Technical Fiat Panda 1.2 312pxa1a misfire

[Rodrigo1]

Hey guys!
Some time ago, when my car was going at high speeds 120km/h or higher than 3000rpm, it went into safe mode.
After that, I took the workshop, where we read the errors on the machine, and it was the following:
P0300
P0302
P0303
This in the first reading, I changed the candles, spark plug cables, coils, and crankshaft sensor. After a few more laps, it happened again in the same circumstances, only when I'm at a high speed. There I called again, and now I have the p0300 and the p0302, I would like to know your opinion. Is it the fuel injector? Lambda?
Attached I leave some real-time information, in idle 900rpm it has a short-term fuel adjustment of 28% and long-term -20%. The collector pressure is at 35kpa which seems normal to me, the butterfly position 15%, oxygen sensor 1 at 0.82V in which the short adjustment is 25% and the oxygen sensor 2 is at 0.1V. Hence my thought of the lambda.


Thanks!

 

[the green vanper]

Hello,

eLearn does not have documentation for misfiring in the Diagnosing section, but there are two I assume could be caused by misfiring:

Hope that it would be helpful.

 

[The Panda Nut]

I would suggest remove and clean the MAP sensor (side of the inlet manifold), remove and clean throttle body, clean out the inlet manifold through the top while the throttle body is off. large piece of clean cooton cloth and a piece of bendy wire / paper towel. This has worked for me on several occasions. I have catch tanks fittle on crankcase breathers and this seems to stop sludge in the manifold once and for all.

 

[the green vanper]

P0300
P0302
P0303

That looks to me like readings from a generic error codes reader. So, knowing we're speaking FIAT, can be not precise.

However I did some digging in eLearn and found those troubleshoting docs for the errors that start with the a.m. numbers.

 

[Rodrigo1]

That looks to me like readings from a generic error codes reader. So, knowing we're speaking FIAT, can be not precise.

However I did some digging in eLearn and found those troubleshoting docs for the errors that start with the a.m. numbers.

Thanks for your time! This is like step by step?

 

[Rodrigo1]

I would suggest remove and clean the MAP sensor (side of the inlet manifold), remove and clean throttle body, clean out the inlet manifold through the top while the throttle body is off. large piece of clean cooton cloth and a piece of bendy wire / paper towel. This has worked for me on several occasions. I have catch tanks fittle on crankcase breathers and this seems to stop sludge in the manifold once and for all.

I Will try clean, but my sensation is sonda lambda or injector