Hello everyone)
This time the problem wasn't solved, and I would like to hear your thoughts
For half a year now, the fuel level sensor behaves erratically right after startup. I know there are about 15 liters in the tank, but when I start my car after a night's sleep, it shows full. Then around 15 minutes later, it starts showing real values and gradually decreases.
At first this didn't bother me much, but two weeks ago a new problem occurred. The temperature sensor next to it started behaving similarly.
Once I started the engine cold, waited for a bit, then drove off. Temperature climbed up as usual. Fuel gauge showed more than usual (this has become normal). Then I noticed this situation
Of course, I stopped immediately, checked, the engine runs perfectly, temperature feels right, nothing boils. Hmm, what can I do? Continued driving and observed. The needle gradually dropped to normal levels and didn't rise for the rest of the day. Importantly, once the temperature stabilized, so did the fuel level. They malfunction in sync.
And so for several days. In the morning it 'boils', then everything works well. First thing I decided to replace was the thermostat. The temperature sensor is on the block, theoretically if the thermostat doesn't open (or opens poorly), the small circuit boils. Then with pressure, it finally opens and the temperature drops. This was an easy theory to test; both hoses were at working temperatures.
I chose a cheap but well-reviewed thermostat. Before this, I had one like this, pink in color, and there were no problems
Removed the old one
It wasn't that bad actually, it could have lasted longer. But since we're replacing parts now, it needs to be changed
Very important detail: the thermostat has a mounting position. When you install it, it should sit flush with the surface.
And then put on the gasket and cover
Incidentally, cutting the gasket from parafin paper is quite simple; took no more than 2 minutes)
If you place the gasket first and then the thermostat, or if the thermostat doesn't fit into its position, there's a 99.9% chance you'll break the thermostat cover. It takes a long time to find it, new ones cost $45 and take a month to arrive, while used ones may not be available.
In summary, I put everything back together
I still haven't washed the engine after replacing the old steering pump that dirtied the entire engine bay(
In the end, nothing changed. The thermostat wasn't the issue, so temperatures must be normal, and the problem lies with the sensor, wiring or instrument cluster. Probably will start by changing the instruments first; if they lie in unison, it might be a common fault.
What are your ideas? What could this be?
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