31 minutes ago, Zimo said:

could it be the clogged vent pipe a reason of bogging?

Yes. No promises, but the point of the vent pipe is to stop the fuel pump having to depressurise the tank to supply the engine.

7 hours ago, Zimo said:

could it be the clogged vent pipe a reason of bogging?!

I doubt it. You said the car is bogging when NOT under load, that is when minimum fuel is needed. The fuel system delivers a high flow but not a low flow? Not logic.

So after doing a 400km trip to get the hard cover for the bed, seems that the problem is vanished. Maybe it is just the 40kg weight increase of the top required an increased throttle pressure which avoid the problem....

I bought an STP diesel injector cleaner to add in the tank, do you think i have to use it? 

30 minutes ago, Zimo said:

I bought an STP diesel injector cleaner to add in the tank, do you think i have to use it? 

It is your money. "Add-in-the-tank" super mega ultra amazing additives business is a multi-billion dollars scam. Marginal (mostly psychological) effects for the high price.

18 minutes ago, RicardoM said:

It is your money. "Add-in-the-tank" super mega ultra amazing additives business is a multi-billion dollars scam. Marginal (mostly psychological) effects for the high price.

By then i have already bought it , i was just asking because i remeber i have ridden something  somewhere here about use the worst "sluggiesh" diesel in this engines  was better than use expensive cleaner diesel fuel....

5 hours ago, Zimo said:

i remeber i have ridden something  somewhere here about use the worst "sluggiesh" diesel in this engines  was better than use expensive cleaner diesel fuel

Use exactly the diesel recommended by Skoda. Do you want injectors cleaning? Do it in a garage that has special machines. They remove all injectors, put them in that machine, evaluate their health then clean them.

So open again this... just before changing the battery the felly start to have strange behaviour: have some sort of hesitation when starting also from cold and more fuel consumption. Changed the battery and the start seems to be slightly better( but not always) and still remain fuel consumption. Then reappear the cause of this tread even though way less noticeably.... 

Ideas?😁

Edited 12 December, 20196 yr by Zimo

Going crazy! This morning (but it has alredy happened) preheating glow plug light at max 2/3 sec with an external temperature of 4°C and struggled to start: it started in 1 shot of key but like has had a 1 second of stop working.... like old dead battery .....

Whatever the problem might be, the most efficient way to DIAGNOSE the problem is to look for errors stored by ECU. Asking us what might be is not productive since there are a lot of possible causes. You have access to the car, we don't. The diagnose part is your job. We can help by telling you what to do after you find errors.

1 hour ago, RicardoM said:

Whatever the problem might be, the most efficient way to DIAGNOSE the problem is to look for errors stored by ECU. Asking us what might be is not productive since there are a lot of possible causes. You have access to the car, we don't. The diagnose part is your job. We can help by telling you what to do after you find errors.

And the proper way is to find a skoda shop to make them read my "unit"? Right?

Not necessarily. There are many Felicia owners that bought the OBD interface and associated software to diagnose the car themselves. Now they are independent from any garage in terms of diagnose. No more guessing and pay them through the nose.

1 hour ago, RicardoM said:

Not necessarily. There are many Felicia owners that bought the OBD interface and associated software to diagnose the car themselves. Now they are independent from any garage in terms of diagnose. No more guessing and pay them through the nose.

I saw here on thw forum some "confusion" about the right obd interface to get. I alredy have an obd2 Bluetooth reader paired with Torque pro app for my toyota. For the felicia i need a simple obd reader? Product suggestion?

You'll need something like this and a laptop. Your existing interface will not work.

15 hours ago, RicardoM said:

You'll need something like this and a laptop. Your existing interface will not work.

Ok but this is an obd2 wire, do it works on the felly?

Read full description link in the ad.

10 hours ago, RicardoM said:

Read full description link in the ad.

Ok it works on felicia so with pick-up! I think i buy!

