Which sensors can affect acceleration on a 1NZ engine for Toyota Sienta 2005, and where can i find them ?
No sensors affect acceleration specifically but all of the sensors provide information about engine conditions, load, speed, temperatures and so forth for the ECU to make the correct adjustments to the spark and fuelling.
One or more sensors can become tired and deliver inaccurate information without triggering a fault code. This might have a minimal effect on normal driving and a more marked effect on acceleration. It needs someone with experience and some decent diagnostic equipment to study the live data and recognise the suspect sensors.
The above stage should be the last stage of a process. The first stage would be to carry out a thorough visual check and to ensure the routine maintenance is up to date. On some engines a valve timing check should be carried out as part of the preparation.
The next stage is to carry out a fuel pressure and delivery test. Insufficient fuel delivered at the wrong pressure and a couple of dribbling injectors would reduce acceleration whatever sensors are replaced.
If no faults are found and the performance is still down, the next stage is to remove the injectors for specialist inspection/overhaul/replacement...
Mar 06, 2016 |
Toyota Cars & Trucks