Question about 2003 Fiat Siena

2 Answers

When i start my fiat it idles irregular and sluggidh pull away

The idle of my fiat is low. It has a flat spot when I lull away, however fine when i drive

Posted by eric van Dieman on

  • Randy Prevost
    Randy Prevost Oct 10, 2012

    Hi,Please explain what you mean by "irregular". Have you tried adjusting the idle?

×

Ad

2 Answers

Marvin

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Fiat Master
  • 85,239 Answers

The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems.


Posted on Oct 10, 2012

Ad

ivan whisker

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Fiat Master
  • 1,164 Answers

I had a fiat punto that did this is it over heating as well if it is it has a colant air block sounds stupid but i have known and put wright at least a dozen of these and are all still running fine if not iregular idles are caused by faulty plugs faulty coil packs leaking hoses to carbs or injector could be faulty leads if you check the above im sure one of them will solve it cheers ivan

Posted on Oct 10, 2012

Ad

4 Related Answers

Anonymous

  • 458 Answers

SOURCE: uno,power

Sounds like you got some bad gas. I would either try an additive to remove water and some octane boost. If that doesn't work you will need to drain the tank. This has been a real problem with the price of gas going up. Some stations in my area have been shut down for putting water in the gas. If it was running fine before you got gas, then more than likely this is your problem.

Rtae this as a Fixya if this solves your problem. Ask more questions if you need to.

Posted on Jun 16, 2008

alicantecoli

Colin Stickland

  • 22485 Answers

SOURCE: fiat palio 16v stalls all the time when started,

a valve on the inlet manifold but what one without seeing it ?? honestly do not know ,check for a split or perished vacumn hose first though

Posted on Mar 08, 2010

Testimonial: "cam belt broke a month or 2 ago and 8 valves where replaced!"

c1apton15

Mical Caterina

  • 3400 Answers

SOURCE: Fiat punto 02 reg 1.2

I'd start with replacing fuel filter and running a good fuel system cleaner through it with next tankfull

Posted on Mar 10, 2011

Fixya

  • 142 Answers

SOURCE: my fiat idles but wont rev

That maybe what the rev limiter is set for.That way you can not over rev causing engine damage.

Posted on Sep 11, 2012

Add Your Answer

×

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Fiat ducato engine management light


You need to run a fault code test, anytime this light is on a fault code is stored.

Jun 19, 2016 | Fiat Cars & Trucks

1 Answer

Fiat problems


code p0402 refers to exhaust gas recirculation (EGR) system--excessive flow detected===causes--hose blockage/leak--basic setting not carried ouit(if applicable) wiring--EGR valve--EGR solenoid ---ECM
replace the valve and solenoid.

Aug 12, 2014 | Cars & Trucks

1 Answer

My 1993 olds cutlass supreme idles fine until you step on the gas or when your going down the road at higher speeds than idle it has a hesitation what's the problem?


A flat spot on acceleration could be low fuel pressure or a faulty throttle position sensor. Could also be a vac leak such as a faulty EGR valve.
Is the check engine light on ?

Mar 06, 2014 | 1993 Oldsmobile Cutlass Supreme

1 Answer

My fiat punto loses power when driving uphill


I have a 98 punto sporting nd today it started running like it was misfiring but wen i accelerate slow its fine but wen u accelerate as normal it spits and splutters :'( any suggestions??i have change fuel filter nd injectors ????

Sep 22, 2012 | 2005 Fiat Punto 1.2

1 Answer

Idling Problem/Flatspot


2006 model?? dealer only encrypted software ,my advice is if it runs ok when driving normal then leave well alone ,this flat spot could be present to allow for something in the normal running ie tuning to keep the economy up ??

Mar 19, 2010 | 2007 BMW 328xi Sports Wagon

2 Answers

When i turn on the A/C my f150 will not idle. At traveling speed, runs fine. Stop at red light, truck dies


Here is the common cause 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

Jun 26, 2009 | 1999 Ford F150 Regular Cab

1 Answer

How do u set the carb on a 86 mazda sl auto


the flat spot and hard starting is caused from a faulty accelrator pump or a blocked discharge jet in the pump circuit i would be putting a kit in the carby to improve mpg

the only adjustments on the carby is idle speed and idle mixture which dont affect cars mpg

Dec 29, 2008 | 1987 Mazda 323 4-Door

Not finding what you are looking for?
2003 Fiat Siena Logo

339 people viewed this question

Ask a Question

Usually answered in minutes!

Top Fiat Experts

Marvin
Marvin

Level 3 Expert

85239 Answers

Gustavo Ortiz
Gustavo Ortiz

Level 3 Expert

637 Answers

Brad Brown

Level 3 Expert

18562 Answers

Are you a Fiat Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...