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Old 10-15-2006, 09:30 PM   #11
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Location: Clearlake, Northern California
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Year: 1992
Coachwork: Blue Bird
Chassis: TC-2000 Frt Eng, Tranny:MT643
Engine: 5,9 Cummins
Rated Cap: 84
Right, the white wire is probably for the tach. The tach does not work, so...
(Anybody know what redline is supposed to be for a MV404?)

Let's see... It is the #1 cylinder I have trouble with. Oh yes, I have spark there --
ouch! But it seems like I have good spark some times and other times not.
Hard to say. We ran the "kill-one-cylinder-at-the-time" test on the scope and it
showed no RPM drop on #1 each time.

I think we are down to an invisible flaw in the cap as the most likely suspect.
(Or the mouse nest!) I'm going "to town" tomorrow (Sacramento) so I'll get parts
there. Rechecking the vacuum advance, I found that it leaks a little bit, so I'll
replace that too.

I can get a MSD 6A "box" right here in Clearlake for $200,40 out the door.
I suppose that might "cover up for" various other weaknesses that might exist
in a 1981 engine.

Will be gone for a week. Appreciate any ideas you guys might have in the meantime!
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Old 10-16-2006, 05:43 AM   #12
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I'm also a huge fan of the MSD 6A. It's one of those things that shows up more on the "seat of the pants dyno" than anywhere else. My 392 has a petronix aftermarket electronic ignition, seems to work fine.
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Old 10-20-2006, 08:03 PM   #13
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Year: 1993
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Engine: DT466/MT643
Rated Cap: 77
Check the compression...I'd bet money #1 will have little or none.
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Old 10-22-2006, 11:15 PM   #14
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Join Date: Oct 2005
Location: Clearlake, Northern California
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Year: 1992
Coachwork: Blue Bird
Chassis: TC-2000 Frt Eng, Tranny:MT643
Engine: 5,9 Cummins
Rated Cap: 84
Quoting myself:
Compression is 120, just like the others.
How much money did I win?
I'm home from a week on the road and I have bought $400 worth of
ignition parts, including a 6A. Stand clear!
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Old 10-23-2006, 05:56 AM   #15
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Quote:
Originally Posted by Elliot Naess
. . . and I have bought $400 worth of ignition parts, including a 6A. Stand clear!
I know it will take longer to do it but, if you replace those ignition parts one at a time and check the result, you can determine exactly which component caused the problem, and I, for one, would like to know what the actual fix was.
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Old 10-23-2006, 10:57 AM   #16
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Wow all that money for ignition

Do they still make gas engines for buses??? I'm convinced that diesel is the only engine power. I'm gonna get a diesel powered lawn mower. Ahhh yes the smell of diesel on an early autum morning. The work is about to begin... Frank in Idaho.... no smog rules
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Old 10-23-2006, 12:42 PM   #17
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My only diesel is my mower and yes the smell does make it more enjoyable!
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Old 10-23-2006, 01:17 PM   #18
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Join Date: Oct 2005
Location: Clearlake, Northern California
Posts: 2,116
Year: 1992
Coachwork: Blue Bird
Chassis: TC-2000 Frt Eng, Tranny:MT643
Engine: 5,9 Cummins
Rated Cap: 84
The really funny part is spending $400 for ignition parts -- on a $250 bus!
Of course, I spent $2209.40 on tires!
Long term, the tires can go on a newer bus, and the "hot rod" ignition parts
on my street roadster or an other car. I consider this old gasser my
"practice bus", while I keep an eye out for a bargain on a 40 foot Bluebird TC2000
with diesel engine.
Now I need to get out there and work on it -- going on a trip Thursday!
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Old 10-23-2006, 07:49 PM   #19
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$400 for ignition parts on an International Gasser?? Holy cow!! For that, you couldve had fuel injection. Question is, did that take care of your problem?

For some info on IH gassers and on some of the diesels, try http://www.binderbulletin.org
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Old 10-23-2006, 09:38 PM   #20
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Re: Wow all that money for ignition

Quote:
Originally Posted by frank-id
Do they still make gas engines for buses??? I'm convinced that diesel is the only engine power. I'm gonna get a diesel powered lawn mower. Ahhh yes the smell of diesel on an early autum morning. The work is about to begin... Frank in Idaho.... no smog rules
Ah..the smell of ether and the words of frustration on a cold morning when your lawn mower's block heater fails to start it.

As for the fuel injection...sure he could have had it, but that doesn't fix a weak spark if that was in fact the problem.

I know it's a long ways away from you, but the guy who does the bus sales at United Truck Body (where I bought mine) in Duluth came into our store a few days ago and said they have some real nice ones coming in. One is a 72 pass. TC2000 with a 5.9, air brakes, MT643 (IIRC), 4.44 ratio, and a host of other goodies. It was always stored in a heated bus barn. No block heater on that one and we're darn near in the tundra up here. Best part was the price...$2700....

You can try their site, but I'm not sure that it has been updated. Either way, don't pay attention to the prices. Mine was listed at $2000 and I paid $1250 without any negotiaion.

http://www.unitedtruckbody.com[/quote]
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