I own Skoda octavia 2001 2.0. since last month, engine keeps stalling:
- while driving (for 10km or sometimes for 1 - 2 km in distance).
- keeping the car idle for 20 - 35 minutes.
and when it stalls, It cranks but does not fire-up. unless, waiting for 10 - 15 minutes, or push-start it.
special cases:
when I am driving (over 60km in speed), I feel like the engine is holding back and loosing power or about to stall. As soon as I accelerate, it powers back (or lets say looks like gaining power to run again) and runs smoothly. This happens, in couple of seconds (like 1 - 2 seconds.). If I don't accelerate, engine goes off, but I can push-start it if I kept the speed over 40 km.
sometime I drive for 4 hours without having this issue (this is rare other than having the engine stalling twice everyday).
Things I have done so far:
- I have changed the battery since it was kinda old.
- got the car scanned (no issues or fault were found).
- checked if the car still runs while the battery is unplugged (checking if the problem from the alternator).
- Replaced the fuel filter.
note:
This happens since I changed the engine oil type to ( 20w50 ), while the car type is (5w30) but I have been told that the oil type won't cause this issue to happen.
When the car stalls or about to stall, I hear clicking noise from the relay box under the dash. I checked the relays by just touching and found two of them were too hot compared to the others (which were kida cool).
Edit:
Forgot to mention a couple of things:
I started to get the immobilise light before the car start stalling, but now I get the lgiht a lot lately (like 85% everytime I want to start the car). So all I have to do is switch off then back on for the light (warning) to disappear and be able to start the car. But I don't get the immobilise light when the car stalls or shut-off.
When I force start the car when it's about to stall at low speed or trying to push-start it, I get the oil warning light and the car stalls (this happened to me sometimes).
The car looks like to give me more driving time at cold weather. for example: at the morning (weather degree between 17 - 19 C)I can drive for more than 11 km (in distance (depends on weather)) then it stalls, but I can fire the car up after less than 5 minutes. But afternoon(as its hot 25 - 28 C), it drives me less than 9 or 10 km (in distance) and I won't be able to fire it up unless after 10 minutes of wait at-less.
When I try to fire-up the car after stalling, I hear a crazy clicking from the relay box.
Edite: Scanned the car again and got the error code: 17978 (Engine Start Blocked by Immobilizer).
