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Coil pack going bad? #4679533
02/27/18 09:49 AM
02/27/18 09:49 AM
Joined: Sep 2015
Posts: 527
Alabama
NavyVet88 Offline OP
NavyVet88  Offline OP
Joined: Sep 2015
Posts: 527
Alabama
2003 Buick Century 3.1L

Here lately ive noticed that first starting the car after a few days without running, the car is temperamental about starting. By that I mean it takes two or three tries to get it started. The engine turns over just fine, but it doesn't actually start until mostly the 3rd and sometimes 4th try.

The motor was replaced about a year ago(used of course) just after I got the car and it was starting just fine at the time. Battery was replaced at the same time. Is this a coil pack going bad?

Thanks guys,


2013 Honda Civic LX 1.8L 140k M1 HM 0w20 with Fram XG7317
2003 Buick Century 3.1L 196k Maxlife 5W-30 with Fram TG3387A
Maintenance Mechanic by trade, working class for life.
Re: Coil pack going bad? [Re: NavyVet88] #4679548
02/27/18 10:01 AM
02/27/18 10:01 AM
Joined: Sep 2007
Posts: 1,022
TX, USA
JMJNet Offline
JMJNet  Offline
Joined: Sep 2007
Posts: 1,022
TX, USA
Load test the battery?
Check the Starter?


  • 2017 Toyota Sienna
  • 1995 GMC Suburban 6.5L Turbo Diesel


Re: Coil pack going bad? [Re: NavyVet88] #4679579
02/27/18 10:42 AM
02/27/18 10:42 AM
Joined: Apr 2017
Posts: 1,481
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline
Joined: Apr 2017
Posts: 1,481
Ontario, Canada
If it is only after sitting for a couple days, I would think the fuel pressure is not being maintained in the system when off. Could be a bad check valve in the fuel pump assembly. Try turning the key to the on position a couple times before starting to let the fuel system prime.


Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
2013 BMW 135i M Sport Edition Castrol 0W40, Redline MTL
Re: Coil pack going bad? [Re: NavyVet88] #4679582
02/27/18 10:48 AM
02/27/18 10:48 AM
Joined: Nov 2005
Posts: 995
Rockwall, Texas
Old Mustang Guy Offline
Old Mustang Guy  Offline
Joined: Nov 2005
Posts: 995
Rockwall, Texas
When I had a coil pack going out the car still started fine but ran rough.

Re: Coil pack going bad? [Re: mightymousetech] #4679597
02/27/18 11:01 AM
02/27/18 11:01 AM
Joined: Sep 2015
Posts: 527
Alabama
NavyVet88 Offline OP
NavyVet88  Offline OP
Joined: Sep 2015
Posts: 527
Alabama
Originally Posted By: mightymousetech
If it is only after sitting for a couple days, I would think the fuel pressure is not being maintained in the system when off. Could be a bad check valve in the fuel pump assembly. Try turning the key to the on position a couple times before starting to let the fuel system prime.


Well the car only gets driven a couple times a week for groceries and such or quick errands. I failed to mention in my opening post that once the engine does start, it struggles to get going unless you press the gas pedal a bit to help it.


2013 Honda Civic LX 1.8L 140k M1 HM 0w20 with Fram XG7317
2003 Buick Century 3.1L 196k Maxlife 5W-30 with Fram TG3387A
Maintenance Mechanic by trade, working class for life.
Re: Coil pack going bad? [Re: NavyVet88] #4679598
02/27/18 11:03 AM
02/27/18 11:03 AM
Joined: Apr 2017
Posts: 1,481
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline
Joined: Apr 2017
Posts: 1,481
Ontario, Canada
Originally Posted By: NavyVet88
Originally Posted By: mightymousetech
If it is only after sitting for a couple days, I would think the fuel pressure is not being maintained in the system when off. Could be a bad check valve in the fuel pump assembly. Try turning the key to the on position a couple times before starting to let the fuel system prime.


Well the car only gets driven a couple times a week for groceries and such or quick errands. I failed to mention in my opening post that once the engine does start, it struggles to get going unless you press the gas pedal a bit to help it.


Could be just plugs. When were they replaced last?

Last edited by mightymousetech; 02/27/18 11:04 AM.

Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
2013 BMW 135i M Sport Edition Castrol 0W40, Redline MTL
Re: Coil pack going bad? [Re: mightymousetech] #4679608
02/27/18 11:15 AM
02/27/18 11:15 AM
Joined: Sep 2015
Posts: 527
Alabama
NavyVet88 Offline OP
NavyVet88  Offline OP
Joined: Sep 2015
Posts: 527
Alabama
Originally Posted By: mightymousetech
Originally Posted By: NavyVet88
Originally Posted By: mightymousetech
If it is only after sitting for a couple days, I would think the fuel pressure is not being maintained in the system when off. Could be a bad check valve in the fuel pump assembly. Try turning the key to the on position a couple times before starting to let the fuel system prime.


About 6 months ago. Oem plugs to boot.
Well the car only gets driven a couple times a week for groceries and such or quick errands. I failed to mention in my opening post that once the engine does start, it struggles to get going unless you press the gas pedal a bit to help it.


Could be just plugs. When were they replaced last?


About 6 months ago. With oem plugs.

Last edited by NavyVet88; 02/27/18 11:16 AM.

2013 Honda Civic LX 1.8L 140k M1 HM 0w20 with Fram XG7317
2003 Buick Century 3.1L 196k Maxlife 5W-30 with Fram TG3387A
Maintenance Mechanic by trade, working class for life.
Re: Coil pack going bad? [Re: NavyVet88] #4679610
02/27/18 11:17 AM
02/27/18 11:17 AM
Joined: Sep 2015
Posts: 527
Alabama
NavyVet88 Offline OP
NavyVet88  Offline OP
Joined: Sep 2015
Posts: 527
Alabama
Could it be the throttle body?

Last edited by NavyVet88; 02/27/18 11:17 AM.

2013 Honda Civic LX 1.8L 140k M1 HM 0w20 with Fram XG7317
2003 Buick Century 3.1L 196k Maxlife 5W-30 with Fram TG3387A
Maintenance Mechanic by trade, working class for life.
Re: Coil pack going bad? [Re: mightymousetech] #4679624
02/27/18 11:26 AM
02/27/18 11:26 AM
Joined: Sep 2012
Posts: 185
WI
BurrWinder Offline
BurrWinder  Offline
Joined: Sep 2012
Posts: 185
WI
Originally Posted By: mightymousetech
Originally Posted By: NavyVet88
[quote=mightymousetech]If it is only after sitting for a couple days, I would think the fuel pressure is not being maintained in the system when off. Could be a bad check valve in the fuel pump assembly. Try turning the key to the on position a couple times before starting to let the fuel system prime.


Well the car only gets driven a couple times a week for groceries and such or quick errands. I failed to mention in my opening post that once the engine does start, it struggles to get going unless you press the gas pedal a bit to help it.




I have a feeling that you most likely have a leaking fuel pressure regulator on the fuel rail, this is a fairly common problem on these engines and is easily diagnosed - remove the vacuum hose going to it on the fuel rail and inspect for any raw fuel vapors / liquid coming out of the regulator ( or filling the vac. line, if failed bad enough ) Just key up the vehicle ignition, ( cycle on but don't start car ) a few times after sitting ( for a bit )
with the vacuum line off... any liquid fuel that comes out and it is automatically a failed part.

The result of this is hard starting as it is too rich from the leaking fuel from the regulator, causing a hard start.

I would put a large bet on this being your failure, esp. at the miles accrued and if it never has been replaced before...

BurrWinder

Re: Coil pack going bad? [Re: BurrWinder] #4679630
02/27/18 11:31 AM
02/27/18 11:31 AM
Joined: Sep 2015
Posts: 527
Alabama
NavyVet88 Offline OP
NavyVet88  Offline OP
Joined: Sep 2015
Posts: 527
Alabama
Originally Posted By: BurrWinder
Originally Posted By: mightymousetech
Originally Posted By: NavyVet88
[quote=mightymousetech]If it is only after sitting for a couple days, I would think the fuel pressure is not being maintained in the system when off. Could be a bad check valve in the fuel pump assembly. Try turning the key to the on position a couple times before starting to let the fuel system prime.


