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02-04-2023, 07:42 PM
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#1
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Junior Member
Join Date: Nov 2021
Posts: 12
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No throttle response
Here's a new one on me. I have a 2000 DSDP w/Cumins ISC & Spartan chassis. Today I fired it up to give it some exercise. After idling about 15 min. I gave it some throttle, no response. I popped the brakes on & off and got the throttle to respond for a few seconds then back to no response.
I then released the parking brakes and managed to get full authority.
How and why does the air pressure in the parking brake side of things effect the throttle response? I don't understand period.
Waiting on spring weather in South Mississippi....
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02-04-2023, 10:17 PM
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#2
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Senior Member
Join Date: Dec 2019
Location: Canyon Lake, Texas
Posts: 2,478
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I think it was a glitch. You should have full throttle control always.
__________________
2002 American Tradition 40'
Cummins 8.3, Banks 431hp, 1260 tq
Canyon Lake, TX
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02-05-2023, 08:04 AM
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#3
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Senior Member
Join Date: May 2021
Location: Brenham, Texas
Posts: 1,512
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Quote:
Originally Posted by travlin
Here's a new one on me. I have a 2000 DSDP w/Cumins ISC & Spartan chassis. Today I fired it up to give it some exercise. After idling about 15 min. I gave it some throttle, no response. I popped the brakes on & off and got the throttle to respond for a few seconds then back to no response.
I then released the parking brakes and managed to get full authority.
How and why does the air pressure in the parking brake side of things effect the throttle response? I don't understand period.
Waiting on spring weather in South Mississippi....
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My coach actually does what you are describing. I believe it’s a normal sequence until operating temps are achieved.
__________________
Eddie and Jomaye, Retired
2018 Newmar Ventana 4369
2021 Jeep 4 dr Wrangler
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02-05-2023, 08:33 AM
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#4
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Senior Member
Monaco Owners Club
Join Date: Jun 2014
Posts: 12,783
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Not sure on your coach/chassis
I have a 2002 Monaco that uses a Williams throttle assembly, there is a throttle position sensor TPS that can cause problems intermittently and/or fail.
https://mpparts.com/part/williams-13...y-wm540-131507
https://www.finditparts.com/products...-valves-131973
From memory there is a way to calibrate it, with the key on and engine off press the pedal to the floor 3 times. I've never had to do this so not sure if it works. Maybe someone in the Newmar forum can respond.
__________________
Jim J
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi
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02-05-2023, 10:42 AM
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#5
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Junior Member
Join Date: Nov 2021
Posts: 12
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This is the first time I have encountered this situation. The coach sat there and idled for about 40 minutes. Water temp was up to 160 and the tranny was over 100 and this still occurred. I thought that maybe it was an operating temp issue but at 160, that should have been long past.
While idling the rpm would increase to 1000rpm for a short time and then return to 800. That sounds to me like an auto that responds to a load from an a/c unit. I'm a little perplexed.
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02-05-2023, 10:49 AM
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#6
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,403
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I had a somewhat similar event happen once.
Shut the engine down, restarted, and all was normal!
__________________
Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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02-05-2023, 03:38 PM
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#7
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Senior Member
Newmar Owners Club
Join Date: Dec 2018
Location: North Carolina
Posts: 617
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If you add the year and model it sure would help get accurate answers
__________________
 2022 Newmar Dutch Star 4369
2018 Jeep JL Sahara Unlimited
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02-05-2023, 05:32 PM
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#8
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Junior Member
Join Date: Nov 2021
Posts: 12
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OP says 2000 DSDP (That's Dutch Star Diesel Pusher).
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02-10-2023, 05:37 PM
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#9
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Junior Member
Join Date: Nov 2021
Posts: 12
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Looks like this post died...
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02-10-2023, 05:49 PM
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#10
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Senior Member
Newmar Owners Club Freightliner Owners Club
Join Date: Aug 2021
Posts: 127
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My DS does the same thing until you place the transmission in gear. Then the throttle is responsive.
__________________
Wil, Donna, and Daisy
2020 Newmar Dutch Star 4081 (Freightliner)
2015 GMC Sierra Denali 2500 4x4
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