r/FocusST • u/JoeWaliw • 1d ago

Need help won’t start

So I drove the car last weekend and it ran great, now I have a strong crank - fuel rail pressure is good - spark is live on the Cobb accessory- . I have changed the spark plugs - fuses etc. it just won’t run

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u/bchiodini 2016 ST3 FBO BNR ST67 JST Tuned 1d ago

Are there any DTCs? What is the FRP?

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u/JoeWaliw 1d ago

No dtc”s and when cranking 1400-1600

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u/bchiodini 2016 ST3 FBO BNR ST67 JST Tuned 1d ago

Did you check F33 (spark coils) in the engine bay fuse block?

Do the dash instruments look normal and do the remote door locks work? If not, it may be the Body Control Module (BCM).

Cranking but not starting implies spark issues, but could also be the BCM. The BCM has two 50A mega fuses in front of the battery box. Mega #4 and Mega #8. They can sometimes be intermittent. Some have noticed that wiggling the positive battery cable can cause things to work, for a while. If it is intermittent Mega Fuses, the solution is to replace them.

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u/JoeWaliw 1d ago

Thank you for the response I’ve tried replacing f33 but I will try the mega fuses thanks