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Old 11-28-2020, 09:40 PM #1
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97 crank time before fire

Hello all,

I've been a 3rd gen owner for a week now and I can't find a fault with the truck I bought beyond a long crank.

I've read it's not uncommon at all, but it drives me nuts that it turns over 7 or 8 times (1.5-2.0 seconds) before it fires.

It seems to be SLIGHTLY faster when it's warm, but cycling the key to prime the pump has no effect when its cold. I don't think it's the pump, and I don't know enough about this model yet to know what other stuff I should be looking at? Any advice?

/e

I don't know yet how posting about FSM's here is accepted, but If anyone has a 1997 FSM I would be very grateful.

Last edited by Spruce_1984; 11-28-2020 at 09:42 PM.
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Old 11-28-2020, 10:11 PM #2
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Quote:
Originally Posted by Spruce_1984 View Post
Hello all,

I've been a 3rd gen owner for a week now and I can't find a fault with the truck I bought beyond a long crank.

I've read it's not uncommon at all, but it drives me nuts that it turns over 7 or 8 times (1.5-2.0 seconds) before it fires.

It seems to be SLIGHTLY faster when it's warm, but cycling the key to prime the pump has no effect when its cold. I don't think it's the pump, and I don't know enough about this model yet to know what other stuff I should be looking at? Any advice?

/e

I don't know yet how posting about FSM's here is accepted, but If anyone has a 1997 FSM I would be very grateful.
All normal. The fuel pump isnt enabled until the crank sensor senses the engine cranking.

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Old 11-28-2020, 10:52 PM #3
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Forget everything you thought was normal with an American vehicle. Including hot idle minimum oil pressure

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Old 11-28-2020, 11:13 PM #4
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lol, thanks guys. Anything I can do to get it to fire off the bat? Or should i just chalk it up and keep hunting down what I want in a lift?
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Old 11-28-2020, 11:32 PM #5
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lol, thanks guys. Anything I can do to get it to fire off the bat? Or should i just chalk it up and keep hunting down what I want in a lift?
Its factory spec for it to start in 1.5 or 2 seconds. All 5 of mine are this way. Keep hunting down what you want in a lift.

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Old 11-28-2020, 11:34 PM #6
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Quote:
Originally Posted by brillo_76 View Post
Its factory spec for it to start in 1.5 or 2 seconds. All 5 of mine are this way. Keep hunting down what you want in a lift.

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Done and done. I spent like 2 full weeks hunting this done in my last build and ended up replacing everything.

Thanks!
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Old 11-30-2020, 05:58 PM #7
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Originally Posted by Spruce_1984 View Post
lol, thanks guys. Anything I can do to get it to fire off the bat? Or should i just chalk it up and keep hunting down what I want in a lift?
Definitely stop worrying about it. Think of it as extra time for the engine to start circulating oil before the bearing see the load of combustion. The OEM starters are very reliable and easily fixed (contacts+plunger replacement) if there is a problem.

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Old 11-30-2020, 10:52 PM #8
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A long crank wouldn't be a starter issue would it? Unless it's a really slow first few cranks that speeds up.

My original engine would occasionally have a long crank when warm. Never did figure it out and when I replaced engines, the problem went away. Same ignitor, same ECU, same starter. Even same spark plugs, injectors and spark plug wires. Go figure.
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Old 12-01-2020, 07:48 AM #9
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It is about time to call in a top mechanic on site to check the vehicle. Doesn't sound like a major issue - so long as it starts in 5 cranks and runs fine.

What year is this 4runner?

I own a 2005 4runer with 150,000 miles and she starts up like when it was new. I have had to replace starters that failed (2). Everything else is OEM - alt.; WP; radiator.
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Old 12-01-2020, 08:23 AM #10
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Quote:
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A long crank wouldn't be a starter issue would it? Unless it's a really slow first few cranks that speeds up.

My original engine would occasionally have a long crank when warm. Never did figure it out and when I replaced engines, the problem went away. Same ignitor, same ECU, same starter. Even same spark plugs, injectors and spark plug wires. Go figure.
Long crank when warm is odd. Maybe you had a vaccuum leak when hot. As it had to be something in the engine itself that was causing it.

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Old 12-01-2020, 08:28 AM #11
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It is about time to call in a top mechanic on site to check the vehicle. Doesn't sound like a major issue - so long as it starts in 5 cranks and runs fine.



What year is this 4runner?



I own a 2005 4runer with 150,000 miles and she starts up like when it was new. I have had to replace starters that failed (2). Everything else is OEM - alt.; WP; radiator.
OP rig is a 1997 and in 3rd gens. The fuel pump is not switched on until the ECU senses rpm from the crank sensor. Cold starts 1.5 to 2 seconds is normal.

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Old 12-01-2020, 07:57 PM #12
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Based only on my own experience with 1 '97 3rd Gen 4Runner, a aging/weakening battery can extend the cranking time by a second or so.
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Old 12-02-2020, 04:03 PM #13
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Long crank when warm can also be a faulty injector. When cold, the engine gets more than required fuel to start, but when warm, it gets what it needs to run. A faulty injector deprives fuel to the chamber.
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Old 12-02-2020, 06:51 PM #14
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Having a bunch of issues with mine right now but even when it was running great it took a couple seconds to start so as far as I know it's normal
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