Freelander 1 MAF Expert required ! - Solved

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andyfreelandy

Well-Known Member
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Devon
So - previous thread identified from air temp and manifold pressure a MAF sensor problem although no fault codes. Purchased a new one from Ebay - about £25 so not top of the range !

Fitted, solved original problem which was poor starting and hunting on tickover, but now it puffs Black smoke when the throttle is stabbed or when working at about turbo speed (17 - 1800 rpm).

So - removed and refitted old MAF, smoke gone, hunting back !

What's to do next please !?!?!?!?
 
Fair point ! However, I have a theory. The car has 2 faults. The new (cheap) MAF is putting the car back where it should be, it is more driveable. But another fault is causing something that wasn't seen with the previous (duff) performance. All live data readings on the new MAF look good.

I am going to check and re-check all is airtight in the intercooler path. Anyone got a diagram of how the air gets into the engine via the turbo. Pipes seem to go everywhere !!! Also - is there a link in the air intake (black box) to the intercooler pipe on the same box??

Thanks
 
Also - is there a link in the air intake (black box) to the intercooler pipe on the same box??
i hope not :)
i know what it looks like .. but that would mean unfiltered air getting into intake manifold
also reducing airflow over the maf sensor .. so all in all it wouldn't make sense to design it that way

no diagram to hand ..
but .. in short .. air flows via the intake to the air filter housing ..
then thru the maf sensor .. down the back of engine to the turbo
from the turbo to the intercooler via a hose at bottom / side of engine
then thru the intercooler exiting via the intercooler top hose to the egr valve
thru the egr valve to the intake manifold into the cylinders via the intake valves ..
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i think there is a diagram online .. will see if i can find it ..

( edit ) bunch of diagrams here .. but it doesn't show the complete air intake route etc.
http://www.allbrit.de/NAV.cfm?PAGE=594986&SPRACHE=EN

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Figured it wouldn't but there are slot type marks on the case ! Thanks for the explanation. and link.

I'm onto it !
 
but there are slot type marks on the case !
probably to help keep it rigid / strengthening ..
if that part were flat all along it would probably crack from vibration .. at a guess ..
i once tried to get some wire down those slots .. just to see ..
came away with the impression they were definitely blocked ..

you could always go down this route for the intake .. :)
https://www.landyzone.co.uk/land-rover/intercooler-problem-mod.126484/

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O.K so stripped out all intercooler pipes, checked and double checked them for leaks / porous areas. Refitted all and still slight black puff when accelerating (with new MAF). So - removed and refitted old MAF - car runs rough but no smoke. Ran car with no MAF - car bit better but not as good as with new MAF. Checked fault codes appeared o.k and unable to reset. Refitted new MAF - reset codes and all seems fine !! For now. So thanks. Maybe electronics does not see new one until fault generated and then reset???

Anyone got the crank pulley removal tool in Berkshire please? Now need to get rid of noisy pulley. Ordered parts, LR wanted £351 +VAT for pulley !!!!

Or - has anyone used the fit socket and bar and crank method - sounds like ti might do damage - but seems to work according to other OPs.

Will change belts and replace front oil seal at same time.
 
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