D.FYLAKTOS

Then i will need a new gasket plus a reset from a VAG-Com plus at least 50Km route so the ECU will read the new data then again a visit to mechanic for another scanning. It's too much job for me. When the weather gets warmer i have the thought to spray from both sides (vacuum hoses) plus from a full open throttle inside the manifold and let it soak enough before i start the car (far away from house due to the white smoke).

If you do it by yourself yes a little bit with a lifting jack or other way, you need some space to reach the oil drain plug. Take the new oil filter, apply some oil on his gasket and then screw it ,put some oil from above and start the car for 4-5 seconds so it will soak some inside, then fill till the stick shows the level reached the Max (total will take about 4,3 till 4,5 litres)

Yes but year after year, cleaning after cleaning something will have been remain at the bottom of the manifold? Doesn't restrict a little bit the flow of the air? And if all of that dirt (with the spray) is driven at the combustion chamber will be completely burned or can make things worst?

Skoda manual says Champion RC89PYC, the same is on Haynes manual that's why i hesitate to make any change (the NGK didn't work, some Iridium didn't work) but nor me or the mechanic measure the gap ever. Just plug and play and there is a rumour that those which have that protective cap are already been adjusted from the factory.

Every time you open the throttle for cleaning you can see that some dirt is on the disk so after 22 years some kind of dirt wouldn't be inside that manifold?

It's a risk that i can not take it by myself, i have to ask the programmer, i don't want to make experiments with sparks plugs. As for the change of brand it's a mess, here is an example from an Uk store: https://www.sparkplugs.co.uk/compatible-parts/spark-glow-ignition/spark-plug-100151?ktype=11193&vtype=P and as for cross-reference then it's a huge mess: https://www.sparkplug-crossreference.com/convert/CHAMP_PN/RC89PYC 😲

The parts e-shops give those Champion as an option and to be honest i forgot to ask the programmer if i need a different type of spark plugs. I have the SKODA FELICIA II (6U1) 1.3 with AMH motor code. I still wonder.

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Skoda gives the Champion RC89PYC as ''factory spark plugs" for Felicia. An NGK Copper never worked for me, i have a specific thread for those. https://www.briskoda.net/forums/topic/491830-ngk-bkur5et-10-your-opinion-about-them/ No LPG.

I had a major problem with those spark plugs, take look https://www.briskoda.net/forums/topic/491830-ngk-bkur5et-10-your-opinion-about-them/ The 1st and the 2nd method are for professionals, don't try it by yourself The look of your piston's head match to those which Chris Fix has uploaded for Seafoam use. As i read you have neglected your car too much in some sectors and i wonder how you manage to drive in such a bad situation.

The tube socket (left and right) is vacuum but since they are at the bottom i wonder if we can use a long hose (like those on the A/C cleaning spray) to make the content of the spray to travel more inside the manifold. Here is an example:

We can clean the throttle body with spray (if we don't want to remove it) and the MAP sensor but can we go deeper with a spray? That hose entry on the bottom for what reason is? Can we spray there too? Has everyone ever use such ''foam" products? Or you think that the throttle cleaning is enough?

A question about the gap of spark plugs, i use Champion RC89PYC and supposed to have an 0.8mm gap Let's say it's wrong for example 0,9 or 1mm, can that cause any kind of problems at cold start but not after the car gets heated after few minutes? A small wrong gap like this is noticeable while driving at higher rpm or not?

''easy solution'' is the key word for those mechanics, the same phenomenon is with those which repair refrigerator ''let's change the board, the motor'' etc without to search for the cause. The most funny excuse was ''it's a old car, the engine has lot of tolerance that's why you have such a high fuel consumption in the morning'', the real reason was he didn't want to dedicate some time, he prefers better the ''buy new plug and play item-install it-pay me'' system.

For few years i had one on the driver column and some believed was for my turbo but one day cause me major problem with the brake pedal returning from a trip and guess what? the mechanic told me that the Vacuum servo has a problem and must be prepared for huge expenses but i had my doubts, i removed the gauge and the pipe which fed it from the fuel pressure regulator, i sealed the exit and yes, the problem vanished at once! The ECU-chip programmers advertise themselves that will ''liberate'' the car from such restrictions but many times they overdo it.

