Cranks over alot when cold

[Savagecanuck1]

Strange to me as first new truck that cranks over a few times when cold before starting.All my previous trucks 11 duramax,08 5.3,06 F150,04 F150 all started instantly even cold.Is this normal as it starts fine when warm?

[nards444]

yeah mine does that too

[jomuehlbauer]

yeah mine does that too

 

Mine too.. and it's not even cold up in Minnesota yet..

[fondupot]

mine too. just the type of starters GM used.

[CLOSERHawk]

This is interesting. I have been waiting to see if anything was said at all. When I let the truck sit for an extended period of time without starting it, like 3 days (The wife has a GMC Terrain and uses public transportation so I'll drive her car occasionally), I'll get in and fire it up and it's almost as if the engine isn't getting enough fuel initially. It'll start, always has, but it does turn over and kinda rumble a little bit. Extra information: I have almost 2,000 miles and I am putting mid-grade in it, 5.3 liter. Anyone else?

[ktreece]

mine too. just the type of starters GM used.

 

 

Is it something they knew, or something they will fix?

[fondupot]

Is it something they knew, or something they will fix?

 

Nothing to fix. There's nothing wrong. the truck starts right?

[nards444]

Nothing to fix. There's nothing wrong. the truck starts right?

Doesnt mean there isnt anything wrong. The starter does not act like typical starters that fire right up, instead it turns probably 2-3 times maybe 4 then fires. To me feels like maybe the fuel system looses pressure.

[bladz1454]

My new GMC does the same (been in the 20s here in the mornings). After the truck is warmed up, it'll crank over in one spin but I would not worry guys. My Ford never did this but I had a 2004 Acura TSX for 9 years and ever since it left the dealership the starter took 2-3 turns to crank over when cold (first turn when warm out, just like my new truck). Car ran perfectly for 9 years and never left me stranded too so it is what it is.

[fondupot]

Actually now that I think about this more, the longer crank times are probably due to the motor being direct injection. My last car was also DI and it would take a bit longer on cold starts to crank compared to an already warmed up engine. My dads Buick is DI as well and does the same thing. I could call three or four buddies with DI motors in their cars and I bet they would report the same.

 

My guess is on cold starts it takes a bit longer to prime the DI system vs. when the engine is already warm.

 

Not a big deal.

[fondupot]

Actually now that I think about this more, the longer crank times are probably due to the motor being direct injection. My last car was also DI and it would take a bit longer on cold starts to crank compared to an already warmed up engine. My dads Buick is DI as well and does the same thing. I could call three or four buddies with DI motors in their cars and I bet they would report the same.

 

My guess is on cold starts it takes a bit longer to prime the DI system vs. when the engine is already warm.

 

Not a big deal.

 

*edit*

 

Read this article, The first paragraph explains the reason.

 

http://delphi.com/pdf/techpapers/2012-01-0393.pdf

 

 

 

 

ABSTRACT

Gasoline direct injection provides reduced engine emissions,

increased power, and increased fuel economy as compared to

port fuel injection (PFI). Reduced emissions are largely due

to starting the engine using high fuel pressure (up to 150 bar)

and injecting into the compression stroke. During a cold start,

fuel pressure must be increased from lift pump pressure

(typically 4 to 6 bar) to desired injection pressure (typically

25 bar minimum). Start times are therefore impacted by the

high pressure pump's ability to quickly build fuel pressure

during crank.

[Jon A]

Have you guys tried turning the key to the "on" position and waiting a few seconds before trying to start it?

[bladz1454]

Have you guys tried turning the key to the "on" position and waiting a few seconds before trying to start it?

 

[redwngr]

The computer probably does not even try to fire (no injection and no spark) it until it is happy with the fuel pressure and any other pre-start checks programmed in.

[BlueCords&Chevys]

It was -40 this morning in Fairbanks, Ak. I had my truck plugged in and it started within 2 seconds of cranking. I'm pretty happy with that. And then I let it idle for a good 15-17min before I drove off.