Need help to solve missfire, rough idle on my Peugeot RCZ 2011 1.6 THP200

[estmiracle]

Hello guys, I have an issue with a Peugeot RCZ 2011 1.6 THP200.

Long story short, car went into limp mode upon hard acceleration, started to missfire.
Next day cleared codes and I did cold start, car seems to work smoothly (no missfires, no rough idle)
When it works for abit (aprox. 30-40sec.), car slowly starting to missfire and almost chocking. But it doesnt shut down. When I rev it until 2,5k-3k rpms, check engine light comes up and rough idle.

I have diagnosed the car and I get error codes such as: P1338, P1336, P1030, P1062
(picture attached)

Spark plugs were changed.
Injection coils and VVT solenoid sensors checked and working!
Turbo pipe has been replaced due to cracks.
No rattle on cold start, timing belt sounds okay.

If you had simillar issue, could you please advice on what should I check next?
Abit frustrated, but I believe it can run again smoothly.

Thank you for your time in advance!

 

[neilgsxr69]

Probably HPFP starting to fail although you haven’t got that particular fault code but it usually starts with intermittent misfires and limp eml under hard acceleration.

 

[lfe]

I had similar problems a while ago, as neilgsxr69 says the problem was the high pressure fuel pump, I dismantled it and sent it to be repaired, there's no need to buy a new one!

To verify that it is the pump, you can monitor the rail fuel pressure, which should rise to 50 bar upon starting and remain at 50 bar before 2 seconds, with oscillations but always at 50 bar or more. If it does not, the pump is faulty.

 

[Pedro]

Run the car with the scanner attached using live data & check the high & low fuel trims under load this will state whether the HPFP is failing as mine showed when I followed this procedure