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Fresh engine Crank no start

Is it a GLE or GL4 program from Heath? do you have a functional EGR? I would call them to see if they ever set them that low, as I suspect they set all of them closer to 11 degrees. If that is the case I would spin your CPS in the timing cover. Try unplugging the CPS and see if the desired/measured timing changes or if the miss and cam references stop incementing.

Your idle fuel rate is fine. The file I posted gives some guidance on taking the OS out and how to set it back up in the truck. I would first find out if the program is supposed to be 5.7 degrees.
 
It is their performance tune. Not sure if that is the GLE or GL4. Ditched the EGR and using an F code intake. I can call them tomorrow to check on where they want timing. Thanks buddy
 
Yes, it will take a little more cranking to start it with the CPS unplugged, about 10 seconds, but then it will only read from OS, and be in backup fuel mode.
 
Talked to the guys at Heath. 5.7 degrees is ok. Crank sensor unplugged it was 7.3 degrees. Not sure what that means. Anyway I swapped the drivers side injectors out from the old engine. No change. Quick question. Is #7 injector on tech 2 the same as # 7 on the engine? (drivers rear) Doing the cylinder balance test again, it seemed to stay the same when I revved it (injector 7 disabled)
 
Yes, # 7 on the Tech2 would be the drivers rear. A compression test would tell you the health on that cyl.
 
Did the guys say that is the timing they programmed it at idle, which would be timing at 5mm3 to 10mm3 of fuel? Its a yes/no kind of answer they should be able to give. If it is a performance EPROM for a non-EGR tune then it should be 8-11 degrees at warm idle. If they did program it that way for performance I would ask them to reprogram it for 9 degrees at 5 to 10mm3 of fuel. It makes a huge difference in throttle response and sometimes at that low idle timing it can make a worn IP perform worse. The only programs I have seen that low are some of the original programs from 1994 which had as low as 4.5 degrees, but GM seemed to wise up and made others 8.5 degrees, and then in later years even went to 11 degrees. None of the 95 EPROMs I have were that low.

Unless perhaps you got the economy GLE programming.
 
He didn't say yes or no. Just yeah thats OK. Bill is supposed to call me back tomorrow though.

So actual timing is not adjusted via adjusting pump position then?

Thanks as always for the feedback.
 
The desired/measured timing is a function of the program only, you cannot affect it unless you move the pump so far to the drivers side that the base timing is over the desired timing. Then you could see the desired as whatever was programmed and the measured as the base timing, so you could see 5.7 degrees desired and 7 degrees measured because base timing is too advanced. In that case the TDCO learn would be way out of tolerance.

So if it ends up that is the way they programmed it I would ask Bill to redo that part.
 
Question buddy. You said it should run on the Optic sensor alone or the crank sensor alone correct? Engine running when I unplugged the OS it died. When I unplugged the CPS it went into backup fuel as you said it would. Have not pulled and cleaned the OS yet. Expecting a call back from Bill today to talk about timing.
 
bison said:
That would point to a faulty CPS, don't it!.
Click to expand...

Cannot argue with that. It sounds like symptoms when the CPS is rotated in there or just faulty but receive something as to make the PCM think its working. So you dont get the DTC19 for it failing, but you are getting some weird things happening.
 
Get a look at it, and if it has a platic mounting tab that is part of the sensor body, and its not broken then its just faulty and needs to be replaced. If the mounting tab is broken which allows it to rotate then it might just be in wrong. If it has a metal mounting tab then it could be either case, because the metal tab can come off the sensor and put back on wrong, 90, 180 or 270 degrees off. So you can pull it out and turn it and see if it resolves the incrementing CAM references missed.

That is if you can get it out without breaking it :)
 
Swapped IPs yesterday. Timed it this morning. Runs great. We can finally put an end to this thread! Thanks everyone for your help. Couldn't have done it without you all.
 
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