Can you post a data log with this happening to datazap.me and link it here? That might help us in diagnosing the issues.

 

Do I just use log files from the AP?

 

Check your high pressure fuel pump sensor on the left side of the fuel rail. I bet it’s leaking. Ask me how I know

 

No leak or smell that I can see

 

Yeah, your FRP desired and FRP actual are WAY off several times in the pull. What's your boost look like on the run? I didn't see that PID as part of the DL?

@Dirtfiend602 may be right on the sensor and/or pump. Sure appears that there are some major discrepancies between what the computer is asking for and what the sensor is reading.

 

Yeah, your FRP desired and FRP actual are WAY off several times in the pull. What's your boost look like on the run? I didn't see that PID as part of the DL?

@Dirtfiend602 may be right on the sensor and/or pump. Sure appears that there are some major discrepancies between what the computer is asking for and what the sensor is reading.

I agree, and boost is going to about 18 pounds due to it being a stage 0 tune. Any suggestions on how to test the sensor and or pump?

 

Hopefully Dirtfiend will be along shortly to give some info on those since he had to troubleshoot his.

 

I didn’t back probe the sensor to test it, just replaced it.

 

Not enough PID to really dig into this. RPM, MAP, TIP, high & low fuel pressure ( actual & desired), ETC.

From the 3rd csv file I'm not seeing a large enough variation in the HPFP A vs D delta.

The HPFP has been known to get flaky due to the pressures it plays at. The low not so much, but nothing is out if the realm of possibilities.

The PCM can only command the HPFP higher as the only way to reduce the rails pressure is via the injectors opening.

The LPFP has three separate parts. Sensor, control module, and pump itself.

 

Not enough PID to really dig into this. RPM, MAP, TIP, high & low fuel pressure ( actual & desired), ETC.

From the 3rd csv file I'm not seeing a large enough variation in the HPFP A vs D delta.

The HPFP has been known to get flaky due to the pressures it plays at. The low not so much, but nothing is out if the realm of possibilities.

The PCM can only command the HPFP higher as the only way to reduce the rails pressure is via the injectors opening.

The LPFP has three separate parts. Sensor, control module, and pump itself.

Sorry the 3rd file was just average driving gear to gear, file 2 is actually a pull when it happens l, and file 1 is just making sure it would log due to it telling me I kept having too many pics.

 

I'll also get more logs with different parameters later tomorrow.

 

Make sure to add ETC & APP

 

Update! Ended up being a bad upstream O2 sensor! Thanks for the help!