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Topic: Engine starts for 30 seconds then dies (Read 467 times) previous topic - next topic

Engine starts for 30 seconds then dies

Trying to start it for the first time since the freeze. Antifreeze is good and rated for enough so it did not freeze. I start it and it fires right up then thirty seconds later shuts down. Any advice?
1992 Silver Anniversary Unihome 4000
WTBA. 350 hp Detroit, Allison HT 746
Build number 4022

Re: Engine starts for 30 seconds then dies

Reply #1 –
System has air? Overheating and sensor shuts it down? Also if it thinks the system is low it will shut down

If the coolant system is the only thing touched then that would be what I would guess is the issue.. If not Air in the fuel lines

Re: Engine starts for 30 seconds then dies

Reply #2 –
The 6V92 has a coolant level sensor at the top of the radiator. Pop the radiator cap and check/add antifreeze as needed to top it off. Over winter the antifreeze may have dropped just enough to go below the sensor.

Also check your overflow tank. If this is empty your radiator would have drawn in air the last time the engine ran and cooled off.
Peter and Tammy Fleming
1991 U300 GV 40 - Sold, owned for 4 years
Downsized to Roadtrek Popular 210 class B

Re: Engine starts for 30 seconds then dies

Reply #3 –
Look at the black tank on the right as you open the engine door. There is a window showing the level and a sensor there. If the coolant level falls below the sensor, the DDEC shuts down the engine. Do you have two fans or one. A late 92 will have two fans and a horizontal radiator. The early 1992s have a vertical radiator and one fan and have a cap on top of the radiator.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Engine starts for 30 seconds then dies

Reply #4 –
Failed coolant level sensor
Scott
 

Re: Engine starts for 30 seconds then dies

Reply #5 –
It was the low coolant issue, thanks for the help
1992 Silver Anniversary Unihome 4000
WTBA. 350 hp Detroit, Allison HT 746
Build number 4022