loss of power in 5th gear

[philco]

I hav a 300 Tdi and have been loosing power in 5th gear, I have been driving on the M1 to work each day and she powers up to 95-100kmh in 4th ok but when i go into 5th gear its all good on the flat until i start up a small incline. I will be doing 110kmh then she just won't hold it on any incline and the steeper the hill the slower she goes.
I will need to do an oil/filter change in 1000k but everything else looks ok in the engine bay.
there is a slight leak out of the rocker cover and the oil rubber tube that goes from the head cover to the block. (6 inch long pipe with an elbow at the top)
Any ideas would be appreciated.

[PAT303]

What size tyres do you run?. Pat

[Reads90]

Go and get some diesel addative and put that in. There is a slight problem with the 200 and 300 tdi and that is that these days diesel has a low amount of sulphur in it and the injector pump needs it to work to work at it's best. So putting addative in to the fuel puts that back in and then gives you back the mid range torque which is what you are missing. Makes road driving and hill driving alot better

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[ugu80]

1st - check for water/gunk in the fuel (valve at bottom of fuel filter). Will it rev out in lower gears? If not - injectors and or fuel pump.

[woko]

Check the hose on the top of injector pump that goes to the turbo. They can melt or split, but the loose power in every gear. still needs to be checked.

[philco]

high revs in each gear sounds like its pounding its own exhaust. I will look at the hoses.

[philco]

What size tyres do you run?. Pat

its only been in the last week, but i have 235/85/16 MAXXIS on at the moment.

[philco]

Go and get some diesel addative and put that in. There is a slight problem with the 200 and 300 tdi and that is that these days diesel has a low amount of sulphur in it and the injector pump needs it to work to work at it's best. So putting addative in to the fuel puts that back in and then gives you back the mid range torque which is what you are missing. Makes road driving and hill driving alot better

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I did add a liquimoly Diesel anti nock Plus to the last tank of diesel i bought, maybe it loosened some dirt etc as it went thru the fuel line.

[ugu80]

its only been in the last week, but i have 235/85/16 MAXXIS on at the moment.


They are the same rolling radius as the standard 7.50 x 16, so they are not the problem.

[LandyAndy]

Check the throttle cable adjustment.
Its a common issue on the TDi.You may not be getting full travel.
Andrew

[PAT303]

Check the throttle cable adjustment.
Its a common issue on the TDi.You may not be getting full travel.
Andrew

Thats the next thing to check. Pat

[philco]

I went to super cheap and got a German made injector cleaner, went for a 20 min run up the highway and noticed it start to gain a little more power in the last 5 min, will see how it goes tomorrow, i will check the throttle cable also, thanks.

[ugu80]

A little fuel doctor (the green stuff) with every tankfull will keep injectors running clean.

[weeds]

air cleaner.....been over any really dusty roads of late

[philco]

Weeds, city driving mostly, tried the injector cleaner it helped a bit, but still it looses a bit of power, I think i will try another dose of injector cleaner after oil change on the weekend.
I think i will look at getting new glow plugs and maybe the injector pump looked at.

[philco]

Figured out the problem, the plastic outlet pipe on the fuel pick up in the side of the tank, from the tank to the fuel line where the fuel gauge is , had deteriorated and cracked so it was sucking air into the fuel line and loosing power.
I replaced the fuel pick up with a new unit and connected them with a clear piece of pipe so can see the fuel flowing, will put in a small line filter with reinforced fuel hose as a more permanent fix.
I called British off road in Sunshine coast about a second hand fuel pick up and they said it was a common problem that they become brittle and break after awhile.

[landoman]

Got a problem similar to discussed here .......new defender ....a month old
...........was running fine ......took it for a good drive to test it out ...200 ks there and back .......all good ....on the way home Engine light came on and on freeway lost power at 5 and 6 gears ........pulled over stopped ......turned off ignition ....restarted .....all good up to 5 and 6 gears ...lose power .........got off freeway and got home going no higher that 4 gear

Took to dealer .....changed an airs sensor? .....tested problem still there .......
Changed EGR ........problem still there ........
Appears to be an issue when the engine has had a good run at speed ....on freeway .........going back to shop to see what else can be done ........hope this can be found and fixed as loss of speed on freeway or in the middle of nowhere and limping along in 4 gear is not fun .............

[PAT303]

Remove the filler cap and see if it still does it,has it been serviced lately?,I've seen loose fuel filters causing this trouble. Pat

[landoman]

Brand new car ....so no service .....
What would removing the filler cap logic be ?
......and loose fuel filters might be worth thinking about .....how would you check that