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03-14-2018, 12:15 AM
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#1
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New Member
Join Date: Mar 2018
Posts: 1
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1999 Bluebird Bus International T 444 E
Dead Accelerator Petal
Ran fine last time it was driven. now it starts but does not have any petal just idles well.
Would it have anything to do with oil ??
Someone told me the injector pump relied on oil quality.
Dont really know where to start on this ,
Thank you william
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03-15-2018, 03:58 PM
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#2
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Bus Nut
Join Date: Dec 2017
Posts: 973
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Quote:
Originally Posted by wlrogers
Dead Accelerator Petal
Ran fine last time it was driven. now it starts but does not have any petal just idles well.
Would it have anything to do with oil ??
Someone told me the injector pump relied on oil quality.
Dont really know where to start on this ,
Thank you william
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Throttle linkage? See if can rev it at the engine...sounds like a broken cable
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03-15-2018, 04:18 PM
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#3
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Bus Geek
Join Date: May 2016
Location: Eastern WA
Posts: 6,401
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
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I am not sure about 1999 but I know that later T444e's had an electronic throttle. I have seen the throttle pedal fail causing the symptoms you described. When it happened it threw a SES light and code.
Is your service engine soon light on?
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03-15-2018, 07:28 PM
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#4
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Bus Nut
Join Date: Dec 2017
Posts: 973
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Quote:
Originally Posted by PNW_Steve
I am not sure about 1999 but I know that later T444e's had an electronic throttle. I have seen the throttle pedal fail causing the symptoms you described. When it happened it threw a SES light and code.
Is your service engine soon light on?
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So you're sending a signal to a computer when you work the accelerator? So, like a rheostat?
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03-15-2018, 08:58 PM
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#5
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Bus Crazy
Join Date: Oct 2017
Location: Ashtabula, Ohio
Posts: 1,494
Year: 1996
Coachwork: Thomas
Chassis: International
Engine: T444E 7.3L
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Sounds like the electronic throttle pedal failed.
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03-15-2018, 08:59 PM
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#6
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Bus Geek
Join Date: Mar 2011
Location: Houston, Texas
Posts: 8,462
Year: 1946
Coachwork: Chevrolet/Wayne
Chassis: 1- 1/2 ton
Engine: Cummins 4BT
Rated Cap: 15
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I HATE fly-by-wire!
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03-15-2018, 09:13 PM
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#7
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Bus Geek
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,758
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
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is this a rear engine bus by chance? if so make sure the "rear throttle" switch (if one exists) isnt turned on... if it is then the throttle pedal is disabled... the switch would be in the engine compartmnent of a rear engine bus..
id the throttle poedal has failed most likely youll see a WARN ENGINE light on your dash lit..
-Christopher
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03-15-2018, 09:21 PM
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#8
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Bus Nut
Join Date: Dec 2017
Posts: 973
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Quote:
Originally Posted by Johnny Mullet
Sounds like the electronic throttle pedal failed.
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I guess so...could you run a computer diagnosis then?
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03-16-2018, 06:24 AM
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#9
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Bus Crazy
Join Date: Oct 2017
Location: Ashtabula, Ohio
Posts: 1,494
Year: 1996
Coachwork: Thomas
Chassis: International
Engine: T444E 7.3L
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Quote:
Originally Posted by Jdawgsfanasty
I guess so...could you run a computer diagnosis then?
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A proper scan tool would show a code and/or show you the PID data to see if the pedal has a signal from 0-100%
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03-16-2018, 07:23 AM
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#10
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Bus Crazy
Join Date: Dec 2015
Location: pa
Posts: 2,498
Year: 98
Coachwork: 1. Corbeil & 2. Thomas
Chassis: 1 ford 1998 e350 4x4 7.3 2 mercedes 2004
Engine: 7.3 powerstroke & MBE906
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Why do you not think it is a door switch or something like that. Our bus will start and idle but the throttle does nothing if not all the criteria are met. Not so likely that the the throttle pot died unless you have rodents.
Good luck,
Later J
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03-16-2018, 08:56 AM
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#11
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Bus Geek
Join Date: May 2016
Location: Eastern WA
Posts: 6,401
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
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I have seen throttle pedal assembly failure. When I saw it, it did throw a code.
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03-16-2018, 10:54 AM
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#12
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Bus Crazy
Join Date: Aug 2014
Location: SW New Hampshire
Posts: 1,334
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Quote:
Originally Posted by Tango
I HATE fly-by-wire!
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I know what you mean. I have a similar queasy feeling in the pit of my stomach about fly-by-40-feet-of-pneumatic-tubing.
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03-16-2018, 11:05 AM
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#13
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Bus Geek
Join Date: Sep 2017
Location: Owasso, OK
Posts: 2,627
Year: 1999
Coachwork: Thomas
Chassis: Saf-T-Liner MVP ER
Engine: Cummins 6CTA8.3 Mechanical MD3060
Rated Cap: 46 Coach Seats, 40 foot
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Quote:
Originally Posted by dan-fox
I know what you mean. I have a similar queasy feeling in the pit of my stomach about fly-by-40-feet-of-pneumatic-tubing.
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Mine works well.
The only issue I have had is that if the aux. air-tank is completely empty when you start the engine, you have no throttle until it builds a little pressure.
It's not really been a problem.
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03-16-2018, 11:49 AM
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#14
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Bus Nut
Join Date: Feb 2018
Location: Tahoe
Posts: 513
Year: 1997
Coachwork: International
Chassis: 3000RE
Engine: T444E w/ MT643
Rated Cap: 84 pass, 40'
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Quote:
Originally Posted by Twigg
Mine works well.
The only issue I have had is that if the aux. air-tank is completely empty when you start the engine, you have no throttle until it builds a little pressure.
It's not really been a problem.
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When I was attempting to get my bus in my driveway (took four tries) I had to pause twice to let my air pressure build back up because I had been braking so much while maneuvering. I didn't have any issues braking as advised (get to speed, brake to 5-10 below, stop braking til at speed again) down a several mile stretch of mountain getting the bus home (I also downshifted though). Could this indicate an issue with my compressor? Or do I just need to learn how to park? Was I braking too hard? The air brakes pass the pre trip inspection protocol.
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__________________
middle aged mom on a learning adventure
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03-16-2018, 11:56 AM
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#15
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Bus Geek
Join Date: May 2016
Location: Eastern WA
Posts: 6,401
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
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Quote:
Originally Posted by dan-fox
I know what you mean. I have a similar queasy feeling in the pit of my stomach about fly-by-40-feet-of-pneumatic-tubing.
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On my last bus (rear engine) I convertred from mechanical throttle to air throttle. I loved it.
That's one of the reasons why we build skoolies. So we can choose what suits us personally. Not have to live with what someone else thinks we need.
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03-16-2018, 04:10 PM
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#16
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Bus Geek
Join Date: Sep 2017
Location: Owasso, OK
Posts: 2,627
Year: 1999
Coachwork: Thomas
Chassis: Saf-T-Liner MVP ER
Engine: Cummins 6CTA8.3 Mechanical MD3060
Rated Cap: 46 Coach Seats, 40 foot
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Quote:
Originally Posted by 2martins
When I was attempting to get my bus in my driveway (took four tries) I had to pause twice to let my air pressure build back up because I had been braking so much while maneuvering. I didn't have any issues braking as advised (get to speed, brake to 5-10 below, stop braking til at speed again) down a several mile stretch of mountain getting the bus home (I also downshifted though). Could this indicate an issue with my compressor? Or do I just need to learn how to park? Was I braking too hard? The air brakes pass the pre trip inspection protocol.
Sent from my XT1585 using Tapatalk
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They are probably fine. It's not how hard you press the pedal that matters, but the number of times in succession that you press it.
In tight manoeuvering, I can see the air getting low, at least until you get used to it.
If the pressure is building to around 120 psi, and holding there over several minutes, then brakes are probably fine.
Mine stays aired-up for weeks, and I don't think that's unusual.
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03-17-2018, 08:19 AM
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#17
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Bus Geek
Join Date: May 2009
Location: Columbus Ohio
Posts: 18,758
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
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its easy when m,aneuvering to press the pedal harder than you need to. which uses more air.. I find im barely touching my pedal when im maneuvering my bus around and my air stays above 100.. if I press down hard each time I go from to R to D ot such. then I use much more air.. my system has the 3-in-1 tank which is Low storage capacity.. busses with 3 separate tanks tend to have more reserve air from what ive seen.
definitely repeated pedal presses deplete air quickly as noted.. plus at idle the compressor is spinning slower and doesnt pump as fast.
-Christopher
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