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Coil and cylinder firing order

Tiny
ERICDT62
  • MEMBER
  • 1997 SATURN SEDAN
  • 1.9L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 211,969 MILES
I am getting a code that says #4 cylinder is misfiring. My question is, how do I know what plug wire goes where? In other words, the firing order for the coil is 4123. What cylinder does #4 go to, #1, #2, #3 from the coil to the cylinder(plugs).
Monday, January 11th, 2016 AT 12:58 PM

13 Replies

Tiny
PACO8224
  • MECHANIC
  • 117 POSTS
Maybe this diagram will help you. The engine block of course is the big one and the small one is your coil
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Monday, January 11th, 2016 AT 2:30 PM
Tiny
ERICDT62
  • MEMBER
  • 14 POSTS
I installed a new # 4, 1 coil and there seems to be no change. The car seems like it wants to shut off when pulling off. It is like after it catches or something, it starts moving. After it warms up a bit, it seems to run better. This vehicle was sitting for two years or so, and there were never any maintenance done to it after the second owner got it. It has over 211k miles, and I do not know what else to do. After it runs a while, it runs pretty good. It is the initial start off when I first crank it up. I ran the old gas out of it, dropped a bottle of LUCAS in the tank, and a can of restore in the oil. I am hoping that it will help. What do you think.
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Tuesday, January 12th, 2016 AT 4:38 AM
Tiny
PACO8224
  • MECHANIC
  • 117 POSTS
If no maintenance been done to it, changing spark plugs and especially that fuel filter would help alot
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Tuesday, January 12th, 2016 AT 4:59 AM
Tiny
ERICDT62
  • MEMBER
  • 14 POSTS
I changed plugs, wires, oil, and coil. Have to change oil again because what I thought was oil filter ended up being the transmission filter. The only issue I am having is the loss of power when I first pull off. I haven't gotten it inspected yet, and need to put it on the highway and blow it out. Trying to get it through inspection. Check engine light keeps coming on. I am really puzzled.
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Tuesday, January 12th, 2016 AT 5:12 AM
Tiny
PACO8224
  • MECHANIC
  • 117 POSTS
What codes are in the pcm?
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Tuesday, January 12th, 2016 AT 5:34 AM
Tiny
ERICDT62
  • MEMBER
  • 14 POSTS
Haven't checked yet. The last was showing misfire in cylinder #4, and random misfire in others?
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Tuesday, January 12th, 2016 AT 5:46 AM
Tiny
PACO8224
  • MECHANIC
  • 117 POSTS
Ok make sure you check even the pending codes, and an intake fuel flush wouldn't hurt. It will help get all that carbon build up out
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Tuesday, January 12th, 2016 AT 9:32 AM
Tiny
ERICDT62
  • MEMBER
  • 14 POSTS
The codes I am getting is P-something 300 and 304. Say #4 cylinder misfire and random misfire. Cleared the "service the engine soon" light and it came back on. Haven't really driven the vehicle but planning to drive it about 60 miles or so on the highway later this evening. What do you think?
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Wednesday, January 13th, 2016 AT 10:23 AM
Tiny
PACO8224
  • MECHANIC
  • 117 POSTS
3 rhings, make sure you got the wires going to the right coil spots, check compression on the cylinders especially number 4, check to see if you getting power to the injector number 4 with a test noid. I wouldn't drive it a lot if it's missing
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Wednesday, January 13th, 2016 AT 10:34 AM
Tiny
ERICDT62
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  • 14 POSTS
How do I do all of that?
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Wednesday, January 13th, 2016 AT 10:38 AM
Tiny
PACO8224
  • MECHANIC
  • 117 POSTS
The diagram I sent earlier go by that to make sure the wires are located in the right spot. The rest you need special tools like compression gage, and some noid testers to, check power for injectors
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Wednesday, January 13th, 2016 AT 11:28 AM
Tiny
ERICDT62
  • MEMBER
  • 14 POSTS
I am getting the following codes:
PO 507
PO 300
PO 171
PO 304
I changed plugs, wires, and coil for cylinder 4 and 1
Changed oil and filter, changed trans fluid. Car is running much better with no power loss. Do not have air filter yet, and can barely hear a slight miss. Still getting these codes. Wondering if missing air filter has a lot to do with it. Trying to get it inspected. Running out of time and money. What are your suggestions?
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Thursday, January 21st, 2016 AT 7:19 AM
Tiny
PACO8224
  • MECHANIC
  • 117 POSTS
Sounds like you have a vacum leak somewhere. Make sure you don't get dirt in your mass air flow sensor since you have no air filter in it. Get air filter and check for vacum leaks make sure your throttle body is clean aswell
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Thursday, January 21st, 2016 AT 8:13 AM

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