Compression Ignition Addict
Join Date: Dec 2007
Thanked 233 Times in 224 Posts
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Has this just started with cold weather? This time of year, faulty Glow Plug Systems (that haven't been needed for many months) show-up. Are you sure everything is what it should be with the plugs & relay? Does this happen on a, warm, restart?
To test if it's fuel related, next time it dies like that, open the drain and see if there's the usual amount of fuel in the bowl.
As for the HPOP, you need a scanner that will monitor the ICP pressure. In fact, that would be the Best way to narrow stuff down. Have the right scanner (Not a generic OBD-II, they don't do it for us) connected and watch what's going on as it dies...