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

asked by on

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
  1. Home
  2. Questions
  3. Hi. My wifes fiat 500 1.2 8v engine became weird on idle.

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

Q: 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...

Q: My car always stuck in neutral I'm trying to put into drive still showing neutral, putting in R still showing N 2015 Fiat 500

Hi there - your Fiat "automatic" transmission is actually a 6-speed, dual-clutch manual transmission, with some rather sophisticated electronics and actuators attached to it. These boxes are notoriously complicated, with incredible complexity in the transmission controllers themselves. Your controller is...

Q: Inaccurate warnings from the computer

I don't know what the mileage is on your car, but it may still be under warranty. First thing I would do is call the dealer and find out. I wouldn't recommend trying to figure this out yourself because this...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.