Technical Fiat punto 2011 evo no spark on cylinder 4

[RSAFIATCPT]

Hi guys I have a problem with my fiat punto
350a1 1.4 8v as I changed the coil pack before checking the values on the coils the problem still remained

Problem

Cylinder number 4 not firing coil number 4 not going on

I checked all resistance on my coils and they all ready 0.05 ohms

New spark plugs new spark plug wires



Anyone know what the problem might be
coz at this point i think it might be the coil driver on the ecu it self

I didn't run a obd read on it yet

 

[GrandePunto PL]

1a. Test the spark using FES or MES software (there is a coil test option).
1b. Do a real Diagnostics = oscilloscope (watch the ignition/spark waveform).
2. It's not a spark but fuel issue (injector).
3. Mechanical problem (valves, timing, head gasket).
4. ECU failure (it happens, most of the time it's fuel/spark "driver" related).

 

[RSAFIATCPT]

1a. Test the spark using FES or MES software (there is a coil test option).
1b. Do a real Diagnostics = oscilloscope (watch the ignition/spark waveform).
2. It's not a spark but fuel issue (injector).
3. Mechanical problem (valves, timing, head gasket).
4. ECU failure (it happens, most of the time it's fuel/spark "driver" related).

Thanx bud il do some tests

 

[varesecrazy]

Thanx bud il do some tests

Making any progress

 

[RSAFIATCPT]

Making any progress

Yes budy there's 4 ignition coil drivers on the ecu labeled (Vb525sp) on of them connected to pin 1 is dead so I've ordered it having to wait 30 days as no were in South africa has them

Those drivers are responsible for spark and fuel on that cylinder

 

[RSAFIATCPT]

So I found the exact same problem on the net

 

[varesecrazy]

Yes budy there's 4 ignition coil drivers on the ecu labeled (Vb525sp) on of them connected to pin 1 is dead so I've ordered it having to wait 30 days as no were in South africa has them

Those drivers are responsible for spark and fuel on that cylinder

Did you get it back to running OK?

 

[RSAFIATCPT]

Did you get it back to running OK?

Not yet waiting on ali express for the L9131 CHIP BUT the vb525sp

Did you get it back to running OK?

Not yet waiting on ali express for the L9131 chip but vb525sp had been replaced there's spark on all 4 cylinders but I still need to replace the L9131 coz I put to much heat on the chip n killed it

 

[AndyRKett]

you'll have to update us once you've done it to let us know if it resolves the problem.

If it does consider then doing a how to on this site as its something that could really help someone else suffering the same problem.

 

[RSAFIATCPT]

Thanx I will definitely update on here as soon as I get the L9131 chip

 

[RSAFIATCPT]

Update I have received the L9131 chips so I will take it to a professional and have him solder it and see if it works

Wish me luck

 

[varesecrazy]

BonChance

 

[RSAFIATCPT]

So update I replaced the chip checked all the pins and ecu still doesn't pick up after a few tries I went to look at the chip again and saw that a few of the pins of the chip has turned copper so my ecu killed it