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Ignition problem Fiat Seicento twin coil electronic system currently running 2/4 cylinders plugs /leads coils proven ok Input to 1 coil when removed, does not affect engine running. however, when connected, this coil sparks but does not fire engine. swapping coils proved both coils to be working. Thus proving an input LT fault please advise where the input supply to the coil is supplied from? Regards Kevin

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  • Fiat Master
  • 76,118 Answers

The coil is grounded by the PCM

Posted on Jul 18, 2017

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SOURCE: overheating

hi check your thermostat, waterpump, radiator and cap, hoses, fan if you can see a visible leak then i can talk you through a solution if its not leaking try flushing radiator, change the cap, make sure your fan is working, make sure your water pump is working u can test by removing the radiator cap with the engine running you should be able to see the coolant flowing not just sitting still if you need more assistance let me know

Posted on Jun 04, 2008

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SOURCE: 2001 hyundai santa fe 6

HI......
OK. just follow the number on the ignition coils.
And the number on the cylinders are.
The FIREWALL side are 1,3,5, Starting from the belts location.
The RADIATOR side are 2,4,6, Starting from the belts location.
The coil with number 1 go to cylinder 1. as the same way the rest of the coils and cylinders.

OK... I hope this solve your question .

THank you for use fixya.

Posted on Jul 25, 2008

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SOURCE: restarting pajero

Hi James Just wondering if you got that troublesome beast running yet if not
drop me an email and ill help get you going again .

Posted on Oct 26, 2008

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SOURCE: fiat seicento

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

Posted on Dec 09, 2008

  • 1861 Answers

SOURCE: check engine light is on the code was po300

I respectfully disagree.
A P-0300 will NOT be set in a Corolla by a dirty fuel filter.
Replacing the fuel filter could be a very costly operation, as I have observed that the fuel line threads that connect to the fuel filter easuily get damaged when removing the fuel filter.

In short, don't replace the filter until you are SURE that it is the culpit.
In this case, the fuel filter is NOT the culprit..
Save your money; and your time.
Additionally, premium fuel does not clean fuel injectors. That expense would be a waste of money. The engine will actually run WORSE on premium fuel; the engine is NOT designed to run on premium. 87 or 89 (better choice/89) is the grade to use.

If you really want to track down the P-0300 code, which is a multiple/random cylinder misfire, I would look at the quality of the fuel in the car; ie water in the gas. Second, I would remove the plugs and examine them closely. A worn center electrode will also set the P-0300 code, as will bad/weak plug wires (over 5 years old).

Please feel free to contact me back if you need further assistance. Thanks for choosing FixYa for assistance.

Posted on Mar 05, 2009

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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

Were do the ht leads go on fiat 1 2mpi


Technical: HT Leads diagram? - The FIAT Forum

www.fiatforum.com > FIAT Cars > Cinquecento / Seicento
Aug 30, 2008 - 9 posts - ‎3 authors Anyone got a simple diagram of where each lead goes from each plug to which ... Makesure the HT leads are on correct, then try them either way. ... As long as 1+4 spark plugs go to one coil pack, then 2+3 go to the other coil ... Fuel light flashing but won't start (No spark)
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Dec 01, 2015 | Fiat Cars & Trucks

1 Answer

Fiat Palio 1.2 firing order


didnt change them 1 by one, you bad boy.

id get the real engine name and google that or buy the FSM book.
at FIAT.

1.2 F.I.R.E engine.
comes in 2 favors
  • 8v SMPI VVT (2007 - current)
  • 16v SMPI (1998 - 2009)
most non boxer engines, are 1,3,4,2 (but this is pcm job not you )
google shows
IT'S WASTED SPARK SYSTEM !
google hit #1
It's cast into the cylinder head. Look across from the passenger side of the car- you'll see 2314 just above the coils.

sounds like this engine is with a COIL pack, You never said.
and with a twin pack , all 4 bangers are wasted spark.
so 2nd 3 fire on one coil (in series) and 1and 4 fire in tandom.
but the PCM sets order. not you,
it only needs to have to pack wired right.
and is clearly marked on most better made coil packs
did you look first.?

