P0236 misfires

[rfultz]

Big turbo Fiesta st 2015, recently started getting misfires when under boost like 10 psi +, then after a day of driving it became after 5 psi, and now it's anytime I hit throttle. Threw a code p0236 replaced both sensors multiple times the one on the manifold and one on the charge pipe. This has me scratching my head I haven't been able to figure it out. I've checked for boost leaks and didn't find anything. The car is barely able to hold idle at this point.

 

[TyphoonFiST]

Big turbo Fiesta st 2015, recently started getting misfires when under boost like 10 psi +, then after a day of driving it became after 5 psi, and now it's anytime I hit throttle. Threw a code p0236 replaced both sensors multiple times the one on the manifold and one on the charge pipe. This has me scratching my head I haven't been able to figure it out. I've checked for boost leaks and didn't find anything. The car is barely able to hold idle at this point.

When was the last time the plugs were checked? Compression check? Fuel pressures*?

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[rfultz]

When was the last time the plugs were checked? Compression check? Fuel pressures*?

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I swear you never sleep 😂 brand new plugs(less than five. Miles) , coil packs, compression was consistent across all cylinders I think like 148 psi cold across all cylinders same as before I put the big turbo in. New Injectors and New high pressure pump. I know it's a sensor issue. Could it be the boost control solenoid?

 

[TyphoonFiST]

Check the wiring at the boost solenoid for nicks or rub through on the wire insulation* you will need to lift the FiST to do a good thorough inspection*

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[rfultz]

I'll give that a try. Hoping I have time tomorrow. Thank you!

 

[rfultz]

Check the wiring at the boost solenoid for nicks or rub through on the wire insulation* you will need to lift the FiST to do a good thorough inspection*

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No dice, I even replaced the boost control solenoid. My barometric sensor is reading 4v at idle is this normal, if not what could cause this?

 

[rfultz]

Lmao I spent 500 at a shop for them to basically just unhook my fuel controller... It was the wire to power the fuel controller split second had come loose and was drawing power from the map sensor

 

[TyphoonFiST]

Lmao I spent 500 at a shop for them to basically just unhook my fuel controller... It was the wire to power the fuel controller split second had come loose and was drawing power from the map sensor

Fuel controller? Do you run Aux fuel?

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[rfultz]

Yes, I ended up going all out fuel controller 2860 Gen 2 bigger intercooler etc