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Old 03-23-2024, 03:09 PM #1
KarlitosWay KarlitosWay is offline
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Exclamation 1999 SR5 - "Bonnie" - Crank, No start - need help

Currently having an issue where the engine will crank no problem but will not turn over or start. Here is the history of the issue:

2 weeks ago I noticed that it was having more laboured starts, it would take twice as much cranking to get the truck to fire up. Assuming the spark plugs were end of life, I replaced them. (I've already done the coils 35k miles ago). I started with no issue, and I ran it until warm then shut it down.

New day, went to start it, same laboured starting issue but ran no problem and after the truck was warm the issue didn't seem to persist.

Two days later, full crank but no start, and now thats where it is.

Here is everything I have checked:
- swapped the EFI relay to check for a failure
- Repeated everything with the spark plug install - no obvious problem signs on the new plugs
- Checked all the fuses in the engine and cab

NOTES:
- when the key is turned to ignition, I cannot hear the fuel pump start
- In park, with the key turned, the truck throw the code P0340
- Tried starting with starter fluid, with the plastic ducting off the intake manifold, tried to turn over and then shot white smoke out of the intake manifold... could be a timing / cam position issue?

Unsure if I should proceed by chasing the fuel pump as an issue or chase the Camshaft position sensor as an issue. Any guidance on where to do next would be super appreciated.
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Old 03-24-2024, 09:22 AM #2
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When I Google P0340 Toyota I get:

Code P0340 indicates there is a problem with the electrical wiring of the circuit attached to the camshaft position sensor. This issue can result in the display of a multitude of other codes that relate directly to your vehicle's camshaft. In addition, your powertrain control module (PCM) could also be damaged.

If it were me I would have it towed to a dealership or trusted local garage and get a good diagnosis. Then I would decide if it were something I could handle or not. If you have AAA you can get the tow there and back for free, probably. You'll owe the garage about an hour for diagnosis.

Others will chime in here and offer more/better advice, but that's what I would do. Good luck.
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Old 03-25-2024, 01:16 PM #3
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Two quick notes:

- The engine will not run without a sealed tube between the MAF sensor and the throttle body
- The fuel pump does not prime/run with the key in the "ON" position. It will only run while the key is in the START position or the engine is running.

If you are trying to do starting fluid, you need to pull the tube, spray, then reinstall the tube... Or spray it in a vent line or something like that.

In general, "turning over" is the term used for the starting moving the engine, not when the engine is running.

-Charlie
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Old Yesterday, 02:59 PM #4
KarlitosWay KarlitosWay is offline
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UPDATE:

Tried installing a new Cam position sensor, P0340 is cleared but it didn't affect the ignition at all. Still lots of cranking with no start.
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