12.7 questions

I wouldn't worry about the check engine light. The borrowed ECM isn't programmed for your truck/engine. Honestly ECM's are pretty much bullet proof so I've had my doubts that your ECM was toast.


What I know about the Series 50/60:

-Injectors are controlled by PWM from the ECM. If they all use a common ground I'd be checking that. Since it runs on ether, we can pretty much rule out camshaft or geartrain issues. If you've had both sensors out, have you taken a look inside where the sensor sits and checked the tone ring teeth? Damaged tone ring will screw with your sensor outputs.

-ECM needs to see speed sensor signals from the SRS/TRS sensors. Have you confirmed the wiring to the sensors is good?

-ECM needs to see keyed and constant power. I believe you said you checked the constant power to the ECM but have you verified that the ECM is getting keyed power?

 

With all due respect, your wrong. As I said I did exactly what I described. All I can say is if you’re ever in the same situation as I was. It works. I used the mini compressor, after being told by more than 1 mechanic, Detroit and Freightliner to pressurize tanks. One suggested buying a fuel cap and welding a fitting in it. Once pressurized, the fuel pump finished the job. Though I could be offended by someone disputing my claim. I’ll take it as a compliment. I was in a jam at the time. Improvised a great cheap solution, that will hopefully help someone in the future.

 

It works, I’m not the first to ever pressurize the tanks. I got the idea from Detroit mechanic, just improvised the process with the mini compressor, since I didn’t want to drive 200 miles, and lug my compressor and generator back in a rental car. I had even called the Petro,they claimed they could prime it. the guy came out, and said he couldn’t prime it with his compuchek tool as mine didn’t have the fitting, like the new ones do. He also said it was against policy to pressurize a fuel tank. My only mistake was putting too much (almost 20 lbs.) air in system. It started and ran, I started video taping it, to send to my wife, as She was hospitalized with a kidney stone.After a minute or so, it shut down. I thought I might have screwed something up. But after letting air bleed off, it started with barely a shot of ether for good luck. The next problem I had was how to get rid of 20 gallons of fuel/ oil mix that I drained from oil pan. I put half of it back into tanks, since I only had 10 empty jugs, I hated to do it having just changed injector, but it didn’t hurt a thing. It’s been 3 yrs ago. Trucks still running good.

 

Thanks, as I said I’ve got better things to do than make up BS stories. I’ll admit though, I’m proud of my idea. This was the second time I changed an injector. Both times were learning experiences, doing myself out of financial necessity. Also neither time did I adjust valves. I only set injector height with .81 mm tool. I was told by some, that also was impossible. But I did both of them that way. Never have ran an overhead since.

 

Maybe I’m missing something here, but if red check engine light is on now, with the new ecm installed. Why not check the code? Red code = active. Yellow code= stored.

 

Whatever. I'm done with this.

 

Me too.... good luck.