starts but stalls

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starts but stalls

Postby czachary57 » 13 Jul 2016, 20:20

I have an M1152 that will start and run for about 10 seconds then cut off. While in process of troubleshooting we had figured out that there was MO gas in the system. We drained it and filled it back up with JP8 and ran it through system but it stalls after 10 seconds. Any ideas will be a huge help because the TM doesn't have anything thank you.
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Joined: 22 Mar 2016, 13:34

Re: starts but stalls

Postby USMC3529 » 14 Jul 2016, 18:35

1. For those 10 seconds, how did it run? Did it seem normal or rough?
2. Have you checked resistance IAW the TM for the glow plugs?
3. Have you checked the TPS?
4. Have you checked fuel pressure?
5. Have you checked for sediment buildup on all injectors?
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Re: starts but stalls

Postby Check-Flop » 28 Sep 2017, 06:27

Replace the fuel filter and clean out the Fuel-Water seperator to ensure there are no traces of any more mogas. Additionally, bleed out your injectors to ensure that the mogas is not in the lines as well.

Edited by Petz
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Joined: 01 Oct 2015, 08:14

Re: starts but stalls

Postby Petz » 24 Oct 2017, 15:53

Check-Flop, this is an old post. Likely CZachary57 has already solved the problem. I don't feel there is a need to bleed out the injectors as mogas will get flushed out by the JP8.

To add to USMC3529's post though, make sure you are checking the fuel flow as well. From to pump to the fuel water separator you should be seeing almost half a 20oz being filled with 5-10 seconds of cranking (disconnect 54A so it doesn't start and suck air into the injector lines). This checks that the mechanical fuel pump is working properly.
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