No power with Check Engine light on

[arrowstrap]

This is EXACTY what my truck did... to the T! same issues.

It was in fact the UVC wire harness. had to replace burnt harness, melted gasket and all plugs just to be sure they were not creating resistance heat in the harness UNDERSIZED wires. to be sure of the side i took a thermal reading of the engine while it was malfunctioning... seemed to be running off half the engine... and it was. the cooler side was the burnt side. aside from some bolts that are near impossable to remove it was a quick fix.

I replaced the plugs and harness on the other side a few weeks later and it when out as well.

 

[arrowstrap]

While everything is opened up i'd check the injector seals. they seem to break down with time and drink your oil.

 

[Brad B]

While everything is opened up i'd check the injector seals. they seem to break down with time and drink your oil.

Well with 192,000 miles now would if be a good idea to just replace the injectors while I'm in there? What are some signs that injectors need replacing? I go through about a quart of oil in between oil changes at every 3,000 miles. Would that be because of the o-rings leaking on the injectors.

I plan to keep the truck another 2 years if I can and would like to make it last.

Thanks for the input.

 

[arrowstrap]

i dont know the service life of the injectors so i cant advise on the replacement age. two years isnt that long for an injector to keep injecting however im sure the ports are not the same as they were in 96 and that the spray has become altered somewhat by now. i think there are rebuild kits you can get instead of replaceing them might be cheaper.

If your seals are leaking it will surely burn your oil and steal some power as well.

 

[Brad B]

i dont know the service life of the injectors so i cant advise on the replacement age. two years isnt that long for an injector to keep injecting however im sure the ports are not the same as they were in 96 and that the spray has become altered somewhat by now. i think there are rebuild kits you can get instead of replaceing them might be cheaper.

If your seals are leaking it will surely burn your oil and steal some power as well.

So my oil loss could be through the injector o-rings? I guess the frugal fix would be to just put new o-rings on the old injectors while I have it apart.??

Still waiting on parts until Thrs. so I have some time to mull it over.

Thanks

 

[arrowstrap]

Yes that is correct. if you have bad rings to stop the oil loss is to replace them. pick at this for a while:

TSB
98-23-13

* HESITATION/STUMBLE - POOR SEAL ON INJECTOR O-RINGS - 7.3L DI TURBO
* IDLE - ROUGH - POOR SEAL ON INJECTOR O-RINGS - 7.3L DI TURBO
* LACK OF POWER/POOR PERFORMANCE - POOR SEAL ON INJECTOR O-RINGS - 7.3L DI TURBO
* STALLS - POOR SEAL ON INJECTOR O-RINGS - 7.3L DI TURBO
* OIL - EXCESSIVE OIL CONSUMPTION - POOR SEAL ON INJECTOR O-RINGS - 7.3L DI TURBO

Publication Date: NOVEMBER 10, 1998

LIGHT TRUCK:
1994-1997 F SUPER DUTY
1994-1998 F-250 HD, F-350
1995-1998 ECONOLINE

This TSB article is being republished in its entirety to include vehicles through the 1998 model year.
ISSUE:

On vehicles with a 7.3L direct injection (DI) turbo diesel engine, one or more of the following concerns may be present:

* Rough Idle
* Stalling
* Hesitation/Stumble
* Loss/Lack of Power
* Poor Fuel Economy
* Excessive Oil Consumption

These concerns may be caused by the injector cushion O-rings deteriorating, resulting in a poor seal. This condition cannot be detected with conventional diagnostics (i.e., it will not produce diagnostic codes with either Super Star or New Generation Star Testers).
ACTION:

Remove the injectors, check for deterioration of the cushion O-ring. If necessary, replace the O-ring with a new O-ring which has a more robust design and should not deteriorate under severe conditions.

 

[Brad B]

Thanks. Looks like I'll be exploring the innards of the injectors soon !!

Nice to have this site available to solve such questions for us part time experts!!