Well the car only gets driven a couple times a week for groceries and such or quick errands. I failed to mention in my opening post that once the engine does start, it struggles to get going unless you press the gas pedal a bit to help it.




I have a feeling that you most likely have a leaking fuel pressure regulator on the fuel rail, this is a fairly common problem on these engines and is easily diagnosed - remove the vacuum hose going to it on the fuel rail and inspect for any raw fuel vapors / liquid coming out of the regulator ( or filling the vac. line, if failed bad enough ) Just key up the vehicle ignition, ( cycle on but don't start car ) a few times after sitting ( for a bit )
with the vacuum line off... any liquid fuel that comes out and it is automatically a failed part.

The result of this is hard starting as it is too rich from the leaking fuel from the regulator, causing a hard start.

I would put a large bet on this being your failure, esp. at the miles accrued and if it never has been replaced before...

BurrWinder


Thank you sir I will check this this weekend when off work.


2013 Honda Civic LX 1.8L 140k M1 HM 0w20 with Fram XG7317
2003 Buick Century 3.1L 196k Maxlife 5W-30 with Fram TG3387A
Maintenance Mechanic by trade, working class for life.
Re: Coil pack going bad? [Re: NavyVet88] #4679660
02/27/18 12:16 PM
02/27/18 12:16 PM
Joined: Nov 2005
Posts: 995
Rockwall, Texas
Old Mustang Guy Offline
Old Mustang Guy  Offline
Joined: Nov 2005
Posts: 995
Rockwall, Texas
When I had a throttle body go bad the symptoms were in fact like you describe.

Re: Coil pack going bad? [Re: mightymousetech] #4679720
02/27/18 01:47 PM
02/27/18 01:47 PM
Joined: Oct 2014
Posts: 12,555
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 12,555
Idaho
Originally Posted By: mightymousetech
If it is only after sitting for a couple days, I would think the fuel pressure is not being maintained in the system when off. Could be a bad check valve in the fuel pump assembly. Try turning the key to the on position a couple times before starting to let the fuel system prime.
This is where to start trouble shooting.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Coil pack going bad? [Re: NavyVet88] #4679726
02/27/18 01:53 PM
02/27/18 01:53 PM
Joined: Dec 2017
Posts: 2,969
SE British Columbia, Canada
Snagglefoot Offline
Snagglefoot  Offline
Joined: Dec 2017
Posts: 2,969
SE British Columbia, Canada
Originally Posted By: NavyVet88
2003 Buick Century 3.1L

Here lately ive noticed that first starting the car after a few days without running, the car is temperamental about starting. By that I mean it takes two or three tries to get it started. The engine turns over just fine, but it doesn't actually start until mostly the 3rd and sometimes 4th try.

The motor was replaced about a year ago(used of course) just after I got the car and it was starting just fine at the time. Battery was replaced at the same time. Is this a coil pack going bad?

Thanks guys,


How old do you think those sparkplugs in the used engine were? Maybe pull and plug and have a look. Spark plug wires also eventually should be changed. Spray a bit of water on the coil pack to see if there are cracks in the coil pack that you might be able to short out as evidence of a problem.




Last edited by Snagglefoot; 02/27/18 01:55 PM.

If you want the job done right......do it yourself.
Re: Coil pack going bad? [Re: NavyVet88] #4679772
02/27/18 02:50 PM
02/27/18 02:50 PM
Joined: Mar 2008
Posts: 5,960
South Florida
bubbatime Offline
bubbatime  Offline
Joined: Mar 2008
Posts: 5,960
South Florida
Throttle body
Fuel pressure
MAF sensor
fuel pressure regulator
leaky injector

Thats what I would look into


17 Chrysler Pacifica Mobil 1 5W30
13 Yamaha XT250 Valv MC 10W40
10 Acura TSX 2.4 Maxlife Syn 5W30
06 GMC Sierra Nextgen 10W30


Re: Coil pack going bad? [Re: NavyVet88] #4679821
02/27/18 04:44 PM
02/27/18 04:44 PM
Joined: Jun 2003
Posts: 17,809
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,809
Deplorable in apple valley, ca
Fuel pressure regulator.


02 Wrangler carlube 5w30
87 F250 traveler 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
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