I envy those guys which have OBD2 port, connect a laptop and the co-driver can read almost anything on live data as the car rolling. I don't know if this can be done in a Felicia with old OBD port and i think devices like ScanGaugeII work with OBD2 only. As for the record: I asked from another programmer to check my car for the cold start high fuel consumption, he suggest me to buy a Wideband Air Fuel Ratio (AFR) gauge with his own Sensor, then drill the exhaust screw the new sensor and then to take the car to him to take measures, i said ''so i will have 2 Lambda sensors?" ,he said yes till he see if the exhaust fumes are OK and then maybe make the car work with the new Lambda and abolish the factory one. I told him that is an expensive job with a huge risk, if that won't work so what's the whole mess for? I haven't a supercar do add such an equipment and if the combination won't work then what's the reason to have such a gauge to my dashboard? This isn't a ''Need for Speed" car so i rejected the whole idea and fortunately i was right.

I have a relative anxiety if i will see something on the bottom of the reservoir.

Unfortunately i haven't that cup any more. When i pump the rest of the oil with the syringe i will keep it in a plastic bottle for further inspection.Maybe in the bottom of the reservoir the rest of the oil would be different but yes you are right does not look bad at first sight.

I was very disappointed when the 3 scanning tools found nothing. Unfortunately i haven't a friend with some kind of programme to watch the live data from the cold start till the car get warm to check for anything ''suspicious''. To be honest i was expecting from the ''Ecu-chipper'' to find it first, if i was not keeping detailed service notes and had not thinking for many nights the problem will existed till now, maybe not so obvious but there would be. For sure he made a cold start, why he didn't spotted to his laptop that the fuel consumption those crucial first minutes was higher than normal?

I took a sample of my Hydraulic Oil from the surface of the reservoir, it's not too dark (the back is shadow from my hand) but it isn't Green as the original. Nevertheless the days of it are numbered.

This is much better than the previous (disgrace) one. @nta16 : Many times told me ''it's the coolant sensor fault" (although the scanner tool didn't show anything) but no one thought to measure the coolant strength. If someone have done it and said ''hey it's too thick, this is for Siberia" would save me from many troubles. The most annoying thing here is from some repair-shop owners which saying ''Oh, your car is Chipped? Go, put the original and bring it back to check it" which in their mind is this task so easy as like ''take this aftermarket gasoline cap out and put the original".

\ Note: The above fuel consumption was in City traffic (mainly 1st-2nd gear and only for few seconds the 3rd) including the recently snow days with low temperatures. The "new" coolant plus the Amsoil additive helped me the most plus the ECU-chip update, the cold starts now have nothing to do with the previous ones. Many times other people criticise me for keeping detailed service notes but deep inside me i know that i am right. Those notes helped me to understand the nature of the problem and surprisingly no mechanic tested the coolant, everyone was watching the blue colour on the expanding reservoir and they were saying ''Hey, you are Ok, you have enough fluid" but no one spend 1 minute make a simple test. Another photo from that trip, it was very difficult to take good snapshots of fuel consumption with the right hand but you can see the needle which barely touches the 100 Km. The road was straight, even on slightly downhills the result can change dramatically but there is no meaning from me for such photos.

The previous coolant was the worst i have ever put in my car. As i have said in older posts the next day that i have started to ''dilute" it the TC-6 started to shown less Instant fuel consumption at cold start in the morning. The ECU-update was done 2 months after this trip. I have made a reset after the ''dilution'' process finished so since everything was fine the TC-6 started to shown results that brought the smile back to my face. I wrote at 13nth of January: This is a photo few minutes ago, yes i know it's a crappy but i was in a hurry. Fuel consumption 9,3 lt for 100,7 Km in the odometer.

I made the first cold start at Athens, drove for 5 Km till i reach the national road, i made a stop after 80 Km for coffee and rest, then a ''cold" start for another 7Οkm of mountain road till i reach my destination. The next day a cold start and 15 Km to a city near buy and return, another day the same but for other city. Final day a cold start from my village, 70 Km mountain road, a stop for coffee and rest and another ''cold" start for 80 Km on national road till i reach the boundaries of the municipality of Athens and 5 Km till home. The return was with light rain, i have some photos from TC-6 in Instant fuel consumption in national road from both days. Yes it did, based on TC-6, the behaviour of the car at first Km, the rise of the temperature, the smell of the fumes. No all these are gone.

Autumn, sun without air and around 10-13 'C Keep in mind was with previous too thick coolant which means for every cold start i was spending more fuel as it must. The trip was from Athens to my island, few visits in a city close by and return to Athens. City traffic in Athens, national road, mountain road, country roads inside a city, mountain road, national road, traffic back in Athens.