TD5 - recent Turbo Lag!

thats a very in depth explanation........

thank you......

As always guys i really appreciate your help,

firstly deffo not fuel there is only one supplier of bio over here and i avoid it like the plague.. and it happened halfway through a tank but thanks DZ

EGR valve could be likely as its intermittent.... and its on the list if things to hit... so not long now till its disabled..

im thinking at 112k that the intercooler hoses wont harm anything if they are replaced... and being very very soft on the turbo side im suspecting also that this could be it as i have noticed when the torque convertor is locked up and i boot it it pulls like mad for a second and then dies off as tho its run out of steam.... been like that for a few months now tho... another thing on the list of things to do....

im also wondering if it could be related to the dash problems im having... not every time but quite often whn starting i get like a reset on the dash... or the instruments go hard in reverse and the lights reset... it has done it a few times for a minute or 2 and has done it a long while after start up too... probably not related tho!

anyway will check out tomorrow or on that way to take sis in law (yay) and family in law (boo) to the airport on sunday!

thanks muchly once again

steve

When I changed my intercooler hose's I got a bit more power out of mine (I went silcone way)


Adam

gentlemen dont know if it will help but I think the problem is related to the wiring loom feeding the injectors engine oil damages the cables which causes minute delays in signal transfer from the ecu .LR recommend that they be changed every 64k-km and are available form a bermark/britpart supplier for 40-50 euros ,also look at a cat replacement pipe alot of horses available there

been there done that and modified the harness too... so im pretty sure its not that, and the symptoms are normally rough running and misfire... or other wierd things!

stacks of info about the harness if you search too...

Thanks

Steve

what way is the charge pump?

Quote:

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Originally Posted by 5teve

Hi Guys

just drove home and noticed the Disco II TD5 was a bit lumpy accelerating. just nothing and then everything a second or so later.. so been playing all the way back and something is wrong...

if i drive carefully (ie accelerate at slow rate so turbo can spool up) then all is good.. if i hit the loud pedal fast (at around 2000rpm) then you can feel the engine trying and a second or 2 later bang... loud pedal kicks in and a cloud of soot comes out the back... and you get thrown back into the seat... its as tho something is stopping the turbo from spinning up properly..

any ideas? stuck wastegate, collapsed (or nearly) intercooler hoses, blocked airfilter?

by the way its got one of tombraiders programs running and has been impecably for about 9 months..

thanks

Steve

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I had the same trouble recently.Turned out to be the turbo valve diaphram perished.
You will see the valve just under the air intake tube held on by two small bolts.It has 2 small hoses connected,one which goes to the wastegate actuator.Check that the hoses are o. k.If you disconnect the valve and can blow through it,the diaphram is gone.
New part is approx. $60.

Cheers....Trev.

Hi Trev
I have a new spare one of these.
I just checked it,with no power connected you can blow thro the lower inlet port and it blows thru to the wastegate port.
Im thinking the 12v power supplied by the ECU closes the valve stopping you being able to supply air pressure(BOOST) to the wastegate,the ECU should open the valve to supply boost to the wastgate to open it at the correct boost level.
With your blow test did you have it plugged in and ignition on????
Thanks for the post,I will fit the newie and let you blokes know how it goes.
Andrew

Ive just replaced the part Trev mentioned as I had a spare.
It actually does go a bit better,perhaps it was faulty.
The turbo sounds better,low end is improved,towing will really show it up.
I belive I still have problems,will see if I get some fuel economy back.
Fairly convinced my MAF sensor is faulty.
Andrew

thanks guys for the info will look at them all

Andy.. what were your symptoms? i have noticed my economy had suddenly seemed to go bad... but i was guessing a ton and a half of boat on the back wasnt helping too much.. but to take out 250k's from my normal tank of 750 - 800k's over a tow of 240k's seemed a bit much... (i ended up with 550k's to the tank) also seemed to be smoking a bit towing it.. (which i guess is where the fuel went)

so over the weekend i have been watching it. All of saturday i was having my dash problem - dead for 30 seconds to a minute every time on startup.. but at no point did i have the lag problem..

yesterday we took the boat out.. towed it to the city... didnt seem any lag problems and only had one instance of dash resetting while driving. but i had the lag problem first thing (4am) going to the airport.

this morning started the car.. dash on 20 seconds later.. and laggy all the way down the freeway.. sitting at 2k rpm boot it and get a small increase for a second then my head got torn off.. interesting thing is that if you do it when the torque convertor is locked the boost causes it to slip as tho it is over boosting.. however it doesnt do into limp mode so not overboosting that much..

also once the boost has kicked in there does seem to be enough power.. and if you accerate slowly enough then the power comes on ok..

due to the intermittentcy of the problem i would be guessing a sensor or a semi stuck something somewhere..

i guess i best get shopping for ...

silicon hoses
egr blanking kit
turbo valve diaphram
some magical fix for the dash problem!

Thanks

Steve