In need of some help on this issue!! I'm moving across to the west side of WI and I need to get my crap home this weekend.
2000 GMC K3500 6.5 Diesel has lost all power over ~2200 rpm. Started doing this the other day.
taking off from a stop you can feel the power start dropping off a little before it shifts to 2nd and sometimes a fishbite or 2
2nd gear if you put it down WOT it will get stuck there and wind up to ~3000 RPM and not shift till you backoff the pedal
if you set the cruise and hit even a small hill it will downshift to 3rd, RPM's jump and speed keeps dropping.
Only way to maintain Hwy speed is in OD being careful not to let it downshift. Keeping it under ~2200 RPM.
Here is what I have checked and have made no imporovement, WHAT AM I MISSING????
No SES light or any current codes. Can sometimes get one for over-boost with the TMaster, have since dialed it back to max at 8-10 PSI boost pulling my trailer never had a powerloss like this before even when it coded for over-boost.
Pulled the Lift pump and blew air back to tank to possibly clear the sock. Ran outlet side to a clear line into a bucket. Appears to be good flow, nice solid stream through the 3/8 line and no air bubbles seen.
Clear line on the IP inlet - No Air bubbles seen while driving.
Fuel Pressure at water drain: key on builds to 5-6 PSI. Driving it maintains ~5.5 PSI all the time including during the defuel event
Not seeing any pressure on the return line outlet. Blew air back to tank
Put in a new WIX fuel filter
Had a helper last night so I had him drive so I could watch the laptop better.
TDCO -1.5 something
Timing Actual & desired follow each other closely
IAT's under 180
Max Boost ~23 minus 15 at startup = 8 PSI about what the guage on the pillar pod reads
Fuel solenoid closure time in spec between 1.5ms – 1.9ms per http://oregonfuelinjection.com/pdf/gm-6.5-EFI-diagnostic.pdf
Watching the fuel rate mm3 I can see that WOT will put it up in the 70's and as RPM's get higher the rate keeps dropping. At WOT 2nd gear it will tack out ~3100 rpm and fuel rate will be down around 60 and not change even if you vary the pedal between 3/4 and the floor. Slowly releasing the pedal the rate does not change until you back off enough to shift to 3rd, RPM's drop and the rate will go back up and start to decrease againg as you approach 3000 RPM.
What is going on??
Can anyone tell me if the Fuel rate being displayed in the Auto Enginuity tool is a measure of actual fuel rate being deliverd or is a rate the computer is commanding the pump to deliver?
If it is a commanded rate then it appears to me that my problem is something giving the computer bad data and it is defueling because of it.
2000 GMC K3500 6.5 Diesel has lost all power over ~2200 rpm. Started doing this the other day.
taking off from a stop you can feel the power start dropping off a little before it shifts to 2nd and sometimes a fishbite or 2
2nd gear if you put it down WOT it will get stuck there and wind up to ~3000 RPM and not shift till you backoff the pedal
if you set the cruise and hit even a small hill it will downshift to 3rd, RPM's jump and speed keeps dropping.
Only way to maintain Hwy speed is in OD being careful not to let it downshift. Keeping it under ~2200 RPM.
Here is what I have checked and have made no imporovement, WHAT AM I MISSING????
No SES light or any current codes. Can sometimes get one for over-boost with the TMaster, have since dialed it back to max at 8-10 PSI boost pulling my trailer never had a powerloss like this before even when it coded for over-boost.
Pulled the Lift pump and blew air back to tank to possibly clear the sock. Ran outlet side to a clear line into a bucket. Appears to be good flow, nice solid stream through the 3/8 line and no air bubbles seen.
Clear line on the IP inlet - No Air bubbles seen while driving.
Fuel Pressure at water drain: key on builds to 5-6 PSI. Driving it maintains ~5.5 PSI all the time including during the defuel event
Not seeing any pressure on the return line outlet. Blew air back to tank
Put in a new WIX fuel filter
Had a helper last night so I had him drive so I could watch the laptop better.
TDCO -1.5 something
Timing Actual & desired follow each other closely
IAT's under 180
Max Boost ~23 minus 15 at startup = 8 PSI about what the guage on the pillar pod reads
Fuel solenoid closure time in spec between 1.5ms – 1.9ms per http://oregonfuelinjection.com/pdf/gm-6.5-EFI-diagnostic.pdf
Watching the fuel rate mm3 I can see that WOT will put it up in the 70's and as RPM's get higher the rate keeps dropping. At WOT 2nd gear it will tack out ~3100 rpm and fuel rate will be down around 60 and not change even if you vary the pedal between 3/4 and the floor. Slowly releasing the pedal the rate does not change until you back off enough to shift to 3rd, RPM's drop and the rate will go back up and start to decrease againg as you approach 3000 RPM.
What is going on??
Can anyone tell me if the Fuel rate being displayed in the Auto Enginuity tool is a measure of actual fuel rate being deliverd or is a rate the computer is commanding the pump to deliver?
If it is a commanded rate then it appears to me that my problem is something giving the computer bad data and it is defueling because of it.
