Sudden TLC death - turns over but won't start (2 Viewers)

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Joined
Dec 20, 2018
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Sapphire, NC
Greetings all. I'm an original owner of a '99 TLC, now sporting about 378,000 miles. I've done most of the maintenance over the years, including the timing belt, and have been helped by the fact that it's been the most reliable and best vehicle I've ever owned. It doesn't burn oil, the heads have never been off, a set of tires lasts 90k miles, and it's pretty much in (slightly beat up) original configuration. I love this vehicle.

It's ALWAYS started when I turned the key, except for a couple of typical starter motor issues over the years. This time, it's different. It was running perfectly when I last drove/parked it about a week ago, but now will only turn over and shows NO sign of starting. Fuel is at about 5/8ths and fresh; I'm looking for good ideas where to start looking for problems that would cause such a sudden death.

One suggestion has been the crankshaft position sensor - not sure if that's a typical failure point that would case this type of problem, and if it's the first place I should investigate or if there's something more likely.

I'll take all the advice I can get, thanks.
 
What about the relay in the under-hood fuse box?
 
The problem is that the factory pump will work intermittently in the early stages of failure.
Let it sit overnight and try it again...if it fires right up, it's probably the fuel pump in early stage failure.
I just swapped mine with a cheapo to confirm then replaced with a nicer one once confirmed.
How old is the fuel filter?
 
Waited over 5 days (was out of town) before trying to start again, to no avail. Fuel filter is years old, but am thinking it wouldn’t cause sudden death. Fuel pump has never been replaced, and is apparently a known point of failure. Have looked at pump replacement videos on YT and it looks pretty straightforward. Short of replacing pump to see if problem is fixed, and other (simple?) way to determine if that’s really the problem, any other advice? If not, then I’ll go ahead with the replacement if for no other reason than after 25+ years it’s probably due.
 

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