---------------------------------------------------------------------------
one more google poster , no FSM. shows
coil towards the front of the car is cylinder 2 and 3
coil towards the back of the car cylinder 1 and 4
as shown below

make sure you have the plugs to the coils the right way round thou i

4 ----[o]4
1 ----------------[o]1
2 ------------[o]2
3 --------[o]3

-----------------------------------------------------------------
me.....
when the PCM fires coil 1/4 , it better be wired to 1 and4 or
it will not run. (ir shakes like a wet dog)
simple as can be.

yes, the front cylinder is #1
now where is front. you say?, that be, on the crank pulley end.
not the clutch.side.

if still confused a drawing is easy to make.
1sparkfront, to 1 coil
2 spark to coil 2
3 spark to coil 3
4 spark to coil 4. rear cylinder is 4.
1,2,3,4 front to rear.

Jul 15, 2014 | 2008 Fiat Palio 1.2

1 Answer

Fiat palio ignition timing


its marked on the coil
and on the valve cover
its a wasted spark system.
the coil is marked (if not sub coil)
2314

1 goes to 1 front cylinder spark.
2 goes to 2.
3 to 3
4 to 4 rear spark.
the ecu knows the order but the wires MUST be right.
#1 spark is closest to front engine pulley, (belt side)
#4 is rear.

Jul 15, 2014 | 2005 Fiat Palio

2 Answers

No spark at cylinders 1&4


Considering the whole system runs with a common crank sensor, the first place I would test would have also been the coil. If these have been tested and are ok, I would start looking at the ecu. The signal to the coil is generated by the ecu and unless there is a break in wiring, it is more than likely the problem.

If you have access to a wiring diagram, check for the coil trigger signal from the ecu. If this is present at the ecu, problem is wiring. If no signal at ecu then that's your problem.

Keep in mind that cyl 1&4 and 2&3 fire together off common coils in the coil pack so the fact that those cylinders are faulty together, also leads to ecu.

I know the fiat's have a history of problems with ecu- especially if the vehicles are valet'd and the engine pressure cleaned.

Please give us feedback regarding what you find- hope I led u in the right direction!

Apr 09, 2013 | 2001 Fiat Punto

1 Answer

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


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.

Jan 15, 2013 | 1998 Fiat Seicento S

2 Answers

Fireing order for a 1987 oldsmobile delta 88


2 different 3.8's for that. Will send other picture as well, you pick what you have.c50fb60.jpg

Jul 02, 2009 | 1988 Oldsmobile Delta 88

1 Answer

Timing the cams and crank with a belt


  1. Note: Electronic Ignition engine timing is entirely controlled by the PCM. Electronic Ignition engine timing is NOT adjustable. Do not attempt to check base timing. You will receive false readings.

The CKP sensor is used to indicate crankshaft position and speed by sensing a missing tooth on a pulse wheel mounted to the crankshaft. The CMP sensor is used by the COP Integrated EI System to identify top dead center of compression of cylinder 1 to synchronize the firing of the individual coils.
  1. The PCM uses the CKP signal to calculate a spark target and then fires the coil pack(s) to that target shown in Figure 51. The PCM uses the CMP sensor not shown in Figure 51 on COP Integrated EI Systems to identify top dead center of compression of cylinder 1 to synchronize the firing of the individual coils.
  1. The coils and coil packs receive their signal from the PCM to fire at a calculated spark target. Each coil within the pack fires two spark plugs at the same time. The plugs are paired so that as one fires during the compression stroke the other fires during the exhaust stroke. The next time the coil is fired the situation is reversed. The COP system fires only one spark plug per coil and only on the compression stroke.

    The PCM acts as an electronic switch to ground in the coil primary circuit. When the switch is closed, battery positive voltage (B+) applied to the coil primary circuit builds a magnetic field around the primary coil. When the switch opens, the power is interrupted and the primary field collapses inducing the high voltage in the secondary coil windings and the spark plug is fired. A kickback voltage spike occurs when the primary field collapses. The PCM uses this voltage spike to generate an Ignition Diagnostic Monitor (IDM) signal. IDM communicates information by pulsewidth modulation in the PCM.
  1. The PCM processes the CKP signal and uses it to drive the tachometer as the Clean Tach Out (CTO) signal.

