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Dears,
For those who remember my 1078 fouled twice the spark plug in cylinder 1. Result was loss of power and cylinder 1 working with 30C less temperature than the other 3 in all temperature range. The plugs were fouled after 2000kms and with slight warning both time (on/ off working till dead). No deposits on plugs just nice gray color only last time the tip was evidendly burned. More current through the plug was our best estimate.
Finally after checking ignition coils, injectors, fuses, any oil leakage contaminating the plug etc etc all found normal except we found out that the Air temperature/ pressure sensor at the front left air intake was measuring 2.3 V and -24ΚΩ at room temperature during a feed test. As per service manual values should be 4.5V and 2.6KΩ respectively. This is a Magnetti Marelli part by the way and it seems damaged (purely from these values).
Has anyone experienced a faulty air pressure sensor and could that lead to more current through the spark plugs? I think that sensor converts pulses /readings to voltage through the ECU (which decides the volume /measure of ignition) but still it should foul all cylinders not just one and specifically the left one and also immediately not after 2,000 kms..
Appreciate thoughts please.
Thanks again
Phil
For those who remember my 1078 fouled twice the spark plug in cylinder 1. Result was loss of power and cylinder 1 working with 30C less temperature than the other 3 in all temperature range. The plugs were fouled after 2000kms and with slight warning both time (on/ off working till dead). No deposits on plugs just nice gray color only last time the tip was evidendly burned. More current through the plug was our best estimate.
Finally after checking ignition coils, injectors, fuses, any oil leakage contaminating the plug etc etc all found normal except we found out that the Air temperature/ pressure sensor at the front left air intake was measuring 2.3 V and -24ΚΩ at room temperature during a feed test. As per service manual values should be 4.5V and 2.6KΩ respectively. This is a Magnetti Marelli part by the way and it seems damaged (purely from these values).
Has anyone experienced a faulty air pressure sensor and could that lead to more current through the spark plugs? I think that sensor converts pulses /readings to voltage through the ECU (which decides the volume /measure of ignition) but still it should foul all cylinders not just one and specifically the left one and also immediately not after 2,000 kms..
Appreciate thoughts please.
Thanks again
Phil