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Old 04-01-2021, 11:49 PM #1
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Starting Issue: Fuel?
My 99 started having long crank times before it would start. It only does this after it sat for a few hours or overnight. It starts normally when you turn the key to ON for 30 seconds or so before starting. There are no issues when driving or idling.

Does this sound like the regulator? My pump is a denso that was replaced almost two years ago, less than 20k miles on it so I am doubting it's that but not ruling it out.

Thanks
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Old 04-02-2021, 09:17 AM #2
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When you say longer cranks, about how many turns are we talking about?

Could be several different things but it is symptomatic of a fuel pump's anti-drain back valve allowing fuel to drain back into tank when sitting for longer periods.

What say others?
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Old 04-02-2021, 10:44 AM #3
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Quote:
Originally Posted by jgue467 View Post
When you say longer cranks, about how many turns are we talking about?

Could be several different things but it is symptomatic of a fuel pump's anti-drain back valve allowing fuel to drain back into tank when sitting for longer periods.

What say others?
About 2-3 seconds worth of cranking. There are times it won't turn over and I have to try a second time and it starts up right away.
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Old 04-02-2021, 10:52 AM #4
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Quote:
Originally Posted by Mudeprived View Post
About 2-3 seconds worth of cranking.
I think about 2 seconds is pretty normal for these trucks since the fuel pump doesn't engage until you've actually turned the key to ignition (rather than many other vehicles' fuel pumps that engage when the key reaches the ON position). (Somebody correct me if I'm wrong here.)


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Originally Posted by Mudeprived View Post
There are times it won't turn over and I have to try a second time and it starts up right away.

But yeah, it should start the first time.. Do you see this symptom only on cold starts after a night of sitting? Does it ever happen on warm starts?
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Old 04-02-2021, 11:36 AM #5
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Quote:
Originally Posted by cl4Rk View Post
I think about 2 seconds is pretty normal for these trucks since the fuel pump doesn't engage until you've actually turned the key to ignition (rather than many other vehicles' fuel pumps that engage when the key reaches the ON position). (Somebody correct me if I'm wrong here.)





But yeah, it should start the first time.. Do you see this symptom only on cold starts after a night of sitting? Does it ever happen on warm starts?
My truck always started right as I turned the key to ignition. The longer crank time is very unusual. I never had a vehicle that didn't start right away. Even my 98 GMC k2500 with 210k miles starts right off the bat.

It happens almost every morning after it sat all night or when I leave work to go home. It rarely does it on a warm start.

Since then, I have just been turning key to ON after I open the door and wait a little bit and it starts normally every time. I don't mind doing this but not sure how long this will last.
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Old 04-02-2021, 11:41 AM #6
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Originally Posted by Mudeprived View Post
My truck always started right as I turned the key to ignition. The longer crank time is very unusual. I never had a vehicle that didn't start right away. Even my 98 GMC k2500 with 210k miles starts right off the bat.

It happens almost every morning after it sat all night or when I leave work to go home. It rarely does it on a warm start.

Since then, I have just been turning key to ON after I open the door and wait a little bit and it starts normally every time. I don't mind doing this but not sure how long this will last.
Interesting. Sorry I can't be more help here.

I'll be watching to see what you end up figuring out, since my truck usually cranks for 1-2 seconds, and every once in a while in cold weather it won't start until the second attempt (always right away on the second attempt). This after new battery, fuel filter, Denso starter and starter relay, spark plugs, etc.

Based on what I've read on this forum, it seems like many people experience longer-than-expected crank times, but often those threads end up concluding "that's just the way it is."

Good luck!
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