Technical OBD code p0351

[punto guy]

Hi I have a 2003 fiat punto active sport I bought the car with the engine check light on when I start the car up it Judders a little and sounds like it's going to cut out before picking up to 1000 rpm I had the car plugged into obd2 and the code p0351 so I replaced both coil packs however when I replaced the back one the car began to misfire so I thought maybe the new coil pack was broke so took it back for a new one but it done the same thing so I put the old coil back on and the car went back to the way it was running fine but Judders abit when started has anyone had this problem as it makes no sense to me how or why I could replace both coil packs just for the car to sound worse when the back coil is replaced id be very grateful for any help driving me nuts

 

[flisko]

p0351 is coil 1, well you can try replacing ht leads and spark plugs
when you cleared errors, did same error came on again?

 

[varesecrazy]

Hi I have a 2003 fiat punto active sport I bought the car with the engine check light on when I start the car up it Judders a little and sounds like it's going to cut out before picking up to 1000 rpm I had the car plugged into obd2 and the code p0351 so I replaced both coil packs however when I replaced the back one the car began to misfire so I thought maybe the new coil pack was broke so took it back for a new one but it done the same thing so I put the old coil back on and the car went back to the way it was running fine but Judders abit when started has anyone had this problem as it makes no sense to me how or why I could replace both coil packs just for the car to sound worse when the back coil is replaced id be very grateful for any help driving me nuts

I'd check wiring and clean the earth points before buying more parts.

 

[jazz452]

Got an ECU felling about this 1.

 

[punto guy]

I have changed plugs and leads made no difference it's a strange one as soon as I put the new coil on the back one the car sounds worse till I put the old coil back then it runs OK again still Judders when I first start the car before picking back up to normal rpm

 

[jazz452]

So what the the fault actually say, something like weak signal? as stated above clean earths and feeds to coils.

 

[punto guy]

The code reads ignition coil A primary \ secondary circuit

 

[jazz452]

It should say a bit more than that, still got an ECU feeling hopefully i'm wrong, are u using MES or a really basic code reader. Still the ECU is no longer an expensive job.

 

[punto guy]

Hi jazz it's just a basic code reader iv got a new ECU coming from flebay so hopefully that sorts it

 

[jazz452]

So you got the past number and virgin ECU?

 

[punto guy]

Yeah just waiting on it coming hope it sorts whatever the problem is well here's hoping

 

[punto guy]

Past number??

 

[jazz452]

Part number. Was it the most expensive 1 like mine? Hopefully u didn't jump the gun ordering although I think you can return it at aslight cost.