Question about 1998 Fiat Seicento S

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My seicento is only running on 2 cylinders what problems would this cause

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If your Fiat has no distributor, a distributorless ignition system, then it will have a coil pack with two coils. Each coil provides spark for two cylinders. One coil is for cylinders 1 and 4, and the other coil is for cylinders 2 and 3. If one of your coils has quit working, you will only be running on 2 cylinders. It is not uncommon for coils to fail.

Posted on Jan 15, 2013

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Posted on Jan 02, 2017

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Fiat seicento sx 2001 mil light comes on intermittently.code reader gives error p0300 but car seems fine. What could be wrong


code p 0300 refers to random/multiple cylinder misfires detected==causes spark plug/s ---HT lead/s--injector/s--ignition coil/s-low compression --- wiring
it could be simple moisture in the distributor cap, wiring connections
It could be a problem ECM unit
monitor the condition or take it to an accredited service center that has experience on your make of vehicle and have it checked out
could be a problem that has already been identified and has a manufacturer service bulletin in place

Sep 01, 2016 | Fiat Seicento Cars & Trucks

1 Answer

Cylinder


It takes all 4 ingredients to fire a cylinder - Air, Fuel, Spark, and Timing. If you only have one cylinder misfiring, it should be a relatively easy diagnosis and fix. You dont mention which cylinder, so I will pick one - #2. Let's start with Spark. First, remove the spark plug in #2 cylinder. Examine the threaded end. Is it wet and/or smell like fuel? If so, chances are the misfire is caused by a weak/absent spark. To confirm, swap it with a known good cylinder - example #3 cylinder. Start it and let it run for a couple of minutes. If cylinder #3 misfires, then you have found the culprit - bad spark plug. If the misfire didn't move - still on Cylinder #2, then swap out the spark plug wire (both ends). Start and run for a couple of minutes. Again, if it appears on Cylinder #3 - the plug wire is the culprit. If the cylinder #2 is still misfiring, get a new distributor and rotor cap - one of those is your problem.
Now, when you first pulled the plug from Cylinder #2, if it wasn't wet or smelled of fuel, chances are Spark is not the issue. Was the plug dry and/or ashy? Possible cause is no fuel reaching the combustion chamber (cylinder). Using an automotive stethoscope, listen to the fuel injector for cylinder #2 while the motor is running. Should hear a regular and rhythmic ticking sound. Like a fast clock. (Use a long handled screwdriver touching one end to your ear and the other to the top of the injector if you dont have a stethoscope). No clicking or irregular clicking means fuel injector is not working (no sound) or is not working properly. Like searching for the Spark problem, swap the injector in #2 cylinder with #3. Start and run. If the problem moved to #3, that injector is the culprit. If it stayed on #2, it is likely your wiring to that injector - check the whole harness for loose connections or swelled with oil wires/connectors. Keep pecking away at the fuel delivery system for that cylinder. Stay looking for things that affect only that cylinder.
When you pulled the plug, was it fairly normal looking? Then this misfire code might only be a timing problem. It is likely not a timing problem in your case, because timing affects all cylinders, but I thought I would just mention it since Timing is an important part of combustion. Also, if timing were a culprit here, another symptom would usually appear signifying the Camshaft Positon Sensor or Crankshaft Position Sensor was/is failed, or it is possible for the timing belt/chain to skip a knurl on a sproket and throw the timing off, but like I said, it would almost always cause multiple/random misfires or a no-start/no-run symptom.
And finally, when you pulled the plug earlier, if it was an oily sticky mess, then the culprit might be Air - or compression/lack of compression. Lets hope not, because when Air is the cause of a misfire, it is usually an expensive fix. Need to perform a compression test. If you have little or no compression in the cylinder, it is likely a bad head gasket or a stuck/sticky/broken/chipped valve (exhaust or intake). Any of these things are bad news and expensive to fix in a shop. Also bad news and time consuming and difficult task for a shade tree mechanic.
Here is a chart of pictures of various spark plug conditions. It can help diagnose all kinds of troubles in engines. Good luck!
edc57e39-c387-44d7-a59f-d5affdb7d7d0.jpg

Apr 22, 2014 | 1980 Mercedes-Benz 280 SLC

1 Answer

Fiat seicento


The transmission needs work, possibly an overhaul.

Dec 03, 2013 | Cars & Trucks

1 Answer

Fiat seicento 2000 reg keeps overheating after going 5 or so miles, light comes on then grumbling and water from expansion tank. had new radiator switch put on, took fan off and tested-works ok- but not...


This may be a puzzle...
The seicento (I drive the same car) likes to create problems in the heater section of the cooling system. The small pipes to it (behind the carburator) may be blocked or the entire heater may simply be dirty. Flushing the system with a water hose may help. Usually this problem starts slowly and goes away if you re-start the engine and then excellerate a few times. Check if your heater blows hot air - if yes, and if he keeps blowing hot air (does not cool down and get cold) ther is no blockage. If you have a blockage, your heater will only blow hot for a little while and then comes normal cool air - if this is the case, you have a blockage right in your heating system which runs your cooling system hot and the cap of your cooling tank will start leaking. This is a comon problem on older Seicentos....
Other general problems can also be the case, like defective thermostat, fan motor does not come on (check fuse and relais first).
In some cases, ther might be some air trapped in the cooling system and doing the above will also cure it. At last, check if your water pump is working.
Regards
Herbert

Sep 24, 2010 | 2006 Fiat Pininfarina

2 Answers

Fiat seicento cigarette lighter not working


check fuses first, if all fuses ok then u have bad cig lighter.

Oct 22, 2009 | 2006 Fiat X1/9

1 Answer

Seems like its only running on 2 cylinders when it


you have distributor problems........replace it

Jun 30, 2009 | 1992 Honda Accord

2 Answers

Fiat seicento


it could be a possibility that it has a faulty rpm sensor have been known to go.

Dec 04, 2008 | 2006 Fiat 124

4 Answers

Fiat


I have a seicento sporting myself. No major issues but sump gasket needs replacement every two to three years, water pump very fragile and requires regular replacement of cooling water as per maintenance schedule, otherwise problems are guaranteed. Similarly for heater blower using hot cooling water. Radiator is a hassle to replace. However overall it is a fun car to drive.

Jul 05, 2008 | Fiat 124 Cars & Trucks

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