Ok not updated this recently so here goes!
I purchased a genuine Toyota Efi temperature sensor in the end so I know where I'm at.
I have since returned to SRR for Ryan to take a look at the car on the rollers
He started off doing some map checks against what he had on record and decided to carry out some runs off boost to monitor fuelling, battery voltage etc and did this for 5 to 10 minutes maintains revs and speed
He was keen to try and work out what has changed since the initial map was set-up
In the end he ended up adding 15% more fuel into the map and has suggested I look at the alternator and fuel pump.
Not a permanent fix but potentially safer than it as been!
I have done some more monitoring of voltages and have found some concerning results!
Cold start/normal driving I see 13.6 Volts at the ECU (Viewed through the hand commander)
On boost this voltage DROPS to 13.2Volts! Again at the ECU.
Alternator voltage 14.15Volts
Fuel pump voltage cold start up/normal driving 13.20Volts
Fuel pump on boost DROPS to 12.77 and at times a little less!?
Swapped out the Alternator (Spare, used, unit from my shed)
Cold start I see 14.3 Volts at the ECU (Viewed through the hand commander) this voltage does drop to 13.6 after several miles and everything has warmed up, I believe this is normal? Or perhaps something is braking down with heat?
On boost this voltage does NOT drop at all and remains at 13.6Volts
Alternator showed 15.1volt on cold start up settling to around 14.15Volts which climbs as the boost and revs rise.
Fuel pump voltage cold start up/Normal driving is around 13.65Volts
Fuel pump on boost is still dropping to around 13.1Volts.
The fuel pump is wired through a relay in the boot and connected to the battery in the boot, only old wiring I'm using is from the fuel pump relay wiring as the signal wire.
Now if my ageing Walbro pump was getting tired is this a reason for the voltage dropping as it is drawing more current?
I'm sure the pump is 10 years old +?
I think it's fair to say the original alternator has had it!
Are the above voltages roughly what people are seeing!
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