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 Old 10-29-2017, 05:42 AM   #1
 
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Default Long crank when warm, not hot.

Hi all,

2010 CX-7 2.3 T with about 96K on it. Around 65K it developed a hard start when warm (not hot, not cold, but after sitting for 20-60 min). Never threw a CEL, and the problem eventually just went away. Fast forward and we've been having the same problem since about 85K. It is basically a long crank 4-5 sec, when warm. This morning it did it cold as well (42*F). Once started it will restart fine, unless you let it sit for 20-60 min, then you get a long crank again.

No CEL at all, took to local mechanic and no codes lurking. Plugs have been replaced, but nothing else yet.

Can anyone point me in the right direction? I've read about sticking EGR valves, dirty throttle plates, etc.

The only thing I've noticed is that when doing a long crank I get the evap/gascap light on on the dash. It goes off as soon as the car fires, but the orange light stays on while cranking. I'm not sure that it comes on when the car starts properly, though that could just be that it starts so quickly.

I don't want to just throw parts at it, but I'm lost as to where to start.

Thanks in advance!

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 Old 10-29-2017, 09:44 AM   #2
 
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Is it a slow crank? By long crank you mean the engine just turns over a few more times before it starts up?
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 Old 10-29-2017, 09:49 AM   #3
 
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Fast crank, plenty of battery power, just longer time


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 Old 10-29-2017, 06:05 PM   #4
 
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My 09 speed 3 does that too
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 Old 10-29-2017, 06:36 PM   #5
 
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Originally Posted by Bob-o View Post
My 09 speed 3 does that too
I took the egr out today, soaked it in purple power, followed by hot water to flush it. It didn't seem stuck, but it was carboned up a bit. So far, the engine seems quieter, and starts instantly. Time will tell. Total project time, 2 hrs and 8 oz of purple power. On my Dodge with a Cummins, this is a 67.5k service. Same basic setup, but gas vs diesel. Maybe Mazda should have considered it a 70k service item.

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