Medium and Heavy Trucks
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Hi Matt. My name is***** will be glad to help. If the ECM is good and powering, fuel system checks good and no air and restrictions then Most likely it is the SRS and TRS sensors not picking up signal.
Here is some test info to help. Run through the TRS and SRS testing to verify signal, etc.
Hi Matt, Yes i do believe the damage can cause a loss of signal. I would definitely verify you have speed signal to the ECM. Phone calls are available at an additional service if you would like to ad a call or we can post back and forth here as needed. I will send of the Premium service offer in case.
Hi Matt, Did you try to share some pictures? if so they did not post for some reason. So it will start on ether and then run for the rest of the day with no troubles or you have to use ether each time you start it warm or cold?
Ether makes the engine cranking speed faster and therefore engine speed signal changes so if the batteries and starting system is good and not cranking slow and the ECM does not have low voltage during cranking then it could definitely be the damaged tone wheel. Check ECM voltage cranking.
If your fuel supply pressure is good, the return restrictive 90 degree fitting at the back of the head is there and ok, no leaks or sucking air, If there is no smoke while cranking it means the ECM is not enabling fuel to the injectors. since you tried many ECMs with no luck, I would lean more towards TRS and SRS signal and sensor alignment with the gear as well as fixing the damage to the tone wheel.
Hi Matt, That is where I was going actually. I was saying tone wheel. It sounds like the sensor is not picking up signal so check for an alignment issue or gap issue between the tone/pulse wheel and for potential further unforeseen damage from the accident that would cause an erratic signal.
It definitely would if the sensor is not picking up the correct signal. The ECM wont fire the injectors.