Archived phone help truck down and its snowing

[roadking]

truck has a miss after injector replace i can't type very well need to talk (on phone) to explane all that has happened guys fix'em for a liv'vin please call me or send me your # and i'll call you. thanks

 

[rkressg]

I would check that all injector lines are tight and no external fuel leaks are present. You could have a leaking copper washer under the injector, allowing compression to leak out of the cylinder.

I would give a #, but I am in Taiwan (might get expensive).

Could be a bad injector. They can be pop-tested by a qualified diesel ship. I can not remember the pop pressure for a 3rd gen, but the injectors can be shimmed to get the correct pop pressure. If the injectors are high-mileage, they can get worn, causing a rough idle.

 

[Bob4x4]

I would check that all injector lines are tight and no external fuel leaks are present. You could have a leaking copper washer under the injector, allowing compression to leak out of the cylinder.



I would give a #, but I am in Taiwan (might get expensive).



Could be a bad injector. They can be pop-tested by a qualified diesel ship. I can not remember the pop pressure for a 3rd gen, but the injectors can be shimmed to get the correct pop pressure. If the injectors are high-mileage, they can get worn, causing a rough idle.

3rd gen injectors are electronicly fired-not by pressure

 

[2-ND TIME]

truck down and its ......

If it is electronically operated they should have a voltage that should be present for them to operate. The ones that I worked on had to have somewhere around 1. 5 to 3. 6 VDC to them. If so you might get that with a multi meter with a Min/max setting on VDC setting? As for the settings of the injectors I don't know and they should always be tested before they are installed. Good Luck.

 

[Bob4x4]

If it is electronically operated they should have a voltage that should be present for them to operate. The ones that I worked on had to have somewhere around 1. 5 to 3. 6 VDC to them. If so you might get that with a multi meter with a Min/max setting on VDC setting? As for the settings of the injectors I don't know and they should always be tested before they are installed. Good Luck.

Not even close... ... do not apply power to a 3rd gen inkeector you WILL fry it

 

[2-ND TIME]

truck down

No! I Wasn't saying to (apply voltage!) But the injectors that the diesel engine we were working with had an injector application voltage of the 1. 5 to 3. 6 VDC. But you should be able to check for voltage at the top of the injector! This would varify that the injector is working? What the voltage is I don't know.

 

[Bob4x4]

These injectors are triggered by a very fast hi voltage signal. I guaranty that you have nothing that can read it :-laf

 

[2-ND TIME]

truck down

Okay then What is the wire size and spec please????? ( Still very curious what the voltage is, for you say HI voltage and current so that would tell me that it might be 600 plus volts and high current) My suspiction is that it is lower but I could be wrong again???? If not my 87 multi meter an osocilloscope, graphing meter or I suspect that the DRB or its contemperary if the dealers know how to use it would tell if each injector is working properly? would read the voltages and graph the results. Which I made a harness to read my signal voltages for the Do_G_ 99 that I have, and now wanting to sell. Always looking for information? It is funny that I remember the voltage of those diesel injectors but not the current that they ran it was only a ???# 16 wire or so that they used to plulse them.

 

[Bob4x4]

Where did you read injector firing signals on a 99 that has mechanical injectors? :-laf

The common rails are approx 80-90 volts and a very small current flow. The drb can not measure it,nor is it fast enough to graph it. An o'scope would be capable if it could be set fast enough. A portable volt meter will only be able to measure injector coil resistance. The ecm is fast enough to sense an error and trip a code.



Bob