No Throttle No codes

jkolewski

New member
Sep 26, 2023
2
0
1
Jackson, MI
2017 L5p
Fully deleted for 30k
130k on truck
The truck starts fine. It started having no throttle response. I could turn it off then restart and it would go away.
I cleaned the MAS
Changed a glow Plug ( only code it was throwing, gone now)
Changed fuel filter
No Codes
With HP tuners hooked up it shows accelerator position as accurate. The actual throttle position stays @ 0
Not sure how it goes (not very well but goes)
It has good fuel pressure.
Pedal???
I'm not finding much on the interweb
Thanks for the help!
 

kidturbo

Piston Tester
Jul 21, 2010
2,532
1,357
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Somewhere On The Ohio
www.marinemods.us
Look for pids under APPS. Those be the name of raw sensor voltage data. Should have apps1 & apps2. One sweeps low to hi voltage, other exact opposite. If those are out of spec at key-on the engine will have no throttle response.

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jkolewski

New member
Sep 26, 2023
2
0
1
Jackson, MI
Thanks for the reply. It took me a minute to find the pids.
pos. A starts at .94 V no throttle
pos. B starts at .47V no throttle
pos. A 4.10 full throttle
pos. B 2.08 full throttle
accelerator pos 99%
TPS 0 Does the diesel not have tps?

Still back to the same problem. Pedal down = nothing/ almost nothing
No codes
Idle high as well
 

2004LB7

Well-known member
Dec 15, 2010
6,950
2,130
113
Norcal
As mentioned above, one should be low and go high. The other should be high and go low. Looks like something is wrong with yours
 

kidturbo

Piston Tester
Jul 21, 2010
2,532
1,357
113
Somewhere On The Ohio
www.marinemods.us
I'm not positive on that sweep for l5P. But will take a look at an lmm in a few for comparison. If it shows 0% 99% in the data, then it's working. No they do not use TPS on the diesels.

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