Hi. My wifes fiat 500 1.2 8v engine became weird on idle....

Q: Hi. My wifes fiat 500 1.2 8v engine became weird on idle.

asked by on July 06, 2017

Hi. My wifes fiat 500 1.2 8v engine became weird on idle. When on idle with all electronic appliances OFF it idles fine. As soon as I turn heating or headlights or any other electronics idle messes up it sounds like its about to stall and back to normal at very precise every 3 seconds. More electrics on- more rattle. I have tested the battery and an alternator which appears to be fine. Parts replaced but no luck: solenoid valve, map sensor, spark plugs, spark leads, ignition coil, throttle body. Any ideas please?

My car has 54000 miles.

First you want to be sure there is no air getting into the engine without passing through the Mass Air Flow sensor (MAF) check for any leaks around hoses or rubber boots connecting to the intake. After that I begin to suspect that there is some crud buildup in the throttle body around the edged of the throttle when it is closed. This buildup can be removed using solvents and a clean cloth, but the procedure can be tricky because you can damage the throttle motor by manhandling the throttle. If you want help with this you can contact Your Mechanic. They will send a technician to your home or office to check out your Fiat’s Idling problem and let you know what it will take to solve it.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

2004 Mazda Tribubte shut off

This may be a sign of a failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine. This valve is controlled by the...

What does my car start shaking when idling 1997 Ford Taurus

Hello. This can be caused by a number of things. Most of the time the issue is caused from a vacuum leak in the engine or a failure in the idle control valve. This is only true if the issue...

Car revs up and won't rev down. Changed ICV

High idle problems are often times related to vacuum leaks or lean fuel conditions. I would start by checking for vacuum leaks and other fuel delivery components, such as the mass air flow sensor, injectors, throttle body, etc. High idle...

Related articles

How to Keep Your Car From Stalling
When When driving a car, we expect it to get us from point A to point B without any issues. It can become unnerving to drive if your car stalls randomly when coming to a stop, whether it is at...
Symptoms of a Bad or Failing Oxygen Sensor
Common signs of a faulty car oxygen sensor include the Check Engine Light coming on, bad gas mileage, and a rough idle.
How to Check an Idle Air Control Valve
Idle air control (IAC) valves regulate the engine idle speed. Engine idle speed is the revolution speed of the engine when the throttle is inactive.