Can someone please let me know what is the sensor offset angle for a 36-2 standard crank angle sensor pickup. This is a standard South Africa spec FZJ79R pickup, but I am sure that all the 4.5EFI motors have the same ECUs. Theoretically it is possible to use a timing light to get this value set properly however it seems the timing on the vehicle is restricted at slow speeds that the timing light can perform at and the available range of 3 - 10 degrees is just not enough to be seriously confident of the results
4.5EFI crank angle sensor
- Thread starter Earth
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- #3
I have an aftermarket ECU in from www.spitronics.co.za and can therefore do pretty much what I want with the timing (provided I can rely on the measured crank angle) and at this stage I am desparate for an answer without stripping stuff to find out.
Hello.
I am not sure about what you mean.
Anyway, I checked the manual; I could not find crank angle sensor. I did find knock sensor, which is close to the crank shaft pulley angle scale, and I scanned the corresponding page.
For reference I scanned the EFI system diagram as well.
I can look again later this week.
Hope this helps.
Juan
I am not sure about what you mean.
Anyway, I checked the manual; I could not find crank angle sensor. I did find knock sensor, which is close to the crank shaft pulley angle scale, and I scanned the corresponding page.
For reference I scanned the EFI system diagram as well.
I can look again later this week.
Hope this helps.
Juan
Last edited:
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- #5
The sensor I am dealing with is not a knock sensor and in fact the 4.5EFI motor I have does (sadly) not have knock sensors.
The sensor in question is connected to a very distinctive cable that runs through a channel on the underside of the sump and is attached to a magnetic pickup under the front of the crank, behind the pulley.
It detects teeth on a disk fixed to the crank, behind the pulley which is difficult to access so I hope to find an answer from someone who has been in this predicament before.
The settings are well described in the manual attached but in essence the number I am looking for is the angular displacement of the sensor position at TDC, this is set in the ECU as a combination of a teeth count and fine tune angle.
The installer of the ECU has this set wrong at 5 teeth and 4 degrees of fine tune. As the crank wheel in my case is a 36-2, 36 teeth with two teeth removed for a zero reference, and as 360 degrees / 36 teeth = 10 degrees per tooth, this means the sensor is currently configured for 54 degrees offset, this should produce a timing reading with a timing light of double the actual timing position, i.e with timing at 10 degrees on the ECU the timing light shows 20 degrees as the system is wasted spark, this is not the case, not even nearly, so there is a problem and short of stripping the crank pulley off, which is a major exercise for which I don't think I have the stamina, I am not finding any useful answers.
Many thanks
The sensor in question is connected to a very distinctive cable that runs through a channel on the underside of the sump and is attached to a magnetic pickup under the front of the crank, behind the pulley.
It detects teeth on a disk fixed to the crank, behind the pulley which is difficult to access so I hope to find an answer from someone who has been in this predicament before.
The settings are well described in the manual attached but in essence the number I am looking for is the angular displacement of the sensor position at TDC, this is set in the ECU as a combination of a teeth count and fine tune angle.
The installer of the ECU has this set wrong at 5 teeth and 4 degrees of fine tune. As the crank wheel in my case is a 36-2, 36 teeth with two teeth removed for a zero reference, and as 360 degrees / 36 teeth = 10 degrees per tooth, this means the sensor is currently configured for 54 degrees offset, this should produce a timing reading with a timing light of double the actual timing position, i.e with timing at 10 degrees on the ECU the timing light shows 20 degrees as the system is wasted spark, this is not the case, not even nearly, so there is a problem and short of stripping the crank pulley off, which is a major exercise for which I don't think I have the stamina, I am not finding any useful answers.
Many thanks
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- #6
For the record the correct answer this question seems to be 80 degrees or 8 teeth