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Hard start up in the Morning

Tiny
MOHAMAD KIBRIT
  • MEMBER
  • 2009 GMC TERRAIN
  • 2.4L
  • 4 CYL
  • AWD
  • AUTOMATIC
  • 70,000 MILES
Hello
In the morning it does not start up from first try and the next problem is the idle is too low and when I put it in drive the rpm's are jumping, but not always. I change the plugs and the coil cable and the distribution and still the same. I opened the throttle I could see oil inside, I cleaned it and after two days the the problem returned. I took it to the garage to have it scanned to see the misfire in all cylinders.
Any ideas?
Thank you
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Sunday, April 10th, 2016 AT 3:05 PM

15 Replies

Tiny
CAR-MAN145
  • MECHANIC
  • 321 POSTS
I would check the fuel pump make sure the fuel pressure is not leaking down over night.
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Monday, April 11th, 2016 AT 11:43 PM
Tiny
MOHAMAD KIBRIT
  • MEMBER
  • 8 POSTS
No leaking at all?
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Friday, April 15th, 2016 AT 3:16 AM
Tiny
CAR-MAN145
  • MECHANIC
  • 321 POSTS
Maybe the coolant temp sensor is not reading that its cold. Sound like you may have a bad idle control or maybe a bad throttle body. Its hard to diag something like this without seeing or hearing it.
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Saturday, April 16th, 2016 AT 1:22 AM
Tiny
MOHAMAD KIBRIT
  • MEMBER
  • 8 POSTS
Thank you
But how can I fined the coolant temp sensor to fined if it good or not
Thanks for your info
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Tuesday, April 19th, 2016 AT 5:08 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,616 POSTS
Hey, MOHAMAD KIBRIT

Have you thought of the mass air flow sensor? If this sensor is dirty with contamination it will give a false reading the computer, follow the guide below to clean and get back to us.

https://www.2carpros.com/articles/mass-air-flow-service
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Tuesday, April 19th, 2016 AT 11:54 AM
Tiny
MOHAMAD KIBRIT
  • MEMBER
  • 8 POSTS
Hello ken
If the the mass air flow not working it will show an error in the computer test or the light chek engin go ON but we dont have any error reading in the computer?
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Tuesday, April 19th, 2016 AT 1:45 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,616 POSTS
No error will be recorded because the reading is simply off but not enough to set an error code. Please try to clean it to see how it does, the mileage is perfect for this kind of repair although replacement is the best way to fix this kind of problem, that's why the dealership has an advantage they just pull on off the shelf and then put it back if it doesn't work. Let me know what you find.
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Tuesday, April 19th, 2016 AT 2:42 PM
Tiny
MOHAMAD KIBRIT
  • MEMBER
  • 8 POSTS
Thank you ken for your precious information. I will try this in the weekend
Thanks again :-)
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Wednesday, April 20th, 2016 AT 10:31 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,616 POSTS
Please let us know what you find :-)
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Thursday, April 21st, 2016 AT 7:59 AM
Tiny
MOHAMAD KIBRIT
  • MEMBER
  • 8 POSTS
Ken hello my friend
I tried in the morning to turn on and off 4 times and I start the car it turn on from the first time I think the pump pressure has a problem can you please send me the manual of my car and how can I repair or replace this pump.

Thank you for your support
King regards:))))
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Monday, April 25th, 2016 AT 11:44 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,616 POSTS
Hey,

To change the fuel pump you must drop the tank, its best if you have it low on gas or drain the gas,

here is a leak on how

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

and a pic once you get the tank out

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Monday, April 25th, 2016 AT 3:33 PM
Tiny
MOHAMAD KIBRIT
  • MEMBER
  • 8 POSTS
Hi Ken
Please I need the manual of the gmc terrain 2009 it will be easy for me to make the installation because its under the rear seat
Thank you
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Tuesday, April 26th, 2016 AT 1:36 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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This must be an out of the country car because we don't have this model in our software. It will be very close tot he same because there is not much difference.
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Tuesday, April 26th, 2016 AT 4:57 PM
Tiny
MOHAMAD KIBRIT
  • MEMBER
  • 8 POSTS
Hello ken
Sorry but its same like GM captiva 2010 same motor and body if u have please send to me I don't wand to go to garage again
Thanks for your fast replay and support
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Wednesday, April 27th, 2016 AT 5:39 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,616 POSTS
Is the what you need a pic of the tank or?
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Wednesday, April 27th, 2016 AT 8:51 AM

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