underpowered 300tdi disco...

Norledge · Winch Assistant Joined: 13 Mar 2009 Odometer: 77

hi all...

Recently changed head gaskets on my 300... Done them before so now real issues...

Only problem comes now it's finished... Car starts and idles fine, but has no power past 2k rpm... And i mean nothing... Almost as if there is no boost... But there is!

Basically i've tried most things i can think of but to no sucess... Anyone on here have any ideas???

Nathaniel · Posted: Wed Dec 16, 2009 11:08 pm Post subject:

Change the fuel filter first?

Ray_Jnr · Posted: Wed Dec 16, 2009 11:09 pm Post subject:

have you plugged the pipe from the turbo actuator back into the fuel pump?

are your tappets too tight? if they are the valves will never fully close and youll get low compression.

did you mess with the timing at all?

bertie_bas205 · Posted: Thu Dec 17, 2009 6:05 am Post subject:

Check all yer pipes from the turbo to inlet are tight......
At the cooler too....

Bertie.

old110 · Posted: Thu Dec 17, 2009 9:05 am Post subject:

replace fuel filter and fill with injector cleaner.
Check the fuel lift pump. My brand new s**tpart one failed after 200 odd miles. Genuine one in now and it will actually rev above 2k.

All the turbo hoses as mentioned, also check there are no blockages in the turbo to injector pump boost pipe as with boost you need more fuel.

Maybe adjust the starwheel in the injector pump to reduce the loading on the spring that the boost pressure pushes against to allow fuel in easier?

Nathaniel · Posted: Mon Dec 21, 2009 6:42 pm Post subject:

terence · Guest

have you nipped the boost pipe under the head , when you torqued it down ?

Norledge · Winch Assistant Joined: 13 Mar 2009 Odometer: 77

thanks for the replys... Sadly i've done/checked everything mentioned, bar the lift pump... Will try a new one tomorrow...

Ray_Jnr · Posted: Tue Dec 22, 2009 8:23 pm Post subject:

buy a good lift pump, not a one of those £9 200miles down the road and derv p*shing out all over the place because the diaphram is made from chewing gum. Wink

Norledge · Winch Assistant Joined: 13 Mar 2009 Odometer: 77

luckily i work for lr so got a genuine one today for £20 :p

gripper · Posted: Wed Dec 23, 2009 8:42 pm Post subject:

i had a faulty stop solonoid once that was sticking and only partly opening and restricting the flow of fuel into the injector pump, try removing the plunger to allow full flow. don't forget you'll need to stall it to stop the engine though.