Hi all, struggling with a Hyundai Santa Fe non starter. OY11 ZTW KMHSH81XNBU727692
Wondering if anyone has any ideas as I’m not brilliant at diagnostic but I’ll always have a go.
Vehicles a 2011 2.2 TCI Diesel. Unfortunately through a combination of myself and other garages, so far it’s had a second hand high pressure fuel pump, new fuel metering valve and regulator, rail pressure sensor, engine ECU and a fuel filter.
With a little brake cleaner it starts and runs all day, fuel pressure normal 29.00MPa 19% duty at rail regulator at idle but in limp mode due to fault code intermittently in ECU after starting on brake cleaner, fuel rail pressure too high P0088. As soon as vehicle is shut off it will crank until battery dies.
I’ve checked wiring between injectors, fuel pressure sensor, metering valve and regulator back to ECU, no faults found. During crank the injectors are not being activated but as soon as it picks up on the brake cleaner and fires up, the injectors start working, it’s a site vehicle so I’m on and off it as and when we get a gap inbetween jobs.
Fuel temperature reading is normal, I’ve checked the new Bosch rail pressure sensor against Bosch specified readings and it’s within spec at idle, cranking and rest. However when cranking PID data shows cranking at high pressure, measured a while back so don’t have the exact figure, I think around 55.00MPa..
I’m not sure how the ECU is seeing high pressure during cranking as what I measure at the rail pressure sensor is within spec so i thought that was the cause of it not firing the injectors. I spoke to ECU testing and they had 4 other cases where this same fault had been reported with failed ECU’s shutting off injectors on cranking but they were unable to repair the ECU’s.
It’s probably going to be something silly I’ve overlooked but obviously this vehicle is becoming a bit of a money pit, thankfully not at the customers expense, this vehicle was sold to us as the previous owner had given up trying to get this fixed elsewhere.
thanks In advance.
Wondering if anyone has any ideas as I’m not brilliant at diagnostic but I’ll always have a go.
Vehicles a 2011 2.2 TCI Diesel. Unfortunately through a combination of myself and other garages, so far it’s had a second hand high pressure fuel pump, new fuel metering valve and regulator, rail pressure sensor, engine ECU and a fuel filter.
With a little brake cleaner it starts and runs all day, fuel pressure normal 29.00MPa 19% duty at rail regulator at idle but in limp mode due to fault code intermittently in ECU after starting on brake cleaner, fuel rail pressure too high P0088. As soon as vehicle is shut off it will crank until battery dies.
I’ve checked wiring between injectors, fuel pressure sensor, metering valve and regulator back to ECU, no faults found. During crank the injectors are not being activated but as soon as it picks up on the brake cleaner and fires up, the injectors start working, it’s a site vehicle so I’m on and off it as and when we get a gap inbetween jobs.
Fuel temperature reading is normal, I’ve checked the new Bosch rail pressure sensor against Bosch specified readings and it’s within spec at idle, cranking and rest. However when cranking PID data shows cranking at high pressure, measured a while back so don’t have the exact figure, I think around 55.00MPa..
I’m not sure how the ECU is seeing high pressure during cranking as what I measure at the rail pressure sensor is within spec so i thought that was the cause of it not firing the injectors. I spoke to ECU testing and they had 4 other cases where this same fault had been reported with failed ECU’s shutting off injectors on cranking but they were unable to repair the ECU’s.
It’s probably going to be something silly I’ve overlooked but obviously this vehicle is becoming a bit of a money pit, thankfully not at the customers expense, this vehicle was sold to us as the previous owner had given up trying to get this fixed elsewhere.
thanks In advance.
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