Hello , in my Rs turbo I have had problems with ignition cut ( 4000 rpm) and I think it's related to boost pressure. I open the ECU and the MAP sensor doesn't change the voltage output when boost pressure increases . Stay about 2.54 v . The problem maybe it's related to this sensor ?

Thanks in advance

 

It's a 5v square wave frequency signal.
Measure the frequency.

Oops Escort not Fiesta with ofac.

 

OK... I think that it's an analog sensor .. you know the tipical values ? If it's not the MAP sensor what can cause the cut ? The abs can put ecu in security mode ?

 

Oops escort with ofab not fiesta with ofac.

Checked the tube running to the sensor is not leaking?

Getting any fault codes out of the EEC?

No not the abs.

 

My ecu is one motronic with knock sensor . I can't read the codes But I have checked all the tubes and it's ok . My MAP sensor is built in in ecu .The car is making 0.5 bar but when reach that boost pressure cuts at about 4000 rpm and even with full throttle stays like that. Shouldn't cut with 0.5 bar because is less than 9 psi ... The cut can be related to car velocity ?

 

Motronic, not the original.

You need to sort it with whoever set that up.

 

in Escort RS turbo S2 I think motronic ecu is the original ignition ecu . Not ?

 

0FAB is an eec-iv