No boost......no power

[Roysbigtoys]

(02-28-2020 )Rawze Wrote:  

(02-28-2020 )JimT Wrote:  

(02-28-2020 )Roysbigtoys Wrote:  ...
Arrrrgh......what am I missing?

Maybe you missed this...

(02-18-2020 )Rawze Wrote:  According to the file you sent me, you have some wiring issues, or the ecm is going bad.

multiple errors for accelerator pedal, fuel shutoff solenoid, fuel pressure, IMAP, and exhaust gas pressure sensors are all showing they are shorted out.

These are error codes 132, 1241, 255, 547, 123, 2374.
...

did you clear all those codes? -- have any come back>?

you have something wrong somewhere, it just needs to be found.


might be turbo itself... maybe use CT program to manually override its position and see if it chokes the engine out hard at idle when at the 98+% closed position to see if the exhaust impellers and VG vanes are not worn off or damaged? (this cannot be seen from looking into the back side of it). Can also do this to maybe find some air related leaks?


BTW: have you pulled the down-pipe off the back of the turbo and taken it for a spin at max engine load? -- Does some or all of the boost come back>?

Did you verify the cross-pipe and feed circuit for the exhaust bp sensor is not clogged up?- that one is common too. Pull out the exhaust bp sensor (top of thermostat), spray some brake cleaner down into the hole , crank the truck and see if it comes blasting back up out of the hole.

does the barro sensor read somewhat close to the barometric pressure in your area?

maybe start considering a trip to hags or uni's shop for a second set of eyes on it if nothing else.

Lol....... I was so frustrated last night I was really considering bob tailing 875 miles to Mr Hagg's shop. My truck has been running at about 50% for over a month, driving there is definately on my radar if I can't get back to 100%.
I removed the bp sensor, sprayed brake clean into it, started the engine and it blew it back out.
The engine was still cool. I could put my finger over the bp sensor hole and feel exhaust gas pressure.
I deleted all codes, none were active and no codes came back after a test drive.
The barometric pressure reads 29.3 with insite and 29.39 at the nearest weather station.
I did pull off the exhaust pipe off and drove it with no change. I did not take off the short (6") attached directly to the turbo, but I will if it would make a difference.
What is the CT program, I assume it is something I can do with insite?