07 Mps Bucking under acceleration

[ConorNeate]

Hi guys, so recently my mazdaspeed 3 has started bucking/jerking under acceleration as if the car was cutting fuel, which it seems to be as when this happens the fuel pressure drops to 0 but car still runs, it seems to happen about 15 minutes or so after starting the car, I have a Fuel rail pressure sensor low input code, and was wondering if anyone would have had a similar issue, i originally thought it was hpfp internals, so upgraded to Cork-sport, but hasn’t made a difference what so ever, if anyone has any idea if it could be the Fuel pressure sensor itself, the spill valve, please let me know, Cheers


Sent from my iPhone using Tapatalk

 

[jsilva]

I had a similar issue. I replaced the fuel pressure sensor and it ultimately did not fix the issue. If I recall correctly, it was the ground near the HPFP. I cleaned and lightly sanded the parts and used deoxit and the problem never returned.

 

[Mike Sauz]

Hi guys, so recently my mazdaspeed 3 has started bucking/jerking under acceleration as if the car was cutting fuel, which it seems to be as when this happens the fuel pressure drops to 0 but car still runs, it seems to happen about 15 minutes or so after starting the car, I have a Fuel rail pressure sensor low input code, and was wondering if anyone would have had a similar issue, i originally thought it was hpfp internals, so upgraded to Cork-sport, but hasn’t made a difference what so ever, if anyone has any idea if it could be the Fuel pressure sensor itself, the spill valve, please let me know, Cheers


Sent from my iPhone using Tapatalk

I have the same exact issue as you right now. FP ground suggested did not resolve my issue, neither did the FP sensor being replaced. Was wondering if you had any success?

 

[chris' speed 3]

any update on this?

 

[DustinDriver]

i had the same problem with a cel light for fuel rail pressure sensor voltage low. replaced the sensor with another 140 bar sensor and fixed the issue