Cold no Start cm870

[Rawze]

(03-11-2023 )Shinaver Wrote:  Hello,
Thank you for replying to my question. Many questions you ask.
Unfortunately the answer to most if not all is that i do not know.
I will say that if this truck worked in a year round warm climate
we would not be having this conversation. This trucks runs good
works daily pully an 8 axle trailer hauling steel with loads with an
average 100k on the deck. 4.8 mpg.
The shop did use mechanical gauges to check fuel pressure, said
it is good. Mechanical pump replaced approx. 200k miles ago. Batteries
will be 4 years old in June. They load test good, starter replaced
with high torque 6 months ago.
Getting back to the main question. Taking into consideration all of
the components you brought up earlier. Coolant temp. is the only
variable that separates a starting truck and having a no start condition.
What changes, how and why. Correctly answer that question and we
have solved this dilemma.

I think you kinda missed the point there.

External gauges mean nothing vs. what that ecm sees.

maybe that repair shop needs some proper training?.

again ... WHAT IS THE FUEL PRESSURES SHOWING IN INSITE DURING CRANKING??? .. AND OIL PRESSURES???... ON THE ECM???... BECAUSE THE DAMNED THING WILL NOT FIRE OFF THE CYLINDERS IF THE FUEL PRESSURE IS BELOW A CERTIAN PRESSURE THRESHOLD IN THE ECM!!!. - IT IS NOT LOOKING AT THE COOLANT TEMPS DURING CRANKING!!!.. IT IS LOOKING AT THE FUEL PRESSURES!!!

YOU ARE NOT LISTENING!!!!!!!

and ... I DON'T CARE HOW WELL YOU THINK IT RUNS!!!.. IF THOSE ROD AND MAIN BEARINGS WERE NOT REPLACED AT THE 800K MILE MARK LIKE THEY SHOULD HAVE BEEN- -- .. THEN AT 1.2 MILLION ... THAT ENGINE IS NOW A GODDAM#N TICKING TIME BOMB!!!!! ... THAT IS GOING TO PUT A PISTON THRU THE SIDE OF THE DAMN ENGINE BLOCK WITH ABSOLUTELY ZERO GODDAMN WARNING AT THIS POINT!!! ... YOU ARE NOT LISTENING TO WHAT WAS POSTED!!!.. YOU SEEM TO BE BLINDED BY YOUR OWN MIS-GUIDED THOUGHTS IT SEEMS!!!.. YOU DID NOT ANSWER THIS .. SO SOMEONE CAN ONLY ASSUME THAT THE ENGINE HAS NOT BEEN CARED FOR PROPERLY OVER THE YEARS AT THIS POINT!... AND THAT IS NOT GOOD AT ALL!!!. NOT ONE BIT!!. THIS IS THE TYPE OF BLINDNESS THAT TRUCK OWNERS GET INTO "BECAUSE IT SEEMS TO RUN OK FOR NOW" IS EXACTLY WHY THERE ARE REALLY BAD THINGS IN ITS FUTURE!!!. IGNORING AND NOT DOING ALL OF THE RECOMMENDED MAINTENANCE ITEMS FOR THE ENGINE EVENTUALLY LEADS TO A CATASTROPHIC FAILURE WHEN YOU LEAST EXPECT IT TO HAPPEN.

SOME FOOL KEEPS DRIVING THAT THING WELL PAST THE 1_ MILLION MILE MARK.. THEY HAD BETTER WELL DAM,N HAVE DONE THOSE ROD/MAIN BEARINGS IN ITS PAST AT AROUND THE 800K MARK OR SO ... THEN YOU HAD BEST MAKE SOME PLANS REAL SOON TO HAVE THE WHOLE ENGINE INFRAMED AT THIS POINT --- BEFORE IT BECOMES A BOAT ANCHOR!. IT IS NOTHING AT ALL TO TAKE LIGHTLY.. NOT ONE DAMN BIT!.. AND IS FAR MORE IMPORTANT THAN IT NOT WANTING TO CRANK SOMETIMES.

AND AGAIN...

WHEN IS THE LAST TIME THE CRANK SHAFT DAMPER WAS REPLACED!???.... IF THAT DAMNED CRANK SHAFT DAMPER IS NO GOOD ANY MORE THEN IT WILL CAUSE JUST ENOUGH VIBRATION THAT WILL MAKE THE DAMNNED ECM FLAKY AND NOT WANT TO RUN PROPERLY WHEN COLD ... OR FOR IT TO RANDOMLY DIE AS COMPONENTS ON ITS CIRCUIT Board start vibrating loose!. IT IS A VERY COMMON ISSUE.. AND MIGHT BE RELATED TO YOUR NO-START ISSUES AT TIMES. == BUT YOU WERE NOT LISTENING!!!. . -=-= again/.. read my damn post!!!..


EVERY DAMN BIT IF WHAT I SAID ABOVE ABSOLUTELY HAS TO DO WITH YOUR ISSUES AND THE HEALTH OF THAT ENGINE AS A WHOLE!!!.. ABSOLUTELY!!... BUT YOUR LAST POST SHOWS THAT YOU ARE BLINDED BY SOME SHORT-SIGHTED IDEA OF SOME SORT INSTEAD!!!

GO BACK AND RE-READ EVERYTHING./.. CAREFULLY!!.. THERE IS A REASON FOR ALL OF IT!!!.

Looks to me like you have gotten blinded by your own thoughts on what might be wrong. ... Seems that you are not concerned so much with all the things I posted about. .. OF WHICH YOU SHOULD BE REALLY REALLY CONCERNED WITH!!..

SO...

No one can help you if you do not listen and do not do and consider these things /make the tests recommended above .. your last post implies that you are stuck on one subject and are NOT LISTENING!!!>.. AND ALSO RELYING ON "THE MECHANIC" .. INSTEAD OF TAKING MATTERS INTO YOUR OWN HANDS SO THAT YOU CAN SOLVE THEM PROPERLY!>

You wanted some help, otherwise you would not have joined.. . .. but it seems that you wanted some kind of miracle wish-it-away sauce advice or something. THAT IS NO WAY TO TREAT A DAMNED COMMERCIAL PIECE OF EQUIPMENT!!!!

{this user has been muted to prevent them embarrassing themselves further}.

I cannot help you.. no one can.. you do not seem to be concerned with much of any of the things THAT ACTUALLY COUNT TOWARDS A HEALTHY ENGINE/TRUCK AND SOLVING ITS ISSUES!!!