I add also this....black oil leaks ....are u thinking this can influence hot start problems or something? 😅😅

Other think i note this days. seems that If i let engine idle few seconds before turn off engine it stop smoothly and start better. At contrary  turning off shake a lot and starting is worse....

Diesel engines only need fuel, air, and compression to run.

 

Almost all hot-crank-no-start issues are due to the injection pump. As the pump gets worn, tolerances increase, and with thermal expansion they no longer make sufficient pressure to pop the injector. They will run fine once started because idle RPM are much higher than starting RPM, and the pump can produce enough pressure.

 

The other possibility is leaks. When hot, fuel line unions may leak fuel or air, depending if they are before or after the fuel pump. This can make the injection pump lose prime. If cold starts are long crank, look for leaks. If cold starts are normal, look at the injection pump.

1 hour ago, RicardoM said:

Diesel engines only need fuel, air, and compression to run.

 

Almost all hot-crank-no-start issues are due to the injection pump. As the pump gets worn, tolerances increase, and with thermal expansion they no longer make sufficient pressure to pop the injector. They will run fine once started because idle RPM are much higher than starting RPM, and the pump can produce enough pressure.

 

The other possibility is leaks. When hot, fuel line unions may leak fuel or air, depending if they are before or after the fuel pump. This can make the injection pump lose prime. If cold starts are long crank, look for leaks. If cold starts are normal, look at the injection pump.

Many thanks for the explain. 

-So could the black oil laeks from the air box means loose piston compression? 

-so now that even the hot start are not always good, may i have to re-check all fuel lines . And all this factors can influences fuel consumptio?

Many thanks

3 minutes ago, Zimo said:

So could the black oil laeks from the air box means loose piston compression?

No. You should investigate where it comes from and proceed accordingly. A leak is not always something that kills the engine but can make it run bad.

5 minutes ago, Zimo said:

so now that even the hot start are not always good, may i have to re-check all fuel lines . And all this factors can influences fuel consumptio?

Now really, what do you think?

3 hours ago, RicardoM said:

No. You should investigate where it comes from and proceed accordingly. A leak is not always something that kills the engine but can make it run bad.

Ok any suggestion where start , waiting the obd cable to arrive?

3 hours ago, RicardoM said:

Now really, what do you think?

Re-check ok accordingly to your explanation.  But for the fuel consumption don't know because engine , apart grom start , seems to run fine : no smoke , no bad smell (exhaust or fuel )

On 13/12/2019 at 08:02, Zimo said:

Going crazy! This morning (but it has alredy happened) preheating glow plug light at max 2/3 sec with an external temperature of 4°C and struggled to start: it started in 1 shot of key but like has had a 1 second of stop working.... like old dead battery .....

 

Might be worth checking and cleaning your battery connections and earthing points if you get half an hour spare. Might fix it, might not, but it can't hurt. 

2 hours ago, StevesTruck said:

 

Might be worth checking and cleaning your battery connections and earthing points if you get half an hour spare. Might fix it, might not, but it can't hurt. 

Thanks for the suggestion! I have had 10 min in the work lunch brake and i spried the almighty WD40 on the battery connection, on some earthing points, and on  the 4 connection to the glow plugs : nothing remarkable but the glow plugs stay on firmly.... don't know if it's a case.....

Hello floks! How are u spending this crazy moment due to the covid? I rested home from work for 2 weeks so finally i had the time to change the upper front flange of the cooling system, with the oring and new temp sender, flush the coolant system and new coolant liquid: now the felly start well even when hot and performing good. The temp sender was bought from autodoc for around 6€ , is the topran one with the green band.  It solves also the strange behaviour of the glowing plug that sometimes stay on for few seconds and sometimes 10. 

The pickup seems to work at a slightly high temperature( the temp gauge show 1/2 mm above 90° ) so i think i will have to clean the radiator and mayba waterpump , but besides this I'm very happy!

Take care all of you

Edited 17 April, 20206 yr by Zimo