Engine over revs at initial start up without touch accelerator. Shut down and restart, sometimes problems goes away.

run a scanner on the system to determine codes to diagnos problem

hi patricia
FIAT engine light flashing means the ECU needs adaptation,
you can do it yourself just follow this procedure.
( remember not to accelerate unles is stated) start the engine
let it to warm and wait for the cooling fan to come ON then OFF 3 times, like ON,OFF,ON,OFF,ON,OFF. After the fan cuts off the third time accelerate fully down let the engine rev up to 4000 only then leave the accelerator let the engine goes down back to idle, do this 3 times.the engine light should go away.
good luck

sound like your throttle positioning sensor or even yhe throttle it self it is electronic as far as i know the tiny metal bands come of and if the reading from the pedal sensor is incorect fuel shut of wil ocure

If the throttle cable is not attached properly to the throttle body or you have a bad motor mount, the throttle cable may be pulling the throttle open as you shift into gear. Open the hood, find the throttle cable on the throttle body. Inspect how it is connected and also how the cable is fastened in the engine comoartnent. Next, watch what happens as someone else starts the truck and puts it into gear. If the engine shifts significantly, check for broken motor mounts. If the throttle cable is misbehaving, correct the installation.

possible plugged injectors or might be electrical when was you car tuned up last

could have worn key or faulty ignition switch try another ignition key.if key worn out immobilizer and ecm can read key code.the theft control system will shut down fuel system.

could possibly be the tps,or the isc,have someone check both.thats's throttle postion sensor and idle speed sensor.






Tim.............

That sounds like the the temperture sensor. that is what works the revs when the car is cold, is should be at the front of the engine. hope that helps

make sure your battery posts are screwed tightly

Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake