low fuel pressure common rail and glow plug MIL

[Sibu]

i have a yellow MIL glow plug indication. The yeti loses its power after riding 2 km and goes with way less power. 

changed the fuel filter , pressure regulator relief valve on the common rail and still the indication.

the ride when it loses power is extremely smooth so i cannot suspect EGR issues either.

The CP4 HPFP seems to be good. No yellowish content on the pressure regulator sensor filter either.

 

Model Yeti 2011  2.0 l , 140HP , 103KW , 4x4 AWD  TDI engine

Edited 12 January, 2018 by Sibu
additional comments

[Urrell]

As you are aware the glow plug light could be a multitude of different problems.
Have you checked the car for fault codes?
The low power is it probably going into limp mode rather than fuel starvation.

[Llanigraham]

Agree with Urrell, your car has gone into limp mode.

Your only answer is to get the fault codes read as there are too many variables with that light on. 

[Sibu]

it is with the authorized service center. They changed the fuel pressure regulator sensor but the case remains. 

The car starts well but after 3 to 4 km , it loses power and the glow plug lights up. However we can go all the way to our destination without any problems ! 

 

what else can we check ?

 

the service techs in my town are not too familiar with the situation .

[Sibu]

49 minutes ago, Urrell said:

As you are aware the glow plug light could be a multitude of different problems.
Have you checked the car for fault codes?
The low power is it probably going into limp mode rather than fuel starvation.

yes , something like a limp mode. definitely not fuel starvation. Also the ride is extremely smooth except there is no boost power.

[Urrell]

Are you saying it's the turbo that's the problem?
Have you checked for fault codes?

[Sibu]

1 hour ago, Urrell said:

Are you saying it's the turbo that's the problem?
Have you checked for fault codes?

Actually through VCDS, we are getting only the P008x code related to low fuel pressure.

I dont know what the skoda authorized center has done. Its been with them for more than 1 month !

What all possible componwnts can we check for such a problem.

Edited 12 January, 2018 by Sibu
attached fault codes

[weasley]

If the filter has been changed it could be the fuel pump itself, a bent or restricted fuel line or a bad fuel pressure sensor (or wiring).

[Sibu]

Actually to understand the problem more in detail, I told the Authorized service center to  isolate the problem if it  is before the HPFP pump or after  HPFP pump.

For this we can do a simple test to check the fuel pressure ( approx. 3 bar) through the car diagnostic tool in ignition OFF condition and fuel pump switched ON and also to check the fuel flow rate after the HPFP pump at the high pressure output ( 660ml in 30 secs)  . This is VAG standard procedure.  These authorized centers still haven't done that simple test and simply deduced the fact that the pressure relief valve sensor at the common rail is at fault and waited for a month to get the spare part !Then they say the problem still remains !

 

So now I am thinking of collecting all the possible causes for such a glow plug MIL indication .

[Sibu]

Finally we have found the problem. Ironically it was not the Skoda dealer who found the problem but a local mechanic who does only SKODA / SEAT/ VW/ AUDI works.

My injectors and fuel HPFP had to be replaced with a refurbished one.  The glow plug indication has gone and the car has come to full power.

 

Total cost USD 1230 ! !

 

The reason for this has been concluded that I used  additive in the fuel tank where  dirt gets mixed with fuel and water and throws out particles through the HPFP pump and injectors.  I actually used XADO diesel fuel treatment and sometimes X1R diesel treatment .   And the mechanic caught me spot on with his query  !!

[Sibu]

UPDATE

On further investigation, it is now concluded that the High pressure fuel pump failed becos of no fuel in the fuel line . Engine cranks for a longer time but does not start becos the ECU does not provide the relevant signal to the fuel pump. This condition happens after a long journey  when a restart is applied to the engine from OFF position,

 

When the engine is cranked ,  ECU must switch on the fuel suction delivery pump located inside the tank.

 

CAUTION

The engine should not be cranked until you see the ignition coil and engine management indicators on the cluster panel, If you do not see this indication on the cluster panel, it means the ECU has not supplied signal to the fuel suction delivery unit inside the tank.  Wait until the indicators pop up on the cluster panel.

[Sabarish]

My skoda Laura figures the same problem . Within 2kms that glow plug warning engages , loss in power. Scanning says commen rail problem low pressure . Help me to solve this problem  @Sibu