Vehicle won’t start after a deep freeze with temps in the single digits.

[Gmolds66]

Make

Ford

Model

F150 2wd

Year

2003

Miles

114k

Engine

5.4 L CNG

Hello everyone,
I’m back once again with a new problem. I have a CNG truck that won’t start. It cranks but won’t turn over. The battery is fully charged and when I spray starting fluid in the intake it runs until the starting fluid is consumed. I did check the fuse for the fuel relay and it’s ok.

I think that the fuel system might have ice in it preventing fuel flow based on some on line info that I found but I’m not sure. Since the components on this system are different as compared to a gasoline fuel system I’m hesitant to work on it.

Any help with suggestions of things to check and or do would be greatly appreciated. Thanks!

 

[grcauto]

More than likely if they have a problem with icing it'll be in one or two specific areas. One area that is always suspect in gas is the filter. Not that it's plugged but due to it being a large pond in the river (fuel line) and water will accumulate there. Also at elbows in the pluming.

 

[Gmolds66]

Thanks for the suggestions, I will look further into those areas as a future preventative maintenance measure. Hopefully the slightly warmer temperatures (47 degrees on Thursday) here on the east coast will be enough to thaw the system. Thanks again!

 

[Mikerizer]

I had a truck that no matter what I did, it was very difficult to start in cold weather...to the point that I once thought it had jumped timing. I started putting a bottle of HEET in it with every fill-up, and that solved my problem. Like grcauto suggests, my problem was water/ice in the fuel system.