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i got a p05 ecu i sent to xenocron awhile back. it was sent back sating that the fuel prime was constantly on. any idea what could cause this? looking at the board everything looks good. where should i start testing?

STA413....ic

hi,
sorry to attach your post.. Got the same symptom with your problem. P28, 11F0 board, cel remain on and fuel flooded in the eng block.

progress : change the c14, qm1,qm3 and clean the board. Test, the result still the same, cel still there.
change to known good ecu, cel goes off, harder to start. need to rev a few time to start.

D5 and D10 seem good since the are resistance in M ohm.. is there C201 also a point in this case?

any idea is appreciate..

thanks..

in the top left hand corner you will see 3 big "transistors". the bottom one is the STA413....ic. thats what i changed on my p05, works awesome now. if you got a junk ecu i would try swapping that out.

already done bro.. qm3 is sta413a..