Under Powered :-( And A Pipe Keeps Splitting :-((

[ricki]

Hi all,

 

Since my starting problem i eventually had fixed, my Galaxy MKI TDI seems to be playing up. IF i accelerate reasonably hard it seems to miss and then i seem to lose power, but if i turn car off then start again then its fine again. It was stood for two weeks while i sorted the starting problem out but wouldnt have thought it would be the fuel filter would it?

 

 

Also i have a 3 way pipe that comes off the water pump and oil filter and engine that keeps splitting every 3 months. It costs me

[zorgman]

cars going into limp mode, if this never happened before doing the starting fault go thru all the pipes. new one on the pipe tho is thermostat ok does the car overheat as in the best temp i get in this weather is just under the first mark

[ricki]

cars going into limp mode, if this never happened before doing the starting fault go thru all the pipes. new one on the pipe tho is thermostat ok does the car overheat as in the best temp i get in this weather is just under the first mark

 

Thanks for reply, the temp gauge on mine goes to the O in the norm if i drive 15-20 miles but never goes above that.

When you say "limp mode" is this because the engine thinks its overheating?

[andy936]

Turbo is cutting it self out usully from over boost-can be many things-look at tdi turbo issues on this forum-pm me and let me know how you get on as ive same problem but mine only happens once in a blue moon

[zorgman]

year and power of your car ie 90 pr 110 tdi or pd very important info to help you

[mark.aa]

mines doing the same 98 ghia X manual 110bhp tdi with 218k on the clock.

runs fine in first and second but if i give it beans in third above 3000 rpm the turbo shuts down and and its in limp home untill turn off and on,

tried the air mass (MAF)from a working friend car.NO

checked all vac pipes .

sucked on vac pipe to vac actuator on turbo that moves the variable vains and can feel it moving and comming back by itself when vac removed

sucked on the vac pipe to the ecu thats well hidden in dash and theres no leak there.

even took out the ecu(fun)opened it up and checked the pipe to the map sensor ,it was ok

had a fault code for control unit failure 633? so thats why i took the ecu apart.

some times it missfires and smokes when the turbo shuts down.when clears

hope we both fined the cure,

Edited April 4, 2010 by mark.aa

[zorgman]

by how far did the actuator move on turbo as it needs to move approx 1/4" if i think on, would still go for turbo myself as te 110 are terrible for vanes sticking

[mark.aa]

vain accuator moved about 15mm.

[ricki]

year and power of your car ie 90 pr 110 tdi or pd very important info to help you

 

Sorry for delay in reply, ive been away for a few days but its a 1999 (V) and it's the 90 as far as i know

[zorgman]

right 90hp uses norm turbo 110 a vnt. the 90 dont suffer the vanes sticking and the 110 dont sound vanes sticking if you have that amount of travel when u suck.

for the pair of you id check your vac hoses pay attention to where they connect to joints etc and sharp bends. id also change the hose internal on ecu as it goes claggy and soft so can get a pin hole in it,

you do need a diag check see what codes are there BUT you need any in there erased before you do a run so you know whats old and new, im in sunderland so bit far for you to travel

[Neils TDi again]

It would be worth checking with a digital multimeter the throttle pedal position sensor as it has two converging resistance tracks and if one is damaged or faulty then it get a missing signal when trying to relate pedal position to engine speed and this is normally only if you are giving it "beans" as the pedal is in a full down position which is not the normal driving area.