2.5L V6

The ignition system consists of an ignition coil, spark plug wires and spark plugs.
The crankshaft position sensor signal is the basis for ignition timing calculations. The alternating voltage signal from the crankshaft position sensor is digitized by a pulse former within the powertrain control module. This digitized signal is then used to position the closing time of the primary circuit of the ignition coil.
Ignition timing is determined by the powertrain control module in response to engine operating conditions based on stored data tables or maps. Once ignition timing has been determined, the powertrain control module interrupts the current to the primary circuit of the ignition coil thus triggering the ignition spark which is supplied to the cylinders through the spark plug wires and spark plugs.
The ignition coils are triggered by the powertrain control module in pairs (cylinders 1 and 5, cylinders 4 and 3 and cylinders 2 and 6) sending one ignition spark to the firing cylinder and one ignition spark to the corresponding cylinder on the exhaust stroke. This ensures that any unburnt fuel residues remaining in the cylinder on the exhaust stroke are re - ignited to provide cleaner exhaust emissions.
---------------------------------------------------------------
2.0L 4 cynder

The ignition system consists of an ignition coil, spark plug wires and spark plugs.
The crankshaft position sensor signal is the basis for ignition timing calculations. The alternating voltage signal from the crankshaft position sensor is digitized by the powertrain control module. This digitized signal is then used to position the closing time of the primary circuit of the ignition coil.
Ignition angle is determined by the powertrain control module in response to engine operating conditions. Once ignition angle has been determined, the powertrain control module interrupts the current to the primary circuit of the ignition coil thus triggering the ignition spark which is supplied to the cylinders through the spark plug wires and spark plugs.
The ignition coils are triggered by the powertrain control module in pairs (cylinders 1 and 4 and cylinders 3 and 2) sending one ignition spark to the firing cylinder and one ignition spark to the corresponding cylinder on the exhaust stroke. This make sures that any unburnt fuel residues remaining in the cylinder on the exhaust stroke are re - ignited to provide cleaner exhaust emissions.
------------------------------------------------------------------------------------
Integrated Electronic Ignition System The Integrated Electronic Ignition (EI) System consists of a crankshaft position (CKP) sensor, coil pack(s), connecting wiring, and PCM. The Coil On Plug (COP) Integrated EI System uses a separate coil for each spark plug and each coil is mounted directly onto the plug. The COP Integrated EI System eliminates the need for spark plug wires but does require input from the camshaft position (CMP) sensor.
----------------------------------------------------------------------------------------

Apr 05, 2009 | 1998 Ford Contour

2 Answers

1990 Subaru Legacy shorted out the ignition coil. I replaced it and in less than 1 mile,it shorted out the new one.


Subaru engines (including Legacy and engines of many other automobiles, GM, etc.) have returned to so-called wasted spark ignition systems since advent of the electronic distributor-less ignition (having been used historically in early engines with magneto ignitions). With this approach, the ignition systems are less expensive and usually quite reliable. At the same time, however, a shorted spark plug (cracked or carbon clogged, etc.) (or bad ignition spark plug wire) grounds both the ignition spark and the false spark being used. This means that it also grounds the corresponding respective ignition spark of the other 180 degree out of phase cylinder (that uses the same the same coil because the spark current is connected to the spark plugs of two cylinders). Since such a defect allows more current to flow in the spark coil to two plugs when the resistance of the spark plug gap disappears due to a cracked plug, etc, it seems likely to hasten coil burn out if the spark plug/plug wire defect is not corrected before installing the new spark coil.

To explain further, wasted spark means that when a cylinder is ready to fire, it gets a spark to its spark plug while part of the spark (from the same coil and current) as a sort of copy is also sent to another cyclinder at the same time but when the piston in that cylinder is exhausting its ignited gases 180 degrees out of phase from when its spark is needed. When the second cylinder is ready to fire and receives its "spark, the first cyclinder the also receivesa "wasted" spark "copy" of the one needed by the second cylinder. Economy is achieved in manufacture because otherwise electronics would have to turn on and off four different spark coils to distribute four different sparks as needed to the four cylinders. With wasted sparks (which are cheap), because the spark current of one coil is connected (internally in the ignition coil unit) to two cylinders that are in the same position but 180 degrees out of phase in firing, the system can turn on and off two spark coils twice as fast with half the electronics and fire two cylinders that are 180 degrees out of phase. A four cylinder engine thus uses only two coils, a six cylinder engine, three coils, etc., in a wasted spark system.

Jul 27, 2008 | Subaru Legacy Cars & Trucks

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