Reply
 
Thread Tools Display Modes
 
Old 08-23-2018, 06:09 PM   #1
Mini-Skoolie
 
Join Date: Nov 2016
Posts: 21
Bus wont start

2002 thomas safety bus

So it's been a while since I started the bus last, kind of took the summer off from the build. So its probally been a month since i ran her last and now today i go to start her and she cranks but wont start battery is fully charged. I'm in no way a mechanic and was wondering if there anything obvious i check for before i go and call a mechanic to come out here and try and figure it out. It's in neutral all emergency exits are closed nice and snug. Any ideas fellow bus people??
Kdebo is offline   Reply With Quote
Old 08-23-2018, 06:20 PM   #2
Bus Geek
 
Join Date: May 2016
Location: Eastern WA
Posts: 5,622
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
Does it crank and not start or fail to crank?
PNW_Steve is online now   Reply With Quote
Old 08-23-2018, 07:20 PM   #3
Mini-Skoolie
 
Join Date: Nov 2016
Posts: 21
It cranks but fails to start
Kdebo is offline   Reply With Quote
Old 08-23-2018, 07:40 PM   #4
Site Team
 
Johnny Mullet's Avatar
 
Join Date: Oct 2017
Location: Ashtabula, Ohio
Posts: 1,238
Year: 1996
Coachwork: Thomas
Chassis: International
Engine: T444E 7.3L
What engine is in it? Fully charge the batteries and crank on it for 10 second intervals giving the starter a break between cranks. Maybe lost it's fuel prime depending on engine.
Johnny Mullet is offline   Reply With Quote
Old 08-23-2018, 08:07 PM   #5
Mini-Skoolie
 
Join Date: Nov 2016
Posts: 21
It's got a cat 3126 I'll give that a shot tommorow
Kdebo is offline   Reply With Quote
Old 08-23-2018, 08:24 PM   #6
Bus Geek
 
Join Date: May 2016
Location: Eastern WA
Posts: 5,622
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
Quote:
Originally Posted by Kdebo View Post
It cranks but fails to start
Somehow I overlooked that in your original post. Sorry 'bout that.

Did anything else change? New fuel filters etc?
PNW_Steve is online now   Reply With Quote
Old 08-23-2018, 08:26 PM   #7
Mini-Skoolie
 
Join Date: Nov 2016
Posts: 21
No nothings changed the bus has literally been sitting in my backyard for about 3 months now. I'm kind of getting the feeling I might have done critters causing damage maybe
Kdebo is offline   Reply With Quote
Old 08-23-2018, 08:33 PM   #8
Bus Geek
 
Join Date: May 2016
Location: Eastern WA
Posts: 5,622
Year: 2002
Coachwork: Bluebird
Chassis: All American RE (A3RE)
Engine: Cummins ISC (8.3)
Rated Cap: 72
Hmmm...

A diesel engine needs air, fuel and compression to start.

I can't conceive what could keep it from getting air. A sudden loss of compression from sitting idle seems unlikely. That leaves fuel.

As yours is an electronic engine it could be either an interruption in the fuel supply or an electrical/computer problem in the fuel injection.

Not being very well versed in CAT engines I will defer to our resident CAT guru's. Where would you be looking for fueling issues on this engine?
PNW_Steve is online now   Reply With Quote
Old 08-23-2018, 09:00 PM   #9
Bus Crazy
 
Join Date: Jun 2013
Location: Picton,Ont, Can.
Posts: 1,772
Year: 1997
Coachwork: Bluebird
Chassis: GMC
Engine: Cat 3116
Rated Cap: 72
No guru and not familiar with these engines. This is a common issue when diesels sit idle for months. I agree with the priming because the high pressure pumps have internal check valves that sometimes leak or stick from sitting. Filtered diesel can be dirty too when it sits and doesn't get burned. That dirt affects the operation of that pump. Also check water separator before trying again and drain. Charge the batteries up good, you been taking them down trying.


John
__________________
Question everything!
BlackJohn is offline   Reply With Quote
Old 08-23-2018, 09:04 PM   #10
Mini-Skoolie
 
Join Date: Aug 2018
Posts: 16
When you're cranking it over watch to see if you got a little bit of white smoke and if you are it should smell a bit like diesel that means you're getting fuel and if it won't start you need to start looking at whether or not the glow plugs are getting power the CAT engine is a glow plug engine and sitting can build up little bit of corrosion on the relay contacts what do a little bit of research into how to diagnose glow plugs for your motor there's lots of info out there on them and it is a fairly simple electrical circuit
__________________
01 Freightliner 24 valve Cummins
Brad199 is offline   Reply With Quote
Old 08-23-2018, 10:10 PM   #11
Bus Geek
 
EastCoastCB's Avatar
 
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 19,056
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
The 3126 has an intake grid heater.
__________________
.
Roll Your Own Build Thread
EastCoastCB is offline   Reply With Quote
Old 08-24-2018, 07:46 AM   #12
Bus Nut
 
Join Date: Feb 2014
Location: Cuyahoga Falls Ohio
Posts: 530
Year: 1997
Coachwork: Startrans
Chassis: Ford e-350 single wheel
Engine: 5.4 litre
Rated Cap: 12
Maybe a little starting fluid with cylinder lube.
leadsled01 is offline   Reply With Quote
Old 08-24-2018, 08:46 AM   #13
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 12,132
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
Quote:
Originally Posted by leadsled01 View Post
Maybe a little starting fluid with cylinder lube.
NO!!!!!!!!!!!!


starting fluid with a grid heater can cause a nice little explosion out the intake tube.....



my guess is that the HPOP probably drained down and now its haviong to be cranked forever to fill it up so the injectors will fire..


-Christopher
cadillackid is online now   Reply With Quote
Old 08-24-2018, 12:30 PM   #14
Site Team
 
Johnny Mullet's Avatar
 
Join Date: Oct 2017
Location: Ashtabula, Ohio
Posts: 1,238
Year: 1996
Coachwork: Thomas
Chassis: International
Engine: T444E 7.3L
That CAT should have a primer pump on top of the fuel filter. Pump it until it's hard. Crank. Repeat.
Johnny Mullet is offline   Reply With Quote
Old 08-24-2018, 02:47 PM   #15
Bus Nut
 
Whatthefak's Avatar
 
Join Date: Apr 2018
Location: Wisconsin N.E.
Posts: 409
Year: 2000
Coachwork: Thomas
Chassis: Thomas
Engine: 5.9
Rated Cap: 72
I had a crank but no start on my 3126 turned out to be the ecm

Turning the ignition on from the back I could watch the diagnostic lights

With mine I could crank forever and got no fuel smell at the exhaust
Whatthefak is offline   Reply With Quote
Old 08-24-2018, 05:33 PM   #16
Bus Geek
 
EastCoastCB's Avatar
 
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 19,056
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
Quote:
Originally Posted by Johnny Mullet View Post
That CAT should have a primer pump on top of the fuel filter. Pump it until it's hard. Crank. Repeat.
Yep they have a NICE primer pump, conveniently located and oriented!
__________________
.
Roll Your Own Build Thread
EastCoastCB is offline   Reply With Quote
Old 08-24-2018, 09:46 PM   #17
Bus Geek
 
Tango's Avatar
 
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
...unlike Cummins. Most of which are a beotch to get to and pump!
Tango is offline   Reply With Quote
Old 08-25-2018, 10:00 AM   #18
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 12,132
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
or some of the 466E's which apparently were void of a primer pump.. oh and my 444E which is void of a primer pump.. you have to keep pulling the lid off the fuel filter and pouring it full, start it, it dies.. fill it again, start it.. till it pulls its own fuel..



my DT360 has a primer pump that works great..


my 392 is gas so just dump gas in the carb and crank
-Christopher
cadillackid is online now   Reply With Quote
Old 08-25-2018, 09:09 PM   #19
Skoolie
 
Marceps's Avatar
 
Join Date: Aug 2016
Posts: 120
Year: 1999
Coachwork: Thomas
Chassis: Saf-T-Liner MVP ER
Engine: CAT 3126
Do any buzzers sound?
Does the engine bay's manual override succeed in starting the bus?
What are the air pressure levels when you try to start the bus?
What color do each of the LED indicators show on the braking systems' electronic controller? (See 8.24 of the service manual.)
Marceps is offline   Reply With Quote
Old 08-29-2018, 04:54 PM   #20
Mini-Skoolie
 
Join Date: Apr 2016
Posts: 17
I own a 2001 Thomas with a cat 3126! If you hold down cruise control when you turn the key to on (not starting yet) it will blink the check engine light and give you any codes from the computer. Check internet for more info. Mine gave an error about the first actuator when I couldn't start but a mechanic told me that could just be lack of fuel. So, I go to on twice to double prime it and if that doesn't do it, I it hit it some ether.

Note: I am not a mechanic. While I've never blown it up the comment about the intake heater makes me want to learn more.
SilverSchooler is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:36 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×