Hi scotty I'm fed up with my car, actually with the service too. It is 2012 tiguan 1.4 TSI gasoline 122 hp. It doesn't start up easily on cold mornings unless I apply some gas pedal. In the service they changed sparking plugs, emptied the gasoline tank and cleaned all the things inside like fliters, changed and checked with a new heat sensor, and checked with other parts responsible for mixture of air and gas, motor compression rates and they found nothing. They will lastly check with the injectors to see if they leak gasoline even when the car is stopped. What do you think the problem is?
Another experience that confirms Scotty's opinion about VW's quality. There is one of his videos about that problem. I suggest you get rid of it. It didn't hold even 10 years without serious problems.
https://www.youtube.com/watch?v=064Ilsz8Fzg
Plus my problem only occurs in cold mornings so it is a problem with air but what
It could be the battery if they fixed everything. Otherwise, it's probably at the end of it's lifespan.
No battery is brand new 2020. These are the error codes I got with obd II device before I left it to service. Is there anything meaningful with this problem?
https://filebin.net/kl13upunxjo05648/metin.txt?t=hu0b73kz
If I had to make a guess, after confirming that the throttle body was clean and the sensors which the computer uses during open loop to adjust air/fuel mixture (engine coolant temperature (ECT) sensor, intake air temperature (IAT) sensor, mass air flow (MAF) sensor, manifold absolute pressure (MAP) sensor) were reporting reasonable values, I'd check for an intake manifold gasket vacuum leak.
In the cold, parts contract. Gasket leaks get bigger and failing intake manifold gaskets are notorious for causing "hard starts" or "no starts" on cold mornings. As the engine warms, or the temp rises during the day, parts expand again.
When you apply "gas pedal," the throttle plate opens and even though you're adding more air at least it's "reported airflow" by the MAF and the computer knows about it and adds more fuel. Perhaps not an ideal air/fuel mixture (with the gasket leak) for a cold start, but maybe just barely enough.
You aren't complaining about any other driveability issues except for the hard starting in the cold.
I wouldn't go throwing parts/services at it, which IF were defective, would cause driveability issues across all operating temperatures. (like a contaminated fuel tank or leaky injectors)
If you have an intake manifold gasket vacuum leak it won't disappear during warmer operating temps, it will just become less severe than it is in the cold and if you switch your ELM scanner to live data and observe your fuel trims, you may notice a positive fuel trim at idle which decreases as you increase RPMs up to around 2000+ which would point you to investigating for a vacuum leak
Do you mean stft or ltft? Which one should I check? And by the way some people say this is caused because of egr valve in vw. Does my car egr valve? Sorry for my illiteracy
These are my stft and ltft readings when idle. Are they normal?
Watch both. The LTFT will follow the STFT. The LTFT will just take a little longer to adjust because the computer uses STFT to determine LTFT percentages . (if you get a chance watch a youtube on Fuel Trim Basics)
Again, a faulty egr valve wouldn't just be an issue during a morning start on cold winter days and not during a morning start on warmer winter days.. You would be having hard starts and idling issues even in the summer.
Look for things that would be affected by the cold weather that's causing the issue.
You have a cold weather starting problem.
Look for things affected by cold
Man congratulations! They have found that intake manifold has been sooted. But I wonder this is gasoline powered car so is it still possible it can be sooted? And can I fix it myself? Because service wants like 1.500$ for it. I m adding the video service sent me today
What do you suggest to buy as replacement then?
What are you looking for? SUV?
Yes a suv with a larger trunk
For that size, you can buy a used Toyota Highlander
What about amarok or Lincoln navigator?
Lincoln Navigators are okay vehicles that can last around 150,000 miles before the electronics break down.
We don't have Volkswagen Amaroks in the US. I can tell you that the diesel engines are very long lasting than the gasoline engines
I hope that answers your question.
@alvin
Highlander is 7 seater, Tiguan is 5. RAV4 is in its size range.
Oh I thought you owned the Atlas lol.
I didn't get last joke if it was a joke lol 😁
He meant VW Atlas.