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baptistbusman
Advanced Member
USA
301 Posts |
 Posted - 09/24/2007 : 7:38:24 PM
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I know I remember ready a thread about this ages ago, but I can't find it anywhere.
On our 91 TC2000, the only decent TC have owned, It runs really rough after being started. You can hit the throttle, it'll rev-up and then it'll drop down and almost die, then will start running rough again. After it's been running a few minutes it's ok.
It has always done this, was always worse in the winter, but now it's getting to be a lot worse, even when the temp is in the 90's.
The fuel filter is totally new, there is no air in the fuel system. Is this a lift pump problem?
Oh yeah by the way, our bad luck with TC's continued this week with this very bus. A driver had it out in the city, and it blew 2 brake lines. Also while inspecting that problem, I noticed the exhaust pipe was broken in half right behind the turbo pipe. Out of the 8 TC's we have owned, this is the 4th to blow out the brake lines, and the 2nd to have the exhaust break next to the turbo pipe. |
Edited by - baptistbusman on 09/24/2007 7:48:57 PM
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Wolf0r
Top Member
USA
2181 Posts |
Posted - 09/25/2007 : 06:21:15 AM
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| Check the brace that holds the turbo pipe to the trans adapter. If its cracked replace it too. Typical bluebird problem. You can get that stuff cheap. |
“The good thing about science is that it's true whether or not you believe in it.”
Neil deGrasse Tyson |
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L.J.D
Senior Member
United States
173 Posts |
Posted - 09/25/2007 : 06:28:21 AM
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check the throttle lever on the inj pump they wearout all the time what pump is on the bus is it the old rotary style or an inline
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L.J.D
Senior Member
United States
173 Posts |
Posted - 09/25/2007 : 07:34:54 AM
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| also forgot tomention before the idle screws sometime beed to be adjusted the tops of them get worn down causing the low idles and stumble |
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baptistbusman
Advanced Member
USA
301 Posts |
Posted - 09/25/2007 : 10:21:16 AM
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| This has the inline injector pump. |
1 Timothy 1:15 This is a faithful saying, and worthy of all acceptation, that Christ Jesus came into the world to save sinners; of whom I am chief. |
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IBTMech
Top Member
USA
973 Posts |
Posted - 09/25/2007 : 5:24:11 PM
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| Have you checked the supply pump pressure? With an inline pump it should be 15-20 psi. I'm not familiar with the system, but there could be a damaged check valve in the system, probably in the supply pump. |
If it doesn't fit, FORCE it.
If it breaks, well, it needed replacing anyway.
Pullin' wrenches for 45 years. |
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thomasguy
Active Member
Canada
21 Posts |
Posted - 10/16/2007 : 12:09:38 PM
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| I agree with the check valve being the possible problem. You're losing your fuel prime over-night draining back to the fuel tank. |
School Bus Maintenance & Repairs.
http://schoolbusmechanic.blogspot.com |
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91 5.9 Cummins
