light came on and now power. Seemed like it overboosted however there is no overboost fault, just "15,2 High Speed Crank (logged)". Got it in the workshop and revved it up stationary and bang, same again and it was idling VERY rough. This happened at around 2000rpm. Switch off and start it again and it idles fine
The crank fault suggests a faulty CPS, however the fact it only does it at higher revs confuses me.

replace the CPS to rule it out cos it can fail in many ways but make sure that the connector is in good shape cos it used to have loosened contacts too

sierrafery said:

replace the CPS to rule it out cos it can fail in many ways but make sure that the connector is in good shape cos it used to have loosened contacts too

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Could an overboost cause a high crank fault ?

I dont think so but the high crank fault can seem like overboost

Ok so I’ve took mine off and found a spare one on an old bellhousing. Mine is the one on the right

Update: the "other" crank position sensor has worked! I'll get some genuine ones ordered
actually just seen the price of genuine ones!! Britpart £17.98+VAT, Allmakes £22.60+VAT, Lucas £124.73+VAT, Land Rover £247.22+VAT

Try ebay i managed to get a genuine one for £80 from MPS i think

bankz5152 said:

Try ebay i managed to get a genuine one for £80 from MPS i think

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Cheers I've just had a look, there seems to be more brands available on eBay. Not sure what the best is though out of Valeo, Blueprint or Hella ?

There are other versions too: https://www.onlinecarparts.co.uk/oenumber/nsc100790.html get Valeo or if you want even cheaper Hella, these two brands are verified as being reliable, dont mess with Britpart or Allmakes cos those are definitey chinese sh*t, ...the Lucas is OEM

sierrafery said:

There are other versions too: https://www.onlinecarparts.co.uk/oenumber/nsc100790.html get Valeo or if you want even cheaper Hella, these two brands are verified as being reliable, dont mess with Britpart or Allmakes cos those are definitey chinese sh*t, ...the Lucas is OEM

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There is a Valeo one for £25 !! https://www.ebay.co.uk/itm/New-Genu...=item2cd7c3b2bc:g:CdEAAOSwyARbSg2g:rk:11:pf:0

tom1979 said:

There is a Valeo one for £25 !! https://www.ebay.co.uk/itm/New-Genu...=item2cd7c3b2bc:g:CdEAAOSwyARbSg2g:rk:11:pf:0

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That's OEM Lucas which maybe doesnt meet LR's imposed limits to be LR genuine but still ISO compliant... like in the hubs or MAF sensor's case others than LR genuine are all lottery but at least get one made in Europe and rely on your luck