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Russianblue · #2 02-09-2026, 03:49 PM

wow! thanks for all the insight.

I think AI might be going off-piste here and making some conclusions here that are not particularly likely.

First off, this has ONLY happened in very cold weather...typically below 35 degrees. And it doesn't even happen every time.

i can tell when i have a no-start morning because when turn the key to position 2 I will hear NOTHING from the fuel pump. i can usually rectify that with 3-6 cycles of OFF to Position 2. I have to get two successful primes in a row to crank it in that situation though.

It seemed like an easy fix to me just replacing (first) the fuel pump in Jan 2025, after which i never had the issue because it never got cold after that. But the problem arose again this year the first time it got under freezing. And has been SOMEWHAT consistent on sub-freezing mornings.

So i figured i might be dealing with a flaky fuel pump relay. That'd make a ton of sense. I replaced that this weekend but the relay tested perfectly fine on the bench. I left the new one in there.

ChatGPT is pointing to the fuel filter/regulator but the pump seems like it can easily 'prime-through' an empty fuel rail for a successful start...provided it turns on at position 2. I ordered a new filter and will install next weekend but i am doubtful that's the issue.

i Don't know enough about relays to know if the one that 'tested good' on the bench was actually faulty. i just tested it with a 9V battery and a meter.

i'll read your thread to catch up on some of the work you guys have already done. Thanks!

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