Technical Pulsating motor while idling+engine fault lamp on?

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Technical Pulsating motor while idling+engine fault lamp on?

Dicky71

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Hello out there. I changed the thermostat on the weekend because my temp gauge was behaving oddly. After filling the cooling system & bleeding it, i noticed that the engine was idling quite irratically. After a drive to get the engine up to working temp it idled better but not as it has done prior to the change. Btw, it's a 1,2 16v, 80hp. I have also just recently installed an engine block heater for sending the coolant around the engine & warming it up. I live in Sweden. Prior to installation, the engine was rattling a bit too much for my ears before it got warm, which it wasn't doing all that well. After installation i noticed that one of the hoses from the heater is a bit kinked, i.e. too long. I made a guess that the thermostat was showing signs of old age. I noticed that these engines have 2 lambda sonds. I disconnected them to get at the stat. Before re-connecting them i sprayed them with contact spray & vaseline spray for waterproofing. After all is said & done is there anybody out there that has the faintest idea why the engine lamp has come on & the idle has gone a bit astmatic, if you know what i mean?

Many kind regards to anyone who takes the time to answer with a plausible suggestion.

Best Wishes,
Richard Lees
Recently new to the world of Fiat & hoping i'm not going to be dissapointed
about it.(y)
 
Hello out there. I changed the thermostat on the weekend because my temp gauge was behaving oddly. After filling the cooling system & bleeding it, i noticed that the engine was idling quite irratically. After a drive to get the engine up to working temp it idled better but not as it has done prior to the change. Btw, it's a 1,2 16v, 80hp. I have also just recently installed an engine block heater for sending the coolant around the engine & warming it up. I live in Sweden. Prior to installation, the engine was rattling a bit too much for my ears before it got warm, which it wasn't doing all that well. After installation i noticed that one of the hoses from the heater is a bit kinked, i.e. too long. I made a guess that the thermostat was showing signs of old age. I noticed that these engines have 2 lambda sonds. I disconnected them to get at the stat. Before re-connecting them i sprayed them with contact spray & vaseline spray for waterproofing. After all is said & done is there anybody out there that has the faintest idea why the engine lamp has come on & the idle has gone a bit astmatic, if you know what i mean?

Many kind regards to anyone who takes the time to answer with a plausible suggestion.

Best Wishes,
Richard Lees
Recently new to the world of Fiat & hoping i'm not going to be dissapointed
about it.(y)

I am in Finland and have the same kind of engine coolant heater. Even when the engine is fully warmed up the temperature sensor requires the following flow route to be unrestricted so that the sensor gets well mixed coolant flowing over it.

1. Outwards thru the engine coolant sensor housing
2. Outwards along the pipe towards the rear bleed screw 'H' Fitting
3. Inwards via the hose on which you have fitted the heater
4. Back to the pump

So the only way the temperature sensor can get a good flow is when that kinked pipe is unrestricted